Earmolds for two-way communication devices

Description of equivalent WO 9623443 A1

0001EARMOLDS FOR TWO-WAY COMi UNICATIONS DEVICES

0002Background of the Invention

0003A. Field of the Invention.

0004The invented earmolds are related to the field of devices used in conjunction with two-way communications wherein the device resides at the opening of the user's ear. This invention is particularly useful because of its unique shape configuration, which provides for improved fit, comfort and hygiene while maintaining high quality sound transmission. This invention is intended to be used in combination with and as an enclosure for both a microphone and a speaker in a two- way communications system. This invention is formed in the general shape of the ear's concha and is produced in a variety of sizes and colors.

0005B. Description of Related Art.

0006Various types of earmolds are manufactured in the prior art, primarily for use in hearing aids. Existing earmolds rely on a deep and tight insertion into the ear canal for providing stability of the hearing aid in the ear. This type of deep and tight insertion tends to cause painful rubbing of the insert against the ear canal and also can have the effect of sealing the ear canal. As a result, the user experiences irritation and discomfort, particularly after many consecutive hours and days of use. Sealing the ear canal has dangerous implications to the wearer. It will affect a person's ability to hear ambient sound by reducing the intensity of the sound. It will alter a person's ability to localize sound, particularly in the high frequencies where interaural sound pressure differences are the primary cue for localization.

0007Summary of the Invention

0008It is an object of this invention to provide an earmold device to hold a two-way communications device in the ear. The invented earmold accomodates both a speaker and a microphone and provides high quality sound transmission.

0009It is an object of this invention to provide an earmold device which holds a two-way communications device at the ear opening in a secure manner. The invented earmold, although not deeply penetrating the ear canal deeply, is securely fastened at the ear opening by use of an extended helix.

0010It is an object of this invention to provide an earmold device which holds a two-way communications device in the ear in a comfortable manner. By securing the earmold outside of the ear canal rather than in the ear canal and by avoiding deep penetration of the ear canal, user comfort is greatly enhanced.

0011It is an object of this invention to provide an earmold device, which holds a two-way communications device in the ear, which provides for reduced feedback by providing improved isolation between the microphone and the speaker. The preferred structure of the earmold accomodates this design.

0012It is an object of this invention to provide an earmold device, which holds a two-way communications device in the ear, which greatly reduces the risk of electrostatic discharge. The isolation of electrical components from the skin of the wearer that is provided by the invented earmold reduces this risk.

0013It is an object of this invention to provide an earmold device, which holds a two-way communications device in the ear, which provides a low pass filter to the speaker response. The preferred speaker arrangement provides the desired low pass filter.

0014The invented earmold gains a stable mounting at the ear opening by using an extended helix of the earmold to cause the earmold to fit under the crus of the helix of the ear. This newly invented configuration, therefore, requires a much shallower insertion into the ear canal, thereby not sealing the ear canal.

0015Another difference between the invention and the prior art is that the invented earmold utilizes a design specifically for use with two-way communications devices. The earmold is designed to house both a speaker and a microphone and to receive and transmit sound in a high quality manner to achieve useful two-way communication.

0016Another feature of the invented earmold that is not found in the prior art is that the invented earmold's profile follows the curvature of the ear canal. By following the curvature of the ear canal, the user's comfort is greatly improved.

0017A further difference between the earmold of the present invention and the prior art is the use of a notch in the earmold. The notch provides relief to the antitragus. Relief to the antitragus is important to prevent compression of tissue at the antitragus and to avoid associated discomfort.

0018Additionally, when the invented earmold is used, no occlusion of the ear canal occurs. By avoiding occlusion of the ear canal, a person's ability to hear ambient sound is not diminished and a person's ability to localize sound is maintained. Occlusion is prevented in the invention by utilization of a vent in the earmold.

0019The invented earmold also includes markings on its surface for reference by the wearer to ensure proper orientation of the two-way communication device .

0020Some of the advantages of the invention over the prior art include: (1) a decrease in the depth of insertion of the device into the ear; (2) increased comfort, since the weight is supported outside rather than inside the ear canal; (3) improved hygiene because of limited insertion; (4) greatly reduced possibility of causing a seal within the ear canal; (5) a decrease in the number of sizes and shapes of earmolds necessary to fit the majority of the population; and (6) specific design features to accommodate use by the general population that does not have a hearing impairment as a component in a two-way communication device.

0021Brief Description of the Drawings

0022Figure la depicts one preferred embodiment of a left earmold of the present invention installed in a human ear.

0023Figure lb depicts one preferred embodiment of a left earmold of the present invention installed in a human ear. Figure 2a depicts one preferred embodiment of a left earmold of the present invention.

0024Figure 2b depicts one preferred embodiment of a right earmold of the present invention.

