Event synchronization for detector systems

Description of equivalent WO 03007650 A1

0001A specification general-purpose speaker and its attaching method Technical field

0002the present invention and in-vehicle -- as business, the object for personal computers, the object for home theaters, the object for B G M, etc. -- sound it is related with the general-purpose speaker which can reproduce a signal faithfully -- this kind of speaker -- automatic in the car -- take attachment The -- it is related with the method of forming a soft acoustic field. 'background art

0003audio Speaker power, a sound wave is generated in response to output-power-of-sound current from amplifier -- strange It is Ventilator. It is general, Dynamic type converter, Vibration of a vibrator is made into a sound wave and it is Release. It has an acoustic radiation part shot and carried out. In this acoustic radiation part, they are a corn and a dome at the object for small. A phon is used in usage and the object for large-sized. Sound covering this kind of speaker, and a large frequency band It uses for wave generating combining some speakers with which a caliber is different in many cases, and with quality articles, while becoming very expensive, a large installation area is needed. .

0004on the other hand -- the object for personal computers, and in-vehicle -- speakers, such as business, -- an installation area is limited naturally In order to keep, a comparatively small corn speaker unit is used in many cases. this -- In the speaker of a seed, the corn paper of Speak knitting carries out sound vibration, and it generates a sound wave. this machinery vibration is transmitted from a baffle board -- getting across to a box further It is easy to rock the whole box. if such box rocking occurs -- corn paper from -- frequency with a low generating sound is negated -- situation where a low-pitched sound region is not reproduced precisely It becomes the sound it Ri and a low-pitched sound region became muddy, or faded.

0005in order to prevent box rocking in a small speaker -- former and speaker unit metal Free edge is attached between a frame and corn paper -- this Fret corn paper is made easy to move by Di -- machinery vibration of corn paper is absorbed. this Off even if some Lee edges are effective -- machinery vibration of not being thoroughgoing and corn paper -- perfect -- since it is unabsorbable, vibration gets across to the frame of a speaker unit somewhat -- this Vibration will be transmitted from a baffle board to a box, and will rock the whole Potters. In order to absorb machinery vibration of corn paper, it is vibration suppression steel to the frame of Speak knitting. Using a board is also already proposed. This laminated damping steel sheet, It is usually a thin steel plate of two sheets. It is sandwiches-shaped [ which sandwiched a resin layer with vibration suppression performance in between ]. Put resin. A thing of a layer is called dumping sheet. in this laminated damping steel sheet, a dumping sheet is strange when carrying out type, vibration is absorbed by the arising viscous damping -- this modification -- shearing of a resin layer -- strange since it is dependent on type, even if theoretically thin, while the high vibration suppression effect is expectable -- the characteristic of resin it is -- fine vibration will continue for a long time compared with metal. for this reason, the emitted sound waves overlap more often within a definite period of time -- especially in a low-pitched sound region, muddiness arises in sound It keeps.

0006the present invention, in order to improve the above-mentioned problem about the conventional small speaker -- a proposal -- It is a Was done thing. General-purpose A which can reproduce clearly faithful reappearance and a low-pitched sound region of an audible signal. It aims at providing the Py power. other objects of the present invention, and predetermined oscillating attenuation the vibration suppression metal which has a rate and Young's modulus -- a frame and Puffle board Weaning mount member Provide the general-purpose speaker which does not spoil sound quality by using for either. it is . as for the another object of the present invention, an audible sound in the car turns into indirect sound of a wall in the car -- both sound waves an intermediary with little interference -- the method of attaching the speaker which forms a soft acoustic field is provided They are things. The indication of an invention

0007Electric machine which changes the general-purpose speaker concerning the present invention, and an output-power-of-sound signal into vibration of a vibrator Mechanical transducer, adhering to the acoustic radiation part which emits vibration of a vibrator as a sound wave, and a converter and an acoustic radiation part is surrounded -- almost -- a conical frame -- Speak-Tut it constitutes -- few -- Both -- passing a baffle board for one set of Speak knitting -- Cabinet It includes in A. It is Cabinet about Speak-Tut, usual, one set, or a two-set series. To A It has incorporated. a request is accepted -- a mount member -- a speaker unit and baffle board It is made to intervene between a Puffle board and a cabinet in between.

0008it sets to the present invention -- the members of vibration suppression metal, and speaker Unit The frame of A, and A bag They are a Le board and/or a mount member. The frame of speaker Jet, and the Off Only Rehm's flange may be vibration suppression metal. This vibration suppression metal and decrease of oscillating Fade rate 0.0 Or more 1 Weaning Young's modulusX[ 5.0 ] 1 0⁹N/m²it has the above physical properties -- good -- better To -- oscillating extinction ratio 0.0 Or more 3 Weaning Young's modulusX[ 7.0 ] 1 0⁹N/m²the above physical properties -- an owner -- It carries out. the stoma of this vibration suppression metal, for example, the outside surface, is unacquainted, and an internal stoma is dense Damping alloys or A 1 -- A porous sintered compact and F e -- A 1 system -- they are S i system damping alloys. With the general-purpose speaker of the present invention, it is speaker Unit. The frame of A, and Puffle board Weaning Or opportunity spread by the vibration suppression metal of a mount member on the frame of Speak-Tut By absorbing Mechanical vibration, it is faithful reappearance, the low-pitched sound region, and the super-low-pitched sound of an audible signal. A region is reproduced clearly. The general-purpose speaker of the present invention, one set, or speaker of a two-set series It is Cabinet about a unit. To A, an audible signal is reproduced still more faithfully as inclusion and a speaker unit are two-set series, and a low-pitched sound region can be reproduced still more clearly.

0009It is good Up when it has an acoustic lens with which the general-purpose speaker of the present invention and the front of Speaker power are equipped. It is by carrying out and is .. it consists of metal form hard this acoustic lens and the number mm of thickness and coarse -- this -- Carry out plastic deformation of the metal form to convex, and control the intensity distribution and the phase of a sound source. The directivity of generating sound is diffused suitably.

0010With the speaker attaching method of the present invention, they are an electric machinery converter and an acoustic radiation part, converter It is composition about Speaker power Unit by the frame which adheres and encloses an acoustic radiation part. it carries out -- this Speaker unit passing a baffle board for A -- Cabinet spy included in A Two top chayas are miniaturized as an object for cars. it sets to these two speakers -- Speaker unit either the frame of A, a Puffle board and a mount member -- vibration suppression metal -- from To.

0011it sets to the present invention method -- two sets of Speaker power -- the lower part of the driver seat and passenger seat of a car -- It is and installs for the front. Lower part of the driver seat and passenger seat of both this speaker and a car A speaker front face may be arranged level or upward towards the front. This attachment According to direction of it being possible to arrange the front of Speaker power from the level to perpendicular facing up in a method and a speaker, the position of a virtual acoustic image shifts upwards. A of such a structure By two sets of Py power, an audible sound in the car is almost low-pitched sound of the generating sound from the indirect sound of a wall in the car. A region is fully reproduced and a soft acoustic field is formed.

