TW201820889A - Integrated loudspeaker device having an acoustic chamber containing sound adsorber material - Google Patents

Abstract

An acoustic device having a housing and an acoustic transducer is disclosed. The housing has a transducer space for the acoustic transducer, and a back volume space. The back volume is filled with a sound adsorber material. The sound adsorber material in the back volume space is configured to virtually increase the size of the back volume space, and shift the resonant frequency of the back volume space. The acoustic chamber for the acoustic transducer and the sound adsorber material is integral to the split-shell housing of the acoustic device. The sound adsorber material is retained in a portion of the acoustic chamber by an acoustically permeable material that facilitates gas exchange within the back volume space, and between the sound adsorber material and the transducer space. The acoustically permeable material is configured in different arrangements to facilitate the gas exchange.

Description

Integrated speaker unit with acoustic chamber containing sound absorbing material

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the field of acoustic devices and, more particularly, to a small speaker device having a sound absorbing material integrated into a volumetric portion of the outer casing of the speaker device.

In acoustic technology, a conventional system is to place a sound absorbing material in a rear volume of a speaker device to acoustically enlarge the rear volume in practice. In a speaker device having a physically smaller rear volume, a sound absorbing material reduces the resonant frequency of the speaker device to a value similar to one of the speaker devices having a substantially larger rear volume. More specifically, the sound absorbing material disposed in the rear volume of a speaker device improves its sound characteristics, such as broadband performance and the apparent acoustic volume of the speaker. Examples of sound absorbing materials include zeolitic materials, zeolite-based materials, cerium oxide (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₃ ), magnesium oxide (MgO), and triiron tetroxide (Fe ₃ O). ₄ ), molecular sieves, fullerene, carbon nanotubes and activated carbon or charcoal. Unlike activated carbon, zeolitic materials and zeolite-based materials are electrically isolated. Since the zeolitic material and the zeolite-based material are not electrically conductive, the zeolitic material and the zeolite-based material do not affect the electrical components (eg, antennas, batteries, internal electronics, etc.) incorporated into one of the speaker devices having one of the sound absorbing materials. . Further, if the non-conductive zeolite material or the zeolite-based material becomes slack in the apparatus, the non-conductive zeolite material or the zeolite-based material will not cause a short circuit. In addition, the encapsulation of zeolitic materials and zeolite-based materials is much easier than in the case of activated carbon braids. A problem arises when a sound absorbing material composed of powder, loose particles, loose particles or at least a powder, loose particles, loose particles is inserted or placed in a volume after the speaker device is placed. In addition, the rear volume of a small speaker (such as one of the speaker devices placed in a mobile phone, earphone, etc.) is typically constrained by other circuit components in the direct physical area surrounding the speaker, and sometimes the shape of the rear volume is more complex and Does not meet acoustic requirements. One prior art technique uses a tube that wraps a sound absorbing material, but such tubes are typically not well fitted to a back volume having a complex shape. Inserting the sound absorbing material directly into the back volume can be difficult in practice. In addition, if the sound absorbing material is not securely packaged, it can enter different components of the speaker device and the handheld device using the speaker device, and thus, damage the speaker device or the handheld device including the speaker device as a component. U.S. Patent Application Serial No. 13/818,374, the entire disclosure of which is incorporated herein by reference in its entirety, the entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire content Speaker for the case. The audio system disclosed in application Serial No. 13/818,374 includes a zeolite particulate material or a substantially spherical zeolite particulate material that fills one of the resonant volumes of a speaker. The zeolitic material is a sound absorbing material which, depending on the formulation of the material, results in an actual acoustic expansion of one of the volumes of the resonant space by a factor of 1.5 or greater. Therefore, the volume of the outer casing of the speaker containing the zeolitic material can be made smaller than the outer casing of one of the speakers filled with air. Encapsulation of a zeolite-based material, one of the internal sound absorbers of a volume after use as a small speaker, such as that found in today's handheld consumer electronic devices, has been challenging. Although not electrically damaging, the zeolitic materials disclosed in application No. 13/818,374 may interfere with proper operation of a small speaker and other components within a handheld consumer electronic device, if not properly contained within the device. Moreover, due to the generally limited space within the compact volume of a small speaker, the impedance of the gas exchange and the efficiency of the zeolite-based sound absorber can be reduced by design constraints. Although the small speaker rear volume can be completely filled with a zeolite-based sound absorber, as long as a limited amount of the sound-absorbing surface area is exposed to the pressure change caused by the movement of the acoustic sensor, the resonant frequency shift disclosed in the application No. 13/818,374 It will be limited.