0025Figure 3 depicts one preferred embodiment of a left earmold with an earphone installed therein.

0026Figure 4a depicts a side view of one preferred embodiment of the invented earmold.

0027Figure 4b depicts a top view of one preferred embodiment of the invented earmold.

0028Figure 4c depicts a top view of one preferred embodiment of the invented earmold.

0029Detailed Description of the Invention

0030This invention is an earmold for use in holding a two-way communications device at the opening of a user's ear. The preferred embodiment of the invention comprises a form in the shape of the ear's concha, sized to fit within the outer ear and composed of a soft plastic material. However, this same invention can be made from a variety of other flexible materials including, but not limited to polyvinyl and silicone.

0031The invented earmold is soft, yieldable and free of rough or sharp edges. It is designed to fit comfortably inside the outer ear. The mold includes a cavity in the outside (first) side for holding an audio communication device. The mold also has incorporated on its first side an alignment mark which is used to indicate to the user the proper orientation of the communications device.

0032In the preferred embodiment, the audio communications device includes both a microphone and a speaker. The mold also includes two protrusions on the inside (second) side. The first protrusion is for the purpose of holding the earmold in place. This is done by inserting the mold into the ear and then rotating the mold so that this first protrusion rests under the crus of the helix of the ear. The second protrusion is for the purpose of providing a means for sound to be conveyed from the speaker into the user's ear canal. This second protrusion is designed to require only a very shallow insertion (approximately 4 mm) into the user's ear canal. This second protrusion also has incorporated into it an ear canal insert vent to prevent a pneumatic seal from being formed in the ear.

0033Figure la shows one preferred embodiment of a left earmold 101 inserted at the opening of a human ear. It can be seen from the figure that the earmold 101 is held in place in the ear, at least in part, by a protrusion or helix 103a. It can also be seen that the earmold has a receptacle 104a to accommodate an earphone containing a speaker, microphone and circuitry. The earmold also has a vent or notch 105a to the ear canal to prevent a pneumatic seal from forming in the ear canal. The vent 105a also accomodates the transmission of sound into the ear canal from the user's surroundings.

0034Figure lb shows a preferred right earmold 102 inserted at the opening of a human ear and generally corresponding to the left earmold 101 of Figure la. The right earmold 102 has a protrusion or helix 103b for holding the earmold in the ear, a receptacle 104b to accommodate an earphone containing a speaker, microphone and circuitry, and a vent or notch 105a to the ear canal to prevent a pneumatic seal from forming in the ear canal and to accommodate the transmission of sound into the ear canal from the user's surroundings. It can be seen from Figures la and lb that the shape and size of the earmold is selected to match and fit within the user's outer ear.

0035Figure 2a shows the first side 201 of the left earmold 101. The bottom 211 of the left earmold 101 and the antitragus notch 212 are shown. A cavity or receptacle 203 is provided to accommodate an earphone with a speaker, microphone and relevant circuitry. The receptacle 203 is located on the approximate center of the first side 201 of the earmold 101, the second side of the earmold being defined as the side of the earmold adjacent to the user's ear. In the preferred embodiment of the invention, the cavity 203 is dome-shaped, with the shallowest part of the cavity being 0.160 inches deep at the outer edge and the crest of the dome extending another 0.070 inches in the center of the cavity 203. The preferred cavity 203 is circular in shape and approximately 0.5 inches in diameter.

0036An alignment marks 205 is shown extending downward and toward the front of the ear, when installed. The purpose of the alignment mark 205 is to indicate to the user the proper orientation of the audio communication device in the earmold. In the preferred embodiment, the mark 205 is located by a raised rib on the bottom of the first side of the earmold. The preferred rib is 0.060 inches in width and 0.015 inches in height.

0037In the figure, the notch 215 which is gas- communicative with the ear canal is shown. The notch prevents a pneumatic seal from being formed in with the ear canal.

0038Labeling 207a and 207b is included on the first side 201 of the earmold 101 to indicate the size of the mold (large) and the intended ear (left ear) respectively. Also shown is the lower lobe 222 and helix 223. The earmold is kept in place in the ear by the combination of the helix and features found on the second side of the earmold, with the assistance of contact, even if slight, by the lower lobe, bottom, and antitragus notch.

0039The description of Figure 2b parallels that of Figure 2a, but for a right earmold. Figure 2b shows the first side 202 of the right earmold 102. The bottom 209 of the right earmold 102 and the antitragus notch 210 are shown. A cavity or receptacle 204 is provided to accommodate an earphone with a speaker, microphone and relevant circuitry. The receptacle 204 is located on the approximate center of the first side 202 of the earmold 102, the second side of the earmold being defined as the side of the earmold adjacent to the user's ear. In the preferred embodiment of the invention, the cavity 204 is dome-shaped, with the shallowest part of the cavity being 0.160 inches deep at the outer edge and the crest of the dome extending another 0.070 inches in the center of the cavity 204. The preferred cavity 203 is circular in shape and approximately 0.5 inches in diameter.