0012It is made to correspond to both speakers, a driver seat, and a passenger seat, and is in the lower part of a dashboard. It may install backward. In the lower part of the dashboard of both this speaker and a car A speaker front face may be arranged level or upward towards back. This way of attaching It is possible to arrange a speaker front face from the level to perpendicular facing up in a method. two speakers of such a structure -- an audible sound in the car -- mainly -- indirect sound of a wall in the car , -- the low-pitched sound region of generating sound is fully reproduced, and a soft acoustic field is formed. Brief explanation of the drawings

0013Drawing 1, Graph which illustrates the field of an oscillating extinction ratio and Young's modulus about various damping materials It is.

0014Drawing 2, It is an outline sectional view expanding and showing the porous sintered compact used by the present invention. Drawing 3 is cut, and lacks and shows a part of Speak-Tut of the general-purpose speaker concerning the present invention. It is an outline side view.

0015Drawing 4, It is an outline sectional view showing another general-purpose Speaker power concerning the present invention.

0016They are 'figure 5 and an important section sectional view showing other examples of a general-purpose speaker.

0017Drawing 6, It is an important section sectional view showing the example of the general-purpose speaker which has another mount member. It is an explanatory view in which Drawing 7 shows the measuring method of a speaker performance by Frochia 1 A. Drawing 8, In a table, * field is shown at the time [ in / speaker / of the present invention / a speaker performance ]. It is a To graph.

0018Drawing 9 -- the speaker furnished with a wooden Puffle board -- a speaker performance -- It is a graph which displays the segment of time to kick.

0019Drawing 1 It is an approximate account figure of the plating reaction apparatus used for manufacture of 0 and metal form. Drawing 1 1 is set to a commercial speaker -- speaker Unit The cone frame of A, and A The case where the mount member of a porous sintered compact is made to intervene between Enclosures, and intervention It is a graph which shows a frequency characteristic with the case where it does not carry out.

0020Drawing 1 Outline which shows example of general-purpose speaker incorporating two sets of 2 and Speak knitting It is a sectional view.

0021Drawing 1 (a) is Speaker about 3 and a single speaker Yopi Daple speaker. The segment of time in the power characteristic and (b) are graphs which display a frequency domain.

0022Drawing 1 One baffle board is a name about two sets of doublespeakers, 4 and the same structure. Frequency characteristic of the case where it is a porous sintered compact, and the case where the Puffle board of another side is wooden It is a shown graph.

0023Drawing 1 5 and caliber 1 A which shows the frequency characteristic about Speak knitting with 0 c m It is rough.

0024Drawing 1 6 and caliber 1 Another Speakers of 0 c m A which shows the frequency characteristic about A It is rough.

0025Drawing 1 7 -- Drawing 1 5 and a figure -- 1 Two sets of Speaker unit of 6 Dub Ruspi using A It is a graph which shows the frequency characteristic about a top chaya.

0026Drawing 1 Another example of the general-purpose speaker incorporating two sets of 8 and Speak-Tut is shown. It is an outline sectional view.

0027Drawing 1 It is the sound ray figure drawn in the installed position of the in-vehicle speaker concerning 9 and the present invention, and (a) is a sectional side elevation of a passenger car, and (b) is a horizontal sectional view.

0028Drawing 2 It is the sound ray figure drawn in other installed positions of 0 and the vehicle * speaker of the present invention, and (a) is a sectional side elevation of a passenger car, and (b) is a horizontal sectional view.

0029Drawing 2 It is the sound ray figure drawn in the installed position of 1 and the conventional in-vehicle speaker, and (a) is Power. The sectional side elevation of the for vehicle and (b) are horizontal sectional views.

0030Drawing 2 2 is Drawing 2. In the installed position of the in-vehicle speaker of 1, (a) is a speaker performance. The segment of time which can be set, and (b) are graphs which display a frequency domain.

0031Drawing 2 3 is Drawing 2. About a different car from 2, it is Drawing 2. It is Show about the same speaker performance as 2. It is a To graph.

0032Drawing 2 4 is Drawing 2. About the same car as 3, it is an installed position of the existing in-vehicle speaker. Drawing 2 which can be set It is a graph which shows the same speaker performance as 2. The best form for inventing

0033general-purpose speaker 1 concerning the present invention -- speaker Unit The frame of A, and baffle board and either of the mount members or about two or more copies consist of vibration suppression metal -- the frame Flange (figure 3 Drawing number 3 3 references) which can also use vibration suppression metal. Speaker 1 is an object for vehicle *, For personal computers, An object for home theaters, and for B G M, General Ah They are the products for Di etc. The speaker may be Ufa. It can install in speaker 1, and that structure is comparatively simple, that it is cheap and the limited narrow place. It is desirable in it being Something small size. [ being general, and ] it sets to the present invention -- any of , a corn, a dome, or a large-sized phon may be sufficient as the acoustic radiation part of a speaker unit.

0034it sets to the present invention -- although single metal, an alloy, and compound metal are included in vibration suppression metal It is inclusion about a diversified product like the publicly known laminated damping steel sheet which pasted the material different from a metal plate together. It does not carry out. This vibration suppression metal and oscillating extinction ratio 0.0 Or more 1 Weaning Young's modulusX[ 5.0 ] 1 0⁹N/m²it requires having the above physical properties -- these -- each -- a constant peculiar to a substance -- With and an oscillating extinction ratio are the logarithmic decrement in the damped free vibration of a substance -- Young's modulus -- Solid The inside of the body pulls or it is a ratio of compression stress and the distortion in the direction. Oscillating extinction ratio Power SO.0 Young's modulus isX[ 5.0 ] 1 that it is it easy to generate distortion in the sound of a low-pitched sound region to be less than one. 0⁹NZm²Fine vibration continues that it is the following for a long time, and muddiness arises in sound. Preferably, it is Vibration. Dynamic damping rate is 0.0. Or more 3 Weaning Young's modulus isX[ 7.0 ] 1. 0⁹N/m²it is above -- this -- in the range, an audible signal is reproduced much more faithfully -- a low-pitched sound region and a super-low-pitched sound region -- clear -- Reproducing is expectable.

0035Drawing 1, Graph which shows the field of an oscillating extinction ratio and Young's modulus about various damping materials It is. Drawing 1 -- setting -- oscillating extinction ratio 0.0 Or more 1 Weaning Young's modulusX[ 5.0 ] 1 0⁹N /m²Porous sintered compact 2 from which the size of the stoma of an inside-and-outside part differs as the above vibration suppression metal, F e -- A 1 system damping alloys 3 (brand name :M205 2, made in a heat science laboratory) powder metallurgy A l by a method -- S i system damping alloys 4 (product made from limited company Suisaku) it can illustrate -- being illustrated also about the vibration suppression metal as for which Listen is not, it has predetermined oscillating extinction ratio Weaning Young's modulus -- if it becomes It is usable.

