Automobile Sound System and Car Comprizing such a System

0001The invention relates to an automotive sound system and a Automobile with such. There are automobile sound systems known that an audio signal source, for example a Broadcast radio receiver, and a plurality of speakers, and an amplifier for the amplification of the audio signal source input audio signals and for supplying the amplified having audio signals to each speaker. there the amplifier is controlled so that with an increasing vehicle speed the volume of the speakers the reproduced audio signal, respectively, the gain factor of the amplifier is increased. receives the speed signal the amplifier via a supply line from the speed signal of the automobile. By speed-dependent increase of the volume respectively, the gain of the amplifier is a increasing compensation for the increasing rate Drive noise, preferably the increasing rolling noise and increasing wind noise is provided. This ensures that the vehicle occupant and at a higher speed the audio signal still can perceive. In order to is a complete concealment of the audio signal by the drive noise excluded at higher speeds. Still proves the reproduced audio signal as of right poor quality in particular as regards its spatial Resolution which particularly with increasing speed was enhanced.

0002The invention is based on the object of an automotive Sound system and an automobile with a sound system to provide that an improved spatially resolved audio signal reproduces.

0003This object is inventively achieved by an automotive Sound system having the features of claim 1 and an automobile solved with the features of claim 10.

0004Advantageous developments emerge from the dependent claims.

0005The inventive automobile sound system is designed, that speed-dependent the different speakers with varying degrees amplified audio signals applied. This particular enables that the speaker in the rear of the vehicle as opposed to the speakers in front of the vehicle with increasing Speed ​​more fed amplified audio signals , whereby in the rear with increasing speed a volume-moderate significantly canted audio signal relative to the audio signal in the front area of ​​the vehicle interior is reproduced. This specific Controlling the gain factors of the individual speaker channels the amplifier is made possible that the Driving noise changing acoustic environment is not a Destruction of the spatial solvability of the audio signal leads. This was due in particular with increasing Speed ​​greater amplification of the reproduced in the rear Audio signals. This may on the one hand achieved by be that the gain factors of the audio channels Accordingly, for the speakers in the rear with increasing Speed ​​can be increased or the fact that the Gains of the audio channels of the speakers in Front range relative to the gain factors for the rear area be lowered. If the inventive automobile arranged sound system in a convertible, so its is particularly advantageous acoustic effect on the conservation of spatial dissolvability of the audio signals, so the Stereophoneffekts particularly true impact, and just this Vehicles tend to an increasing rate due Wind noise on sound quality and in particular to spatial resolution to lose.

0006According to a preferred embodiment of the automotive sound system assigned to control a memory having a having table showing a mapping of velocity values facing loudspeaker specific gains. Based on this table, the amplifier is determined by the control controlled such that the gain of the audio signals of the audio signal channels of each speaker based on the supplied Velocity value is determined. this table includes the speed-dependent differentiated Amplification factors for the individual loudspeakers, the Speakers in the rear correspondingly stronger reinforced Audio signals received than in the front area. By Recovery of the gain factors from the table in the Memory is a technically very simple and robust control the sound system possible, without expensive processing power manages. Here, the memory both the controller separately as formed as a part of this be. The contents of the memory can be carried preferably change external programming, whereby an adaptation to other speakers, other amplifier stages, other vehicles, in which the sound system is installed, made can be. Thus is a very flexible and specific Customer requirements and technical requirements adaptable given Automobiles sound system that easily and cost-effective manner adapted to the particular needs can be. Thus, even under changed conditions always a customized audio company phones sound even under different external conditions, particularly in different speeds of the vehicle is ensured.

0007Preferably, the sound system with an input unit provided, which is connected to the controller and by means of the assignment of the loudspeaker specific gains is securable to the speed values. By means of Input unit, the data stored in the table in memory Speed ​​values ​​and the gains by new values ​​or factors replaced or supplemented or deleted will. A supplement is required when new speaker and thus the need for a new audio channel added, while removal is relevant when an audio channel by removing a speaker or by replacing the amplifier by a less audio channels is required.