0040An alignment mark 206 is shown extending downward and toward the front of the ear, when installed. The purpose of the alignment mark 206 is to indicate to the user the proper orientation of the audio communication device in the earmold. In the preferred embodiment, the mark 206 is located by a raised rib on the bottom of the first side of the earmold. The preferred rib is 0.060 inches in width and 0.015 inches in height.

0041In the figure, the notch 216 which is gas- communicative with the ear canal is shown. The notch prevents a pneumatic seal from being formed in with the ear canal.

0042Also shown is the lower lobe 220 and helix 221. The earmold is kept in place in the ear by the combination of the helix and features found on the second side of the earmold, with the assistance of contact, even if slight, by the lower lobe, bottom, and antitragus notch.

0043Labeling 208a and 208b is included on the first side 201 of the earmold 101 to indicate the size of the mold (large) and the intended ear (right ear) respectively.

0044Figure 3 shows the left earmold 301 with an audio communications device 302 installed. In this instance, the audio communications device is a device available from JABRA Corporation of San Diego, California which is marketed under the trademark Ear PHONE™. Also apparent from Figure 3 is the size of the particular earphone. The alignment mark 303 is depicted and the power cord 304 for the earphone is shown. The notch 305 to the ear canal, the helix 306, the lower lobe 307, the bottom 308, and the antitragus notch 309 are shown.

0045Figure 4a show a side of one preferred earmold. The second protrusion 401 is extending upward from the base of the second side 420 of the earmold at an angle of approximately 115 degrees from the horizontal to most closely match the curvature of the user's ear canal. The insertion depth of the second protrusion 401 is kept to 6.0 mm or less, in the preferred embodiment, for the purpose of minimizing physical contact with the inner ear canal. The ear canal insert vent 402 is provided to prevent a pneumatic forming seal in the ear. In the preferred embodiment, this vent 402 is 0.090 inches wide and 0.045 inches deep with curved edges inside and outside the vent. The vent 402 extends from the first side of the mold up the side of the second protrusion 401, ending no less than 0.10 inches from the end of the second protrusion 401. The second protrusion 401 is angled back 403 or curved by an amount approximating the concha angle of the a user's ear. The purpose of this angle 403 is to permit a closer, more comfortable fit with the ear. Referring to Figure 4b, a side view of the preferred earmold is shown. The first protrusion (helix) 404 is shown in the top view of figure 4. The first protrusion 404 is designed to fit comfortably under the crux of helix of the outer ear. A valley 406 exists between the first protrusion 404 and the second protrusion 401. The purpose of this valley 406 is to more naturally fit the contours of the outer ear and achieve user comfort. Also, a concha dehump 407 is also included in the lower center of the second side to permit a close fit with the outer ear. A sound bore 409 is provided, extending from one edge of the cavity 203, 204 in the first side to the tip of the second protrusion 401. This bore 409 is used to provide a means for the sound to travel from the speaker part of the audio communications device to the ear canal of the user, and is by nature, gas communicative between the cavity 203 and the wearer's ear canal. In the preferred embodiment, this bore 409 is 0.10 inches in diameter and is as close as possible to the center of the second protrusion 401 while still allowing for the vent 402. The center of the bore 409 is 0.090 +/- 0.030 inches from the edge of the audio communications device cavity 203, 204. An antitragus notch 408 is included in the design of the earmold to provide for a better fit with the user's ear. A shoulder 410 is also provided in the region of the lower lobe 430 for a better fit with the user's ear. Also depicted is the bottom 431.

0046In Figure 4c, a front view of the preferred earmold is depicted. Shown is the first protrusion 401, valley 406, helix 404, shoulder 410, and lower lobe 430.

0047In an alternative embodiment of the invention, the earmold may omit the receptacle for an earphone, the receptacle for an earphone being considered a mounting apparatus for a communications device, and instead use an alternative mounting apparatus for a communications device. For example, the earmold could have a ring on its first side to which a communications device snaps. Other alternatives are possible as well.

0048In another alternative embodiment of the invention, the earmold does not include the second protrusion which penetrates (although not deeply) the ear canal. The second protrusion can be omitted and secure mounting to an ear can still be achieved. A sound bore would still be desired.

0049While the present invention has been described and illustrated in conjunction with a preferred embodiment, those skilled in the art will appreciate that variations and modifications may be made without departing from the principles of the invention as herein, illustrated described and claimed.

0050The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects as only illustrative, and not restrictive. The scope of the invention is, therefore, indicated by the appended claims, rather than by the foregoing description. All changes which come within the meaning and range of equivalence of the claims are to be embraced within their scope.