0036The above-mentioned vibration suppression metal and an oscillating extinction ratio are 0.0. Since it is one or more, it is Glass wool. It has a sound absorption operation like a conventional sound-absorbing material like Elt, and also Young's modulus isX[ 5.0 ] 1. 0⁹NZm²since it is above, it is rigidity -- rubber and Pane -- like -- displacement -- Vibration is not absorbed. this vibration suppression metal and the corn paper in a speaker unit -- sound the time of carrying out Hibiki vibration -- vibration of the corn paper -- the frame of Speaker power U-Tut -- machinery it prevents vibrating -- since it is not displaced at all even if it performs this vibrational absorption Speak Machinery vibration does not get across to a knitting Weaning cabinet.

0037Porous sintered compact which has desired physical properties 2, They are the metal goods which this artificer invented. it is rigid elegance with the coarse surface -- metal small pieces, such as * Iron farm, -- electricity -- direct energization (Japanese Patent Publication No. 5 8 -- 5 2 5 2 8 No.) While heating, it manufactures by pressurization. United States patent. the 4th -- 4 4 3 4 0 4 No. and Japanese Patent Refer to the 3 2 5 9 0 0 No. 6. Porous sintered compact 2, It is a sound-absorbing material which can absorb a sound wave which is the large frequency of energy. It is conventionally different hard material from glass wool of elegance, felt, etc. it is shown in Drawing 2 -- as -- if a sound wave hits porous sintered compact 2 like arrow a, the hollow of surface 5 will inhale outside a coarse stoma as [ show / The to arrows b and b ] -- it is compressed inside [ 6 ] a dense mechanism -- very minute It becomes heat and escapes to the exterior.

0038Porous sintered compact 2, and being general and particle diameter 6*5 The metal chip of zero mesh is used and he is a connoisseur. It fabricates to plate-like by Electric heating and pressurization. The surface of each metal chip at the time of this fabrication (refer to Drawing 2) to which the stoma on and surface 5 of outside becomes unacquainted since heat escapes and cools inside a sintered compact, and the stoma of inside 6 becomes dense while melting and fusing between chips.

0039Porous sintered compact 2, Single or it obtains from two or more sorts of metal chips. this metal A chip -- a metaled powder object and cutting waste (Dalai powder) etc. -- it is -- alloy which has two metallic components But -- several metal chips from which shape and a kind differ may be mixed. this metal chip As -- iron system metal like * iron cutting waste, the piece of carbon steel, and the piece of stainless steel, aluminum - Um powder, and A 1 -- aluminum Eum system metal like S i alloy cutting waste, copper system metal, and titanium Titanium system metal like powder, etc. can be illustrated.

0040In porous sintered compact 2, they are a glass grain and Pherai besides a metal chip. A powder and Seme A little Tent powder and/or thermosetting resin may be added, and it may be made to unify. this heat hardening resin -- an epoxy resin, polyester * fat, phenol resin, and Jarylf it is Talate resin etc. -- it is also possible to mix with other additives and to add. Even if it contains a little porous sintered compacts 2, ceramics, synthetic resins, etc., these Desired vibration proof can be demonstrated by unifying.

0041it sets to porous sintered compact 2 -- the above-mentioned additive -- abbreviation 1 of the amount of whole It is 0 % of the weight or less. fully maintaining porosity -- 1 0*2 At 5 % of the weight, oscillating attenuation nature falls a little. Porosity At nature sintered compact 2, the content of a metal chip is abbreviation 7 of the amount of whole. It is a vibration suppression if it is 5 % of the weight or more. In the highly efficient Speaker power use which can use it as a metal and requires a high oscillating extinction ratio, it is abbreviation 9. It is desirable in it being 0 % of the weight or more. molding equipment which has porous sintered compact 2, for example, the mold of a square cartridge, (not shown) it manufactures -- it is filled up with the metal chip mixed to the inside of the mold. this molding equipment Level Cerami the electrode board of the shape of one pair of rectangle which is the same surface area on a A board -- an opposite -- it Toward-installs -- intersecting perpendicularly with this, installing the heat-resistant side wall of the shape of one pair of rectangle, and constituting the mold To. the electric wire from a low-voltage transformer is connected to the side edge of one electrode board -- and Electricity of another side An electric wire is connected also to the side edge of the side opposite [ in a polar plate ] to.

0042it puts in almost equally in the metal chip of materials, and a mold -- dropping a press die next -- number It fabricates by pressurizing, while sending and heating 1000-A high electric current to plate-like. At the time of sintering processing, it is maximum 8 to a metal chip. 0 0 Hot forming of 0 A of the high electric current is sent and carried out, and and voltage are usually 2. It is 0 v. In this case, heating temperature is 1 [ in a mold ]. 0 0 Even if it reaches before and after 0 °C, volume diffusion is hardly caused by sending high electric current. opening a phenomenon like conglobulation, reduction of a detailed opening, or disappearance does not occur -- contact during a metal chip In the part, partially, it fused mutually and has combined with it.

0043making the obtained sintering board and the rectangle board which provided the main hole, and carrying out The -- as it is -- Puffle board since it cuts suitably like a mount member in being small even if it uses -- one side -- moreover -- final polishing of both sides is carried out -- it may be used, combining two or more sheets annularly. moreover -- as a Puffle board or a mount member -- the surface of a sintering board -- light-gage enveloping layer of the number m m of thickness it may provide -- this light-gage enveloping layer, for example, a synthetic resin, metal, or general-purpose ceramics It consists of As etc. the febrile state before this sintering board and cooling -- or -- re-heating -- the shape of a solid -- re--- By fabricating, applying to the frame of Speaker power Unit is also possible.

0044in 'general-purpose speaker 1 or Ufa, it responds to the application site of vibration suppression metal -- Porous sintered compact 2, Fe--A l system damping alloys 3, and A 1 -- if S i system damping alloys 4 etc. are chosen suitably -- Yo it is -- . for example, fabrication three-dimensional on frame 8 of speaker unit 7 shown in Drawing 3 it is desirable if comparatively easy damping alloys 3 and 4 are applied -- it is a flange of the frame If it is Over, porous sintered compact 2 or damping alloys 3, and all of 4 can be used. Baffle board 1 shown in Drawing 4 Mount member 1 shown in 0 Talk figure 5 or Drawing 6 2 and 1 Monotonous to 4 Porous sintered compact 2 or damping alloys 3 of A state, and all of 4 are applicable. Plate-like vibration suppression Metal and baffle board 1 0 and mount member 1 2 and 1 They are adhesion or the Porto stop as 4. It may carry out. mount member 1 2 and 1 4, a rectangle section usually as shown in Drawing 5 -- or -- It is the ring formation of L type section. Even if a part of this ring formation is vibration suppression metal Piece of a small board It is also good to distribute vibration suppression metal in the direction of the circumference.,

0045a request is accepted -- it sets to general-purpose speaker 1 -- metal form object 1 which carried out plastic deformation to convex 6 (Drawing 4) Cabinet 1 7 [1 ], i.e., a baffle board, Take so that the front of 0 may be worn. It may attach. Metal form object 1 Irregular and large continuation which amounts to 6 and several millimeters in thickness A stoma can interpret it as it being the metal plate formed in the whole. Metal form object 1 6 is That in the place which usually requires cover of nickel with little cover of electromagnetic waves to electromagnetic waves. The metal according to Re is used. metal form object 1 6 and 1.0 or less appearance density -- With and much long and slender metallic thread-like objects are prolonged crosswise at random, and join together -- as a whole -- Stand being body-like and constituting comparatively hard meshes-of-a-net shape -- a figure -- 1 Plating reaction apparatus [ like ] 2 illustrated to 0 It can manufacture by 5.