The disclosed invention relates to a housing component of a mobile device, such as a speaker, that forms an integrated acoustic chamber of an acoustic sensor when engaged. The acoustic chamber has a rear volume, a front volume, and a volume occupied by the acoustic sensor. In the volume portion of the acoustic chamber, a plurality of sound absorbing materials are disposed in one of the chambers created by the walls of the acoustic chamber. The chamber containing the sound absorbing material is sealed from the remainder of the acoustic chamber using a gas permeable material having a low acoustic resistance. The gas permeable material retains the sound absorbing material in its designated chamber while allowing gas exchange between the sound absorbing material and the remainder of the acoustic chamber. An embodiment of a housing for a mobile device in accordance with the present invention can include: a printed circuit substrate; and a shield configured to cooperate with the printed circuit substrate to produce an outer casing of one of the mobile devices. In this embodiment, the shield can include a chamber wall defining a substantially sealed acoustic chamber when engaged with an inner surface of the printed circuit substrate; an acoustic sensor (such as a speaker or receiver) Disposed in the acoustic chamber; a hammer that is acoustically coupled to the acoustic sensor; an interior chamber wall disposed within the acoustic chamber and defining a rear volume; and a plurality of sound absorbing materials disposed on Within the rear volume. In this embodiment, a gas permeable member is mechanically coupled to a top portion of the chamber wall and a top portion of the interior chamber wall, wherein the gas permeable member retains the sound absorbing material within the acoustic chamber Define the volume. The gas permeable member of this embodiment has low acoustic resistance and may comprise one or more of a cashmere material or a mesh material, and the pore diameter of the material of the gas permeable member is adapted to be smaller than the size of the sound absorbing particles. The gas permeable member is mechanically attached to the top portion of the interior chamber wall of the chamber wall by gluing, crimping, stamping, stamping, heat sealing or ultrasonic welding. This embodiment can further include a chamber liner interposed between the printed circuit substrate and the top portion of the chamber wall, wherein a thickness determination of the chamber liner is limited by one of its promoting gas exchange size. Moreover, this embodiment can further include a sound pad inserted between the acoustic sensor and the cover disposed in the shield, wherein the hammer pad seals the front volume from the rear volume . In this embodiment, in the acoustic chamber, the post-volume portion is partially filled with a zeolite-based material having substantially spherical sound absorbing particles of a minimum diameter of at least 300 microns. Another embodiment of a housing of a mobile device can include: a first housing component including a printed circuit board having an acoustic sensor electrically and mechanically coupled to the printed circuit board; A second outer casing member mechanically coupled to the first outer casing member to form the outer casing of the mobile device. In this embodiment, the second housing component can include: a continuous vertical component that defines a substantially sealed acoustic chamber when engaged with the printed circuit board of the first housing component; Acoustically coupled to one of the acoustic sensors (eg, a speaker or a receiver) in an sensor space; an internal vertical member disposed in the acoustic chamber and intersecting the continuous vertical member to define a rear volume a plurality of sound absorbing particles disposed within the rear volume; and a sound permeable material mechanically coupled to a top portion of one of the continuous vertical members and a top portion of the inner vertical member, wherein the sound permeable material The sound absorbing particles remain in a defined space within the acoustic chamber. In this embodiment, the acoustic sensor occupies the sensor space when the first housing element and the second housing element are coupled together. In this embodiment, the rear volume portion of the acoustic chamber is partially filled with substantially spherical particles having a minimum diameter of at least 200 microns (or in another embodiment, at least one of 350 microns) One of the zeolite-based sound absorbing particles. This embodiment can include a chamber liner interposed between the printed circuit board and the top portion of the continuous vertical member, wherein a thickness of one of the chamber liners is determined by a size that promotes gas exchange. . In this embodiment, the sound permeable material can be mechanically attached to the top portion of the continuous vertical member and the top portion of the inner vertical member by adhesive or ultrasonic welding. In a variation of this embodiment, the internal vertical member can include an opening configured to facilitate gas exchange of the sound absorbing particles, wherein the opening can include having substantially the same mechanical coupling to the continuous vertical member a material of the acoustic resistance of the top portion and the top portion of the inner vertical member, and the material disposed in the opening of the inner vertical member may comprise a cashmere material or a mesh material One or more. In a further variation, the internal vertical element can include an opening configured to facilitate gas exchange of the sound absorbing particles, wherein