0008Furthermore, it is possible that by the input unit parameters for the calculation of the individual amplification factors according to a mathematical relationship as a function of the speed values as another preferred embodiment of entered the control of an inventive sound system will. This particular configuration of the invention Sound system with a down the loudspeaker specific Gains based on a calculation rule depending on the supplied velocity values allows a very simple and secure defined destination the individual loudspeaker specific gains. In this case, a memory with a very extensive Table with a plurality of gain factors for each single speed value be dispensed with, which for Handling of the sound system, particularly when using a digitally controlled Reinforced by a DSP's of Advantage. These DSP blocks show calculators for calculating the individual digital sound signals, said Computing works now according to the invention to calculate the various loudspeaker specific amplification factors depending the fed rate securities based on a parameter-dependent Calculation rule used. Inasmuch no additional calculating unit for calculating the gains required for erfindunsgemäße Soundsystem what the cost, the programming effort and the Hardweareaufwand substantially reduced for such a sound system.

0009It has proven particularly useful, the loudspeaker specific Gains for the rear disproportionately to increase the velocity values, whereby a very I entered the and spatially resolved sound of the sound system given is. A quadratic relationship is a particularly proven increase in volume in the rear relative to the increase in the front depending on the speed given. By the invention it is ensured that fading between the rear area and the front area of ​​the Passenger compartment of the automobile at an increasing rate the automobile changed toward the rear compartment, thereby the volume of the reproduced through the speakers in the rear Audio signals relative to which of the speakers are front area increases.

0010It has proven particularly useful addition to this invention, loudspeaker specific velocity-dependent amplification the individual audio signals in addition a frequency range dependent Determining the amplification factors provide. This additional dependency is ensured, that the seemingly increasing rate vanishing Audio signals in the bass range and / or in the height range undergo additional speed-dependent gain. Thus, for each speaker of the sound system automotive a specific for this audio channel gain, which is dependent on speed and from a Proportion of gain depending on the frequency specific Training of the audio signal and another portion the amplification factor on the location of the speaker in Fahrgastzele (rear compartment or front area or between) directed. This combination is a particularly advantageous sound in the car even under very difficult acoustic conditions of a passenger compartment, For example, in the passenger compartment of a convertible, optionally.

0011According to a preferred embodiment of the erfindunsgemäßen Sound system is the controller designed such that the loudspeaker specific and possibly frequency-specific amplification factors in dependence of the speed signal a maximum value, an upper limit, not exceeding such that destruction of the speaker, the amplifier stages or individual components of the sound system is prevented. in the Moreover, it is hereby ensured that the reinforced show audio signals no clipping, which overdriven by Amplifier stages is caused.

0012In addition to the sound system, the invention relates erfindunsgemäßen also an automobile with an automobile sound system, which over the passenger compartment distributed speaker has. These are both in the rear compartment and in the front area of ​​the passenger compartment are arranged speakers and by appropriate Audio channels of the amplifier specifically with amplified audio signals provided. In this case, the amplifier is controlled so that the individual amplifier stages in the individual audio channels Depending on speed different gains use for the gain of the audio signals. This is ensures that the speakers in the rear with increasing Speed ​​more receive amplified audio signals, while the speakers in the front area less get fed amplified audio signals. This difference the gains and thus the volume of the audio signals the Fondbereichtslautsprecher over the front range speakers is an increasing rate are getting bigger.

0013Preferably, the supply line for the speed signal through a CAN bus, I²C-bus or an I-bus line implemented, on between the individual components of the vehicle relevant vehicle data is exchanged. For example be this Fahrzeugbusleitung from tachogenerator given the speed signal to the bus line and may then by all components of the vehicle, including by the automotive sound system on the bus, it being transported towards automobile sound system are tapped and the control unit are supplied for further processing.

0014A preferred embodiment of the invention is in the Drawing and is described in detail below.<dl tsize="7"><dt>Fig. 1</dt><dd>shows the exemplary structure of the invention Automobile and</dd><dt>FIG. 2</dt><dd>shows an exemplary structure of an amplifier the exemplary audio sound system of FIG. 1.</dd></dl>

0015In Fig. 1 an inventive automobile 1 is shown, which the passenger compartment in the rear area A and the front area B breaks down. At the front of B is the driving position and the front passenger position arranged. The automobile 1 is equipped with an automotive sound system comprising a Vertärker 2, a data source 3 in the form of a CD changer and four speakers 4A, 4B shows. The speakers 4A, 4B are arranged distributed over the passenger compartment, with two loudspeakers 4A are arranged in the rear area A, while the other two speakers 4B Front B of the passenger compartment the automobile 1 are arranged. The amplifier 2 and the CD changer 3, behind the rear seat of the automobile arranged outside the passenger compartment, whereby the amplifier 2 and the CD changer 3 very well through the open trunk are the automobile 1 accessible.