0046it is shown in Drawing 7 -- as -- it applies by the present invention Measurement of the Peaker characteristic, and the conventional regular voice A It carries out not by the Sheep method but by a pulse input method. The constant state sweep method is Les of each frequency. While making only bell change into a speaker performance, a pulse input method can be set to a segment of time. It is measurement. a pulse input method -- Drawing 1 3 and a figure -- 2 2 to a figure -- 2 if the F F T technique is used as shown in 4 -- a speaker performance -- not only the pulse reply of segment-of-time (a) but standard Ratio of the transfer function in frequency domain (b) which included topology when the level was the same Comparison becomes possible. In an input signal, it is time width 5. using the rectangle wave pulse for 0 microsecond. this signal and a frequency domain -- abbreviation 1 the characteristic flat to 0 k Hz is acquired -- the -- after -- two A level falls greatly in 0 k H z.

0047in Drawing 7 -- C D -- the rectangle wave pulse of the input signal recorded to R O M, and Audie Oamp 1 it is amplified by 8 -- speaker 1 9 is supplied. The sound wave which came out of the speaker, and microphone 2 0 to amplifier 2 It passes through 1 and is D A T (pre [ Digital , audio , and Te - ] coda) 2. It records to 2. reproducing D A T, after measuring -- F F T Analyze the -- 2 it analyzes using 3 -- personal computer 2 Data reduction is carried out by 4. Measurement room It is in the factory of Suita Store and is minimum 1 as a measure against a noise because of the improvement in a S N ratio. 0 0 time or more of Averaging (addition average) is performed, and a measurement result is obtained. It was which sets directly only sound from the sound reflected from the floor, the wall, and the ceiling, and Speaker power as the data-processing object Because -- even if it removes, the sound of sufficient time length can be obtained directly -- the following experiments -- all -- It is carrying out by this gentleman method. Next, Also by which the present invention is limited to an example although the present invention is explained based on an example It is not that. Speaker unit 7 shown in Drawing 3 may be arranged in a box type cabinet in small speaker 1 of illustration, etc. in Drawing 4.

0048speaker unit 7, and being general and corn paper 3 Hole of a cone which covers 0 of the whole it has vacancy frame 8 -- the flat top part of the frame -- magnet board 3 2 is adhered. Magnet board 3 In the inside of 2, it is a magnetization coil of a cylindrical shape. (not shown) It is corn paper 3 to one side of attachment and the coil. By pasting the main top part of 0, it is the corn paper. Sound vibration is carried out with a magnetization coil. Corn paper 3 Hurrah [ part / its / 0 and / annular circumference ] By pasting on the annular inner skin of Beam 8, the corn paper is stretched, and it is stabilized and is from sound. It carries out raw. frames 8 of vibration suppression metal, and damping alloys 4 (refer to Drawing 1) in which three-dimensional fabrication is comparatively easy from -- it becomes -- the damping alloys are fabricated to the hollow cone of thin meat.

0049It is flange 3 to conical frame 8 and its front peripheral edge. It has 3. flange 3 Baffle board with which 3 provided the circular hole (not shown) it adheres -- this adherence -- bolt Stop -- or it is adhesion. Being general and flange 3 It is the direction of the circumference to 3 and a baffle board. It is desirable when a bolt stop is carried out by three points at equal intervals. plane shape of the perimeter of this baffle board Is a cabinet It is the almost same rectangle as inside dimension of A. the baffle board -- inside of a cabinet. a peripheral wall -- perpendicular -- a metal-fittings stop -- or it pastes up.

0050it sets to a speaker unit -- flange 3 of frame 8 3 -- vibration suppression money it consists of Genus 4 -- the usual metal may be sufficient as other cone portions of the frame. In frame 8, it is flange 3. 3 and other cone portions are one by welding or adhesives. It may change.

0051Speaker power Unit 3 shown in Drawing 4 In 4 and small Speaker power 1, it is a box type cabinet size. It arranges in Tut 17. speaker Unit 3 4 and corn paper 3 Circle which covers 5 of the whole Frame 3 of a gimlet form it has 6 -- the flat top part of the frame -- magnet board 3 8 -- Stick. Corn paper 35 and Magnet. Urabe 3 Sound vibration is carried out with the magnetization coil in eight. Puffle board 1 Porous sintered compact 2 (refer to Drawing 2) which is vibration suppression metal 0 It uses. conical frame 3 6 -- baffle board 1 * ON uses main hole 40 of 0 -- Off of a front peripheral edge Lunge part 4 2 -- Puffle board 1 it adheres to 0 -- this adherence -- the Porto stop or adhesion -- is there. Baffle board 1 In 0, it is flange 4 to the front inner circumference of main hole 40. 2 and ring which fits in The A state slot 44 is formed. Baffle board Plane shape of 1 0 is Cabinet. Inside dimension of A 1 7 It is the almost same rectangle. a cabinet inner circle wall -- perpendicular -- a metal-fittings stop -- or it pastes up. Frame 3 Six flanges 4 2 and Puffle board 1 It is desirable when a bolt stop is carried out in the direction of the circumference by three points at equal intervals to 0.

0052box type cabinet 1 7 and baffle board 1 It is composition about a speaker box in 0. carrying out -- penetration hole 4 for heat dissipation to the side wall 6 is provided -- a cabinet back wall -- Receive of a connector Puttaku 4 7 is attached. Cabinet 1 It is A so that it may be arranged 7 and upward. Tund 4 It is desirable when 8 is installed.

0053Although it does not illustrate in order to manufacture porous sintered compact 2 shown in Drawing 2, it is level heat resistance. Molding equipment which carries out countering installation of the electrode board of the shape of one pair of rectangle which is the same surface area, intersects perpendicularly with and this, installs the heat-resistant side wall of the shape of one pair of rectangle on a sex ceramic board, and constitutes a mold It uses. The size of this mold, and base area 6 7X[ 5 ] 6 7 It is height 1 at 5 mm. It is 5 c m. into the level ceramic board, * ON is carrying out the thermo couple -- the degree of Moth in a mold is measured Things are possible. a mold released sheet is level constructed on the bottom of this mold -- an it top -- cutting waste (Dalai powder) 1 of * iron (F C -- 2 5 and content:carbon abbreviation 3. 5 %, silicon abbreviation 2. 5%, manganese abbreviation 0. 5%) Put in 7 k g. thickness abbreviation 3 Boil Uniformity etc. to be set to zero mm. it carries out -- a mold released sheet is constructed further level.

0054it sets to the above-mentioned molding equipment -- at the same time it drops the press die made from ceramics -- Electricity putting in a source -- current -- 5 0 0 A press die is lowered and pressurized until it becomes 0 A. Pressure 2 1 0 k g/c m²the current which will pass through the inside of a mold if it comes out and pressurization is continued -- 0 to 5 00 it goes up rapidly to 0 A -- continuing a rise further gradually -- after-pressurization 1 0*1 2 minutes -- 6 4 0 It amounts to 0 A. Current is 640. Since it is balancing at 0 A, it is A here. The Les type is raised, and a sintering board is taken out and it cools.