the opening can include having the top portion that is differently mechanically coupled to the continuous vertical element and One of the sound permeable materials of the top portion of the inner vertical member is acoustically resistant to one of the materials. In some embodiments, the material disposed in the opening of the inner vertical member can include a gas permeable material that can be sized to retain the sound absorbing particles in a defined area of the back volume. Multiple apertures. In some embodiments, the housing can include a voice cassette interposed between the acoustic sensor and the sound cassette disposed in the second housing element, wherein the sound pad is configured to The first outer casing element seals the sound from the rear volume when engaged with the second outer casing element. Another embodiment of a housing of a mobile device can include: a first housing component including a printed circuit board having an acoustic sensor electrically and mechanically coupled to the printed circuit board (eg, a speaker or receiver); and a second housing component mechanically coupled to the first housing component to form the housing of the mobile device. The second housing can include: a continuous vertical member defining a substantially sealed acoustic chamber when engaged with the printed circuit board of the first housing member; a sound chamber disposed to be acoustically coupled to the acoustic One sensor space of the sensor; an internal vertical element disposed in the acoustic chamber and intersecting the continuous vertical element to define a back volume. In this embodiment, the inner vertical member can include: an opening configured for gas exchange; a low acoustic resistance insert that completely covers the opening; a plurality of sound absorbing particles disposed within the rear volume a sound transmissive material mechanically coupled to a top portion of one of the continuous vertical members and a top portion of the inner vertical member, wherein the sound permeable material retains the sound absorbing particles in a defined space within the acoustic chamber. This embodiment can also include a chamber liner interposed between the printed circuit board and the top portion of the continuous vertical member and the top portion of the inner vertical member. In this embodiment, the acoustic sensor occupies the sensor space when the first housing element and the second housing element are coupled together. In some embodiments, the low acoustic resistance insert and the sound permeable material in the inner vertical element each comprise one or more of a cashmere material or a mesh material. Moreover, in some embodiments, the rear volume portion of the acoustic chamber is partially filled with zeolite-based sound absorbing particles having substantially spherical particles having a minimum diameter of at least 300 microns and a maximum diameter of 900 microns. An embodiment of a housing for a mobile device can be made in the following manner. After the shield has been substantially completed, it is easy to receive the material in the volume portion of the acoustic chamber designated for the sound absorbing material. A large amount of sound absorbing material was measured and loaded into a dispensing funnel. The shroud is positioned below the dispensing funnel and vibrates when the sound absorbing material is poured into a designated portion or portions of the back volume of the acoustic chamber. If the back volume has a plurality of chambers, the sound absorbing material measuring step and the dispensing step will be repeated as many times as needed. After filling, the shield vibrates a plurality of times to ensure that the sound absorbing material settles to the designated portion or portions of the acoustic chamber. Next, a gas permeable member is placed over the acoustic chamber and mechanically attached to the acoustic chamber by gluing, ultrasonic welding or other techniques. A chamber liner is aligned with the wall of the acoustic chamber, and then the printed circuit substrate is bonded to the shield, thereby completing the housing of the acoustic sensor of the mobile device. Other embodiments of a housing for a mobile device can be made in the following manner. After the shield has been substantially completed, it is easy to receive the material in the volume portion of the acoustic chamber designated for the sound absorbing material. A gas permeable member is placed on the acoustic chamber that will receive the sound absorbing material and mechanically attached to the acoustic chamber by gluing, ultrasonic welding or other techniques. A large amount of sound absorbing material was measured and loaded into a dispensing funnel. Positioning the shroud under the dispensing funnel and pouring the sound absorbing material into a designated portion of the backing volume of the acoustic chamber through a dispensing funnel aligned with one of the loading jaws disposed in the shroud Vibrate when there are several specified parts. If the back volume has a plurality of chambers, the sound absorbing material measuring step and the dispensing step will be repeated as many times as needed. After filling, the shield vibrates a plurality of times to ensure that the sound absorbing material settles to the designated portion or portions of the acoustic chamber. A chamber liner is aligned with the wall of the acoustic chamber, and then the printed circuit substrate is bonded to the shield, thereby completing the housing of the acoustic sensor of the mobile device. Other features and advantages of the disclosed invention will be apparent from the description and appended claims.