0016The information generated by the CD changer 2 Audio signals are supplied to a supply line to the amplifier 2 and by the Amplifier 2 amplifies, said Audiosingal by four amplifier stages 9, each associated with a loudspeaker 4A, 4B are, be speaker specifically enhanced.

0017From Fig. 2, the basic structure of the amplifier 2 is in accordance with 1 shown FIG.. The amplifier 2 shows three leads, a supply line 7 for the speed signal V of the automobile 1, a feed line 8 for the reading in and out of gain factors or speed values ​​and a supply line 10 for the supply of audio data from the CD changer 3. These leads 7, 8, 10 are connected to the controller 5 of the Amplifier 2 is connected which, in turn connected to the memory 6 of the amplifier 2 and the four amplifier stages of the amplifier 9 2 is connected. In the controller 5 that are the lead 10 input audio data of the CD changer 3 processed and sent to the amplifier stages 9 to loudspeaker specific Reinforcing forwarded.

0018In addition to a number of specific audio signal processing functionalities shows the controller 5, the possibility of the Fadeing between the speakers 4A in the rear compartment A to speakers 4B in the front area B to speed-dependent change. It is based on the on the cable 7 fed Speed ​​signal V from the memory 6 to the respective current speed of the car 1 read gain factors for the gain stages 9 and the controller 5 the individual amplifier stages 9 supplied. This increase in accordance with the specific speaker read the gains supplied to them Audio signal and direct it to the corresponding thereto Speakers 4A, 4B on. In this case, in the memory 6 is a Table stored, the tabular assignment of velocity values to the individual amplification factors for represented the individual amplifier stages 9, which firmly a speaker 4A, 4B are connected, said at a fixed position of the passenger compartment are arranged. Using this tabular assignment, it is possible that each speaker 4A, 4B-specifically abhänig of each speed signal differentiated each other to apply with different degrees amplified audio signals.

0019By setting the gain factors in dependence on the speed in such a way that with increasing speed the gain factors for the speakers 4A in the rear compartment A are larger than those for the speakers 4B Front B, it is possible the sound in highly differentiated form the passenger compartment, while the obtain spatial solvability of the acoustic audio signal. This spatial solvability is the possibility for the different speeds advantageously maintained.

0020An additional velocity-dependent increase in the Gains for audio signals in the bass and also in Height frequency range, it is possible, pleasant, spatially differentiated to further improve sound and disturbing Road noise, which are speed-dependent, in the background leave to enter.

0021Via the supply line 8 of the amplifier 2, which with a connected input unit for the control of the sound system , it is possible for the individual in the table in memory 6 stored values, whether speed values ​​or Amplification factors to change, delete or supplement. This makes it possible, the automobile sound system to changed adapt external conditions. These changed conditions are either through an altered sense of hearing of the User or by changing technical aspects of the sound system be caused. For example, one other Speakers are supplied to the sound system, the existing Amplifier channel respectively of an existing amplifier stage 9 or an additional amplifier stage is assigned. It is necessary that the modified or added table Gains are enrolled and those for speed-dependent control of the automobile sound system be used. If the automobile sound system expanded a vehicle and another vehicle installed a different type, as this will affect the optimized set the loudspeaker specific gains, each having a specific speed value assigned. Due to the possibility of an input of modified velocity values ​​and / or gain factors, it is possible to adapt the automotive sound system without hardware change simply by changing the control parameters make what the universal, inexpensive Using the automotive sound system for a plurality of Automobiles makes clear.

LIST OF REFERENCE NUMBERS

0022<dl tsize="7" compact="compact"><dt>1</dt><dd>automobile</dd><dt>2</dt><dd>amplifier</dd><dt>3</dt><dd>Audio data source, CD changer</dd><dt>4A, 4B</dt><dd>speaker</dd><dt>5</dt><dd>control</dd><dt>6</dt><dd>memory</dd><dt>7</dt><dd>Transmission of the speed signal</dd><dt>8th</dt><dd>Supply of parameters of the table</dd><dt>9</dt><dd>amplifier stages</dd><dt>10</dt><dd>Transmission of the audio signal</dd><dt>A</dt><dd>Rear area of ​​the passenger compartment</dd><dt>B</dt><dd>Front area of ​​the passenger compartment</dd></dl>