0055decision and processing make this sintering board suitable -- carrying out final polishing further -- baffle board 1 Obtain 0. To. obtained porous sintered compact 2 and stoma Rate approximately 5 it has 0% -- in a thickness direction -- some -- outside table The stoma of a field becomes unacquainted and an internal stoma becomes dense. Porous sintered compact 2 and an oscillating extinction ratio (77) = 0.1 4 and Young's modulus areX[ 1.2 ] 1. 0^N/m²It comes out and is a certain vibration suppression metal.

0056With small speaker 1, it is Puffle board 1 of porous sintered compact 2. 0 is passed and it is Loudspeaker. It is cabinet 1 about Tut 34. In order to install in 7, It is Ah at the reaction of sound vibration of corn paper. Machine vibration is frame 3. Even if it gets across to 6, it is baffle board 1 about the machinery vibration. Zero porosity It is absorbable by nature sintered compact 2. Puffle board 1 0 and corn paper 3 5 corresponds from amplifier. It is cabinet 1 about machinery vibration transmitted from the corn paper when vibrating as an item. He is an intermediary to 7. It does not obtain.

0057Drawing 8 -- setting -- as the example of an experiment -- a caliber 3 c m speaker -- porous sintered compact 2 of Horseshoe a Puffle board is attached -- the segment of time in a speaker performance is displayed. considering it as a comparative example The and a figure -- baffle boards wooden to a caliber 3 c m speaker with 9 are attached. the positive peak value following the peak in which the beginning is negative in Drawing 8 -- a figure -- it of 9 -- abbreviation 2 0 d B size comes. it is -- . porous sintered compact 2 of * iron used in Drawing 8 and oscillating attenuation nature are high -- moreover -- rigid material since it is a charge -- Speaker power Unit 3 4 is fixable firmly. * iron porous sintered compact 2 is compared with wooden [ of Drawing 9 ] -- unit 3 which is reaction the time of the film surface of corn paper moving Absorb more machinery vibration of 4, corn paper 3 the film surface of 5 -- much more -- operation becomes smooth -- an input signal is more faithfully reproduced because the width of amplitude spreads It becomes like. wooden [ of Drawing 9 ] -- in accordance with the character frequency, it is easy to move -- corn paper It has a bad influence on a motion of a film surface.

0058Metal form object 1 which carried out plastic deformation to convex in small speaker 1 shown in Drawing 4 It is about 6. Jacket 1 7 [1 ], i.e., a baffle board, It attaches so that the front of 0 may be worn. Metal Fo - Beam object 1 6 are appearance density. It is 1.0 or less. Many long and slender pieces of nickel are the cross direction. It extends and joins together at random, Meshes-of-a-net shape three-dimensional as a whole is constituted, The thickness About 2 m m is attained to.

0059metal form object 1 6 -- Drawing 1 0 roughly shows -- ' -- obtaining, licking and attaching -- reaction apparatus 2 Use 5. Manufacture is carried out. reaction apparatus 2 it sets to 5 -- metal plate 2 of power Sord 6 -- Le [ Styro of continuation air bubbles - ] board 2 7 and 2 7 is stuck -- fissility with nickel is a high material, and the metal plate performs a surface treatment so that and fissility may become high. on the other hand -- an anode -- nickel board 2 it is 8 -- nickel Plating bath -- nickel sulfate, nickel chloride, and boric acid -- complexing agent When is contained. it sets to reaction apparatus 25 -- external power supply 2 if fixed potential is applied using 9 -- Kaso at Do, the inside of solution to nickel ion is diffusion -- styrene board 2 Air bubbles of 7 passing, approaching an electrode interface and receiving an electron from power Sord -- it is reduction to metallic nickel It is carried out. under the present circumstances, it is alike -- metallic nickel -- styrene board 2 Exist only in the cellular portion of 7. it is that which is -- along with that cellular portion, it grows up at random and joins together. Analysis of metallic nickel power Sord will be taken out if appearance amounts to several millimeters -- styrene board 2 7 and 2 7 -- metal Board 2 it exfoliates from 6 -- a part for styrene is removed further. When proper surface finish is carried out, they are and plate-like metal form object 1. 6 is obtained. metal form object 16 and a press die -- or -- It is possible to carry out plastic deformation to convex by a hand.

0060Metal form object 1 It is To control about the intensity distribution and the phase of a sound source as 6 and an acoustic lens. By To, the directivity of generating sound can be diffused suitably. Speaker unit 3 From 4 The sound wave which came out is metal form object 1. New [ in a net side ] by the irregular hole of 6 are . A sound wave side occurs. Metal form object 1 from this sound wave side The stoma of 6 is passed through and direct It hits the border plane of the sound wave which carries out Advance, the sound wave which once rebounds in the network, and a stoma, and needs. The sound wave diffracted in the Something direction is generated. metal form object 1 6 -- even if light since it is a hard material -- a sound wave -- metal form object 1 it is not absorbed by 6 -- sound quality -- changing -- It can pass to Not. that is, the sound wave which came out of the speaker and A net it arrives at a A side -- there going straight, diffraction, etc. are produced and diffused -- it spreads from a net side to the space of the method of outside. Speaker the directivity of the sound wave which came out of power, and some -- even if it has a level difference etc. in frequency -- metal form object 1 passage of 6 will not change sound quality -- stable sound diffused broadly It becomes a wave.

0061Metal form object 1 About the speaker which attached 6, direction of Sound receiving point is a speaker. Front (0 times) inclination 3 0 times and 6 the frequency characteristic of 0 times is investigated -- the form object does not exist -- said -- a Tooth speaker -- metal form object 1 0 times3 at the time of removing 6 0 times and 6 It compares with the frequency characteristic of 0 times. A frequency characteristic and metal form object 1 Size of the stoma of 6 Although it is dependent also on a number, in a low-pitched sound region, a difference appears well. metal form object 1 6 -- an owner -- the speaker to carry out -- 0 degree * 6 it applies to 0 times -- an output sound pressure level falls gradually the speaker which does not have the form object while it is -- 3 Output [ times / 0 ] of the low-pitched sound region at the time a sound pressure level is raised -- the sound wave which is not stable is generated. [0 0 1] modification in which the present invention of Drawing 5 is another -- being shown -- speaker unit 34 Cone frame 3 6 -- baffle board 5 Main hole 5 of 0 Insert in 1. porous sintered compact 2 Mount member 1 2 -- Speak knitting 3 Flange 4 of 4 The back side of 2, and Baffle Board 5 it is made to intervene between the front fields of 0 -- the direction of the circumference -- the Porto stop of three points or four points -- moreover -- It adheres by adhesion. Puffle board 5 0 is wooden [ usual ] or metal. Mount member An inside diameter of 1 2 is a Puffle board at a rectangle section. Main hole of 5 0 It is almost equal to 5 1. It is ring formation. It consists of a simple substance of a porous sintered compact, or combination of a piece of a small board of two or more sheets. . Mount member 1 2 and Speak knitting 3 There is also a duty which arranges 4 to the front. mount member 1 shown in Drawing 6 4 -- Puffle board 5 2 and cabinet 1 it is made to intervene among 7 -- the Puffle board is wooden [ usual ] or metal. Conical deflection - Beam 3 6 and Puffle board 5 Main hole 5 of 2 * ON uses 3 -- flange 4 of the front end 2 -- a Pi forward peripheral surface -- Puffle board 5 Main hole 5 of 2 It adheres to 3. mount member 1 4 -- Puffle board 5 the combination of the long and slender plate of the rectangle section which is the almost same thickness as 2 -- from Ri and Puffle board 5 The peripheral face and cabinet 1 of 2 or [ pasting up an up-and-down side between the inner walls of 7 ] -- or -- individual -- a metal-fittings stop -- a bolt stop is carried out. Be-A board 5 It is an ornament as 4 and the Lord. It arranges ahead of a baffle board to a sake.