A detailed description of one of the disclosed embodiments will be provided with reference to the drawings. While the present invention is susceptible to various embodiments of the present invention, the embodiments of the present invention are intended to be It is not intended to limit the invention to the embodiments disclosed. Referring to Figures 1 and 2, a speaker device 10 is illustrated. The speaker device 10 includes an upper speaker housing 13, a lower speaker housing 14, and an acoustic sensor 12. The upper speaker housing 13 is joined to the lower speaker housing 14 using fasteners, locking tabs or a suitable adhesive. The adhesive used to join the upper speaker housing 13 and the lower speaker housing 14 preferably does not have any venting characteristics that can affect the sound absorbing material in the rear volume and affect its efficiency. When the sound absorbing material 19 is internally disposed in the speaker device 10, the broken line 15 indicates the internal position of the sound absorbing material 19 in the speaker device. The upper speaker housing 13 includes a sensor opening that allows for sound propagation/airflow from the acoustic sensor 12 to the space outside the device. Other components of the speaker device, such as electrical contacts, pads, and internal wiring, are not shown in FIG. Referring to Figure 2, a method of packaging the sound absorbing material 19 is illustrated. "Sound absorbing material" (as used herein) refers to the zeolitic material disclosed in application No. 13/818,374, although other sound absorbing materials may be used as desired. As shown in section 2 along section line AA, the speaker device 10 rearward volume 17 extends around the acoustic sensor 12 and extends into the interior portion of the volume in which the sound absorbing pocket 16 is disposed. A technique for enclosing a sound absorbing material 19 in a bag is disclosed in the application Serial No. 14/003,217, the entire disclosure of which is incorporated herein by reference. As disclosed in application No. 14/003,217, the sound absorbing bag 16 is manufactured to fit the inner contour of the rear volume, and one side of the sound absorbing pocket 16 includes between the inner volume of the sound absorbing bag 16 and the inner volume of the sound absorbing pocket 16. One of the low acoustic impedance of a gas exchange is a gas permeable material. The breathable material must also retain the sound absorbing material 19 within the interior of the bag. The remaining sides of the sound absorbing pocket 16 are made of a material that is relatively breathable or has a high acoustic resistance. The sound absorbing pocket 16 is positioned such that gas exchange occurs between the sound absorbing material 19 and the rear volume 17 through the gas permeable material. Referring to FIG. 3, another method of holding the sound absorbing material 19 within the rear volume of the speaker device 10 is illustrated. As shown in section 3 along section line AA, instead of a sound absorbing pocket 16, a gas permeable wall 18 is disposed within the rear volume 17. The permeable wall 18 is held in its position within the rear volume 17 by tabs, flanges or suitable adhesive. If an adhesive is used, the adhesive preferably does not have any venting properties that can affect the sound absorbing material in the back volume and affect its ability to absorb. The gas permeable wall 18 can comprise a perforated or etched polypropylene material, a mesh material having a low acoustic resistance, a filter material, or other gas permeable material having a low acoustic resistance. As shown in FIG. 3, the sound absorbing material 19 is held in a portion of the rear volume 17 opposite the position of the acoustic sensor 12. As shown in Figures 2 and 3, gas exchange between the sound absorbing material 19 and the rear volume 17 is facilitated by a gas permeable material placed between the sound absorbing material 19 and the rear volume 17. However, as shown in Figures 2 and 3, the sound absorbing material 19 at the interface with the rear volume (i.e., in close proximity to the gas permeable material) will absorb or desorb the gas before the sound absorbing material 19 is away from the rear volume interface. Even though the sound absorbing material 19 is a particle (rather than a much smaller particle), the sound absorbing material 19 presents the acoustic resistance to the gas passing through the gas permeable material. This acoustic resistance causes