0062Mount member 1 2 and 1 4 and corn paper 3 5 to Speak-Tut 3 Hurrah of 4 Beam 3 Machinery vibration which gets across to 6 is absorbed. Mount member 1 2 and 1 4 and corn paper are As. It is A cube about machinery vibration transmitted from the corn paper when vibrating as the correspondence item from Ump. Network 1 By not telling 7, . machinery vibration is not compounded with a sound wave. therefore, a sound pressure level [ in / with this speaker / a low-pitched sound region ] rises -- audio frequency The sound pressure level in a zone approaches flatly, and a speaker performance improves. Maung Urabe material 1 since machinery vibration of the baffle board itself is nonavoidable in 4 -- the baffle board from -- a made oscillating sound may have a bad influence somewhat.

0063as an example -- Drawing 1 it sets to 1 -- commercial caliber 3 In 8 c m Speaker power (the product made from U R E I, model 8 1 1 B) the cone frame of Speak-Tut, and Enclosure between -- mount member 1 of porous sintered compact 2 it intervenes with the case where 2 is made to intervene -- it makes it is -- case (original state) A frequency characteristic is compared. It is To measure about the frequency characteristic. It is frequency 4 when mount member 12 is made to intervene with To. In the low-pitched sound region below 0*5 O H z The sound pressure level which can be set is rising. this sound pressure level rise and oscillating attenuation nature are high hard porous sintered compact 2 absorbs machinery vibration of the Speaker power Unit itself -- Enclage Box sound etc. are not told to A, i.e., a speaker box, -- as opposed to the beep of the number zone of low frequency waves It is the result of the film surface of The and corn paper moving precisely. as this result -- this speaker Then. -- the sound pressure level in an audio frequency zone approaches flatly -- general -- Speaker The power characteristic improves. reaction of sound vibration of corn paper in a state original on the other hand it gets across to the frame of Speak knitting -- being further transmitted to a cabinet -- A bowl TASS -- the whole rocks by machinery vibration. By such box rocking, it is from corn paper. Frequency with a low generating sound is negated, the sound pressure level in a low-pitched sound region becomes low, and it becomes a situation where a low-pitched sound region is not reproduced precisely.

0064Although not illustrated, with speaker of caliber 3 O c m (product made from J B L), it is frequency abbreviation 7. The knowledge of the rise of a sound pressure level can be carried out to below 0 H z. Thus, rigid porosity A sintered compact is Speaker even if it attaches to a commercial speaker as a mount member for post-installation. Power Unit is beforehand incorporated as one part fixed to Enclosure, and is followed. The is also good. caliber 1 it sets to the speaker of 0 c m -- mount part of a porous sintered compact if material is compared with wooden mount members -- about 2 0 the low-pitched sound region below 0 H z -- sound pressure Level is going up.

0065Drawing 1 Two sets of 2 and speaker units 5 5 and 5 Speaker 5 which incorporated 6 forward and backward 7 is shown. speaker unit 5 5 and 5 having 6, and the usually same shape and function -- corn paper (not shown) Frame 5 of a cone which covers the whole 8 and 5 it has 9 -- the flat top part of the frame -- magnet board 6 0 and 6 1 is adhered. magnet board 6 0 and 6 1 [ near ] -- voice coil of a cylindrical shape (not shown) it attaches -- the coil pasting the main top part of corn paper on one side -- corn paper -- a coil -- Sound vibration is carried out.

0066front U-Tut 5 Frame 5 of 5 8 and Puffle board 6 Main hole 6 of 2 * ON uses 3 -- flange 6 of a front peripheral edge 4 -- baffle board 6 2 -- adhesion or the Porto stop -- adherence It carries out. Nuffle board 6 In 2, it is main hole 6. It is flange 6 to the front inner circumference of 3. It fits in with 4. Circular sulcus 6 5 is formed. Puffle board 6 The plane shape of 2, and cabinet 6 Six inside dimension It is almost the same and a rectangle. on the other hand -- back unit 5 Frame 5 of 6 9 and Puffle Board 6 Main hole 6 of 7 Circular sulcus 6 formed in the back inner circumference of 8 9 -- flange 7 0 is inserted in -- it adheres by the Porto stop or adhesion. Baffle board 6 2 and 6 7 and specified shape The porous sintered compact is coated with thin resin.

0067Nuffle board 6 2 and 6 Among 7, they are two sheets, the Puffle board and the thickness almost same at the shape of isomorphous. Woody board 7 1 and 7 1 is arranged. all four boards are made close and it pastes up -- Cabinet 6 the inner circle wall of 6 -- perpendicular -- a metal-fittings stop -- or it pastes up. a little long and slender box type Cabinet 6 6 and Puffle board 6 2 and 6 a speaker box is constituted with 7 -- the side wall Penetration hole 7 for heat dissipation 2 is provided -- a cabinet back wall -- receptacle 7 of a connector 3 is attached.

0068Speaker 5 The reaction of the sound vibration of corn paper in 7 is speaker unit 5. 5 and 5 Six frames 5 8 and 5 Even if it gets across to 9, It is Puffle board 6 about the machinery vibration. 2 and 6 7 While absorbing by a porous sintered compact, it is speaker unit 5. 5 and 5 The same correspondence item as 6 By inputting, both the speaker unit carries out sound vibration by a corresponding phase simultaneously. It becomes. By this hardware requirement, the film surface of front corn paper is a film surface of back corn paper. Corresponding to vibration, it becomes easy to carry out sound vibration more freely. While reproduction with a low-pitched sound region precise in a speaker with a small caliber is difficult, it is Speaker power 5 of 2 Chain Unit. The rise of a sound pressure level [ in / at 7 / a low-pitched sound region ] can be checked.

0069Drawing 1 3 to a figure -- 1 it sets to 7 -- Speak-List used in the experiment Each A is the same. Caliber 1 it is 0 c m -- each speaker -- metal form object 7 It is a mode except 4. a figure -- 1 in 3, the speaker performance of a single speaker and doublespeaker is compared and, as for single Speaker power, one set of Speak knitting and Daple Spie power use Speak-Tut of a two-set series as mentioned above -- it is the same structure except [ all ] this. Drawing 1 3 -- it is -- a sound pressure level [ in / in a single speaker / a low-pitched sound region ] rises -- doublespeaker The sound pressure level of a low-pitched sound region is improving further rather than single Speaker power.

0070Drawing 1 it sets to two sets of the Daple Spie power of the same structure 4 -- one side -- baffle board Porous sintered compact (brand name : rusk) it uses -- place whose baffle board is wooden on the other hand Each frequency characteristic is compared about Synthesis. Drawing 1 it sets to 4 -- porous glow it sets to reproduction of the doublespeaker using the baffle board of the Connection object, and a low-pitched sound region -- wooden The It turns out that a sound pressure level is still larger than a A shuffle board. Drawing 1 5 and a figure -- 1 6 and caliber 1 two sets of different Speak knitting which are 0 c m -- Frequency characteristics is shown -- both speaker Unit Dip at upper register with big A (falling lump) It has generated. On the other hand, it is Drawing 1. 7, these two speaker Unit The frequency characteristic of the doublespeaker which carries A in two-set series is shown. both speakers -- upper register although dip had occurred -- a figure -- 1 if doublespeaker of 7 is used -- low -- the sound pressure level of compass rises further -- the characteristic where the sound pressure of upper register was stabilized more is shown. Drawing 1 3 to a figure -- 1 Dub [ 7 ] Ruspi . top chaya using the baffle board of the porous sintered compact, compared with the usual speaker, the sound pressure level of a low-pitched sound region is raised -- different Spin the case where two top chaya Unit are used -- each U-List the fault of A -- Get caught -- Special [ like ] It becomes clear that it has a sex.

0071Drawing 1 Speaker power 7 shown in 8 5 and front Speak knitting 7 6 is incorporated perpendicularly and they are and back speaker unit 7. 7 is incorporated horizontally. Speaker unit 7 6 and 7 7 usually has the same shape and function. Front unit 7 Six frames 7 8 and baffle board 7 of a porous sintered compact which carried out resin coating It adheres to 9. Front Unit 7 The back of 6 is cabinet 8. They are enclosure rareness and this closed space 8 at 0. In 1, it is back U-List. A 7 Corn paper (not shown) in the frame of 7 An opening is carried out. back U - Tut 7 Frame 8 of 6 2 and baffle board 8 of a porous sintered compact which acted as * fat Co 1 Tyng adhering to 3 -- and the baffle board 8 3 -- speaker unit 7 in the lower part of 7, it arranges horizontally -- Office Vignette 8 the inner circle wall of 0 -- a metal-fittings stop -- or it pastes up.

0072Speaker power 7 5 is Drawing 1. Speaker power 5 shown in 2 That it is the same as that of 7, and sound vibration of corn paper Reaction is frame 7. 8 and 8 Even if it gets across to 2, It is Puffle board 7 about the machinery vibration. 9 and 8 While absorbing by the porous sintered compact of 3, it is both speaker unit 7. 6 and 7 Vibration of 7 Since it synchronizes in order, the machinery vibration is decreased much more effectively. Speaker 7 That 5 is longwise and This which has a use limited since it is shape similar to the conventional speaker It is few.

0073Drawing 1 9 to a figure -- 2 it is the sound ray figure drawn according to the installed position of 1 and a vehicle * speaker -- a figure -- speaker 1 which is illustrated to 4 is transformed and miniaturized appropriately -- vehicle * speaker It is desirable when it uses by carrying out. A usual instead of the speaker which can be installed, and speaker 1 effective also by the Py power -- Drawing 1 two sets of Speaker power Unit as shown in 2 -- a series -- group The Speaker power etc. which were seen may be sufficient.

0074Drawing 1 it sets to 9 -- speaker 8 4 and 8 4 and car 8 Driver seat 8 of 6 7 and passenger seat 8 it sets under 8 -- it installs positively [ of the seat bottom / the center or a little ahead / Chuo ]. speaker 8 4 and 8 the front of 4 -- driver seat 8 7 and passenger seat 8 It is arrangement for level in the lower part of 8. if it carries out, most sound from both the Spin top chaya will be reflected ahead [ in the car ] directly -- audible sound of a person in the car It mainly becomes indirect sound. When this indirect sound is converged, it is virtual acoustic image 9. 0, 9 0 is automatic. It will be located ahead of a car. 'figure 2 it sets to 0 -- speaker 9 1 and 9 1 -- car 8 Driver seat 8 of 6 7 and passenger seat 8 it is made to correspond to 8 -- in the lower part of a dashboard, it installs backward. speaker 9 1 and 9 if the front of 1 is arranged for level -- a part of direct sound from both speakers -- fate Second seat 8 7 and passenger seat 8 although it spreads radiately in the direction of 8 -- most sound -- a seat -- lower -- a half -- a part -- since it reaches, it is rare to be heard directly. The great portion of direct sound is Dashboard. The indirect sound of these is an audible sound of a person in the car to facing up about the surface of 1 Do a surroundings lump and by being reflected by the windshield ahead of in the car subsequently, and also being reflected in the internal surface of a car. It becomes. At the point of volume and a clear feeling, it is speaker 9. 1 and 9 The direction of the position of 1 is speaker 8. 4 and 8 It is still larger than the position of 4.

0075on the other hand -- Drawing 2 1 and two speakers 9 2 and 9 2 -- the right and left of a dashboard -- To set up Car of Conventional (for example, brand name : Corolla) it sets -- To eject from each speaker A Ray figure is shown. Drawing 2 it sets to 1 -- driver's seat 8 which is a front seat 7 and passenger seat 8 8 Speaker power 9 of the nearer one loud sound is directly received from 2 -- continuously direct from the speaker of the distant one repeating to multiplex by door, window, ceiling, the rear window, etc. after that, after receiving Sounding -- reflection The sound carried out will be heard.

0076Drawing 1 the bottom of a seat like 9 -- Speaker power 8 4 and 8 Spin near when 4 is installed the sound uttered from the top chaya turns around a seat directly, and it reaches listeners 1 of a front seat first -- continuing The -- the sound around which the far speaker turned is received directly. namely, a loud direct sound from the neighborhood -- Acceptance it will not kick but the diffraction sound which turned around the seat will be heard first -- the diffraction sound will hear after that the sound reflected in a door, a ceiling, etc. Into which is not diffracted on the other hand Become Accompanying reflection sound about the direct sound which followed space at feet of a front seat ahead, and time delay. listeners are reached -- this reflective sound will reflect in multiplex in the car further. Drawing 2 the sound which a long distance and listeners 1 hear considerably that the position of the speaker which utters this sound directly is although some sound which goes straight on first in the case of 0 will be heard directly -- a time lag -- raw -- That of To disturb is the same.

0077Drawing 2 2 and publicly known car (brand name : Corolla) about -- Drawing 1 the bottom of the seat of 9 -- Spy power 8 which carried out Place 4 and 8 which is the graph which measured the speaker performance by 4 in the passenger seat. Drawing 2 publicly known car where 3 is another (brand name : Celsior) about -- Drawing 1 The bottom of the seat of 9 Installed speaker 8 4 and 8 Graph which measured the speaker performance by 4 in the passenger seat It is. Drawing 2 4 -- Drawing 2 The same car as 3 (brand name : Celsior) about -- Grad who measured the speaker performance by the Speaker power of a large number conventionally installed in the position in the passenger seat It is Off. a sound source -- respectively -- a figure -- it is a rectangle wave pulse as shown in 7.

0078speaker 8 installed under the seat 4 and 8 in 4 -- Drawing 2 2 in the segment of time of (a), and the sound which is not so loud reach first -- the sound of a certain amount of size follows the Pan -- and a figure -- 2 4 It is the acoustic field diffused like (a). Drawing 2 2 Frequency territory of (b) In a region, per [ a low-pitched sound region to ] 3 k H z is Flush mostly. It has the A characteristic and is Drawing 2 after 3 k H z. 4 How depending on which a sound pressure level falls compared with (b) is early. Figure 2 The speaker performance shown in 3 is Drawing 2. Compared with it of 2, it is much more good. a figure -- 2 the speaker performance shown in 4 -- Drawing 2 4 Loud sound in the segment of time of (a) there are much direct sound which has pressure, and reflective sound -- it turns out that they have reached Sound receiving point. along with progress of a loud direct sound and reflective sound, and time, it becomes small -- it was spread -- In the sound field -- Intermediary To have. Drawing 2 4 In the frequency domain of (b), sound pressure goes up for a while in 1 k H z neighborhood. it is -- the sound pressure level is falling from there gradually to a low-pitched sound region and also junior-and-senior-high-schools compass. it carried out To -- another car (brand name : Corolla) about -- a figure -- 2 About the former as shown in 1 Speaker 9 installed in Place 2 and 9 the speaker performance by 2 -- a figure -- 2 Compare with it of 4. It is further inferior.

0079Drawing 1 9 to a figure -- 2 The sound ray figure and Drawing 2 which are shown in 1 2 to a figure -- 2 the measured value shown in 4 -- further -- audition from -- if it judges -- Drawing 1 the bottom of the seat of 9 -- speaker 8 4 and 8 The sound from 4 is directly direct. listeners are not reached -- diffraction sound has reached the ear first. The sound which progressed and ahead [ seat step ] reaches Sound receiving point as a reflective sound shortly directly after a little time progress. this -- the result of having repeated reflection in reflective sound and space underfoot -- each reflective sound -- one after another -- Acceptance Since it reaches to Sound point, a firm acoustic image will be orientated ahead [ seat step ].

0080. it also sets to a frequency characteristic -- about [ from the number region of low frequency waves ] 3 k H z -- Flush The A characteristic it is -- since depression of a level is early in the number region of high frequency more than things and 3 k H z, and the acoustic field which fully reproduced the low-pitched sound region for the ear are formed. virtual acoustic image 9 0 and 9 when 0 orientates ahead [ front seat ], sound is not sounding disorderly -- ready -- sound -- Sound in a Was done music Hall, Lying Jung room can be taken in. Speaker power , -- since sound does not reach listeners soon directly, it is opened wide from the feeling of oppression of sound, and the acoustic field which does not get tired softly is formed. Drawing 2 the bottom of the dashboard of 0 -- Speaker Power 9 1 and 9 a part of direct sound from 1 removes the point of reaching listeners -- almost the same It is effective.

0081Being general and time acoustic features, such as a Ode trim and a concert hall, stage in the performed sound, sound reaches directly first to a spectator -- subsequently -- primary reflective sound and secondary reflection Sound gets across to a spectator in form which continues with sound and Miyoshi reflective sound and supports the volume of direct sound. it goes -- which becomes rich volume and clear feeling, and the feeling which was further wrapped in sound by this. The Ode trim has made such sound space. as opposed to those who are in in the car since and sound space are small in automatic in the car and reflective distance is short -- direct sound, and primary reflective sound, secondary reflective sound, etc. reach in the near state simultaneously -- those who are in in the car -- 1 High sound pressure will be received in a degree. .

0082On the other hand, Drawing 1 It is Speaker power 8 under a seat like 9. 4 and 8 It is a car when 4 is installed. Those who are inside, instead of the sound from both speakers becoming somewhat low directly, reflective sound is imagination Acoustic image 9 by making 0, primary reflective sound sounds directly like sound also in It is -- a small sky making false space where between spreads greatly -- Drawing 2 0 is almost the same. it carried out To -- it also sets in the car -- time sound, such as a Ode trim and a concert hall Sound space with the characteristic is made. It can do. -The method of one, and Drawing 2 In the conventional position of 1, it is speaker 9. 2, 9 Direct sound and its reflective sound from 2 The dish is made to produce big sound pressure for a time interval in the car. For this reason, disorderly are . It must be judged as package rareness and what also has the difficult normal position of an acoustic image from a direction to sound. also in the frequency characteristic, the level rise near 1* 2 k H z is seen -- jarring The acoustic field is formed. the Speaker power using the baffle board of the vibration suppression metal from this result, etc. -- a figure -- 1 9 and a figure -- 2 Installing under a seat and dash A pod like 0, and in the car It can interpret as having the outstanding effect which improves an acoustic field. Industrial applicability

0083a rigid vibration suppression metal with the general-purpose speaker concerning the present invention, and high oscillating attenuation nature -- speaker using for Unit or a baffle board, or a mount member -- the time of a signal input -- A The Py power U-List the frame vibration of A is absorbed -- carrying out sound vibration of the film surface of corn paper precisely Things are made. What Beam [ Excessive deflection - ] vibration will not be transmitted for to a Puffle board or Enclosure if vibration suppression metal, such as a porous sintered compact, is made to intervene, input signal receiving and reproducing sound faithfully -- a low-pitched sound region and a super-low-pitched sound region -- clear -- being renewable -- clear Sound with contrast will be reproduced. In the tendency, especially in the speaker of the present invention, expression and the sound pressure level of further low compass rise notably by per audio frequency. It is effective.

0084it sets to the general-purpose speaker of the present invention -- since a signal will be simultaneously inputted into the Speak knitting of order by a corresponding phase if Speak knitting is fixed to two-set series, Front speaker Acoustic vibration of the film surface of the corn paper of Unit, and the film surface of the corn paper of back Speak knitting According to Motion, it vibrates more smoothly. as a result, speaker Unit in-series two sets A it compares with the speaker which it had, and the speaker of a single unit -- further -- sound pressure of a low-pitched sound region A level rise Weaning frequency characteristic is stabilized.

0085In the Speaker power attaching method of the present invention, and in the car, it is a driver's seat Weaning passenger seat about a speaker. It installs under a seat or dash A pod, the conventional acoustic field in the car -- non-Loneliness it is contrary although it is the space of Introductory sound -- an acoustic image is made to orientate ahead of a front seat -- sound by which the ready sound plan was carried out An improvement of an acoustic field is attained like an easy hole or a listening room. the present invention method Then. -- sound does not reach listeners soon directly -- since [ ] the sound diffused from the front reaches, the acoustic field space without a feeling of oppression which can be relaxed has been made.