the sound absorbing material 19 closest to the rear volume interface to interact more with the gas exchange, while the sound absorbers further from the gas permeable material may have less interaction. This uneven interaction in the gas exchange can cause the efficiency of the sound absorbing material 19 to decrease (if the path through the sound absorbing material is too long/too narrow). Referring to FIG. 4, an embodiment of one of the acoustic sensors 34 disposed in an acoustic chamber substantially defined by a shield 33 of an audio device and a printed circuit board 32 is depicted. In the context of this application, an audio device includes any type of electronic device having an audio function, such as playback of voice messages, music or other sound files, such as a music player, mobile phone, and the like. Since the sound absorbing material enhances the frequency response of the microphone element, an audio device having a microphone is also included. In FIG. 4, the substantially sealed acoustic chamber is comprised of a printed circuit board 32, a shroud 33 having its chamber wall 41, and a top portion interposed between the chamber wall 41 and the top portion of the printed circuit board 32. The chamber liner 37 is defined. In some embodiments, the chamber wall 41 is a continuous wall and is formed from injection molded plastic or metal. Instead of having a complete speaker unit with its own speaker housing housing and lower speaker housing housing, the embodiment shown in Figure 4 relies on a printed circuit board 32 and shroud 33 that provide a speaker housing. Typically, for this type of speaker configuration, the speaker is completed until the printed circuit board 32 and shield 33 of the audio device are engaged. The cassette 39 allows the sound to propagate to the environment outside the chamber formed by the printed circuit board 32 and the shield 33 and the chamber liner 37. Acoustic sensor 34 is electrically and mechanically coupled to printed circuit board 32 via sensor contacts 36 disposed between printed circuit board 32 and acoustic sensor 34. Solder or other conductive material may be used to electrically and mechanically couple the acoustic sensor 34 to the printed circuit board 32. Alternatively, acoustic sensor 34 may have spring contacts that are advanced against printed circuit board 32 to provide electrical continuity. Acoustic sensor 34 receives electrical signals from printed circuit board 32 via sensor contacts 36. The acoustic sensor 34 is spaced from the inner surface of the voice cassette 39 and the shield 33 by a hammer pad 38. The acoustic pad 38 divides the substantially sealed acoustic chamber into a front volume 40 and a rear volume 35. The front volume 40 is accessible through the sound cassette 39 and is bounded by the sound pad 38, the portion of the inner surface of the shield 33 in the sound pad 38, and the portion of the acoustic sensor 34 facing the hammer 39. . The substantially sealed acoustic chamber rear volume 35 is printed by the inner surface of the shield 33 outside the acoustic pad 38, the inner surface of the chamber wall 41, the chamber liner 37, and the chamber liner 37. Portions of the inner surface of circuit board 32 are delimited. Other portions of the printed circuit board 32 are mechanically coupled to the shroud 33 to compress the chamber liner 37 against the top portion of the chamber wall 41 and into the acoustic sensor 34 and shroud 33 in the region of the hammer 39. The surface compresses the sound pad 38. The compression of the chamber liner 37 and the acoustic pad 38 substantially seals the acoustic chamber of the acoustic sensor 34. As is well known, the rear volume 35 improves the operation of the acoustic sensor (which is a speaker in this example). The airflow from the rear side of the acoustic sensor 34 to the rear volume 35 during movement of the acoustic sensor 34 due to the electrical signal received through the sensor contact 36 is shown in FIG. 4 also depicts a housing 30 and a PCB housing 31 in which the housing 30 is mounted to the shield 33 and the PCB housing 31 is mounted to the printed circuit board 32. The housing 30 and the PCB housing 31 are optional components of the audio device and typically include aesthetic considerations for covering the shield 33 and the printed circuit board 32. More specifically, the shield 33 can have parting lines, fasteners, or aesthetically unpleasant processing lines, and the cover 30 can be attached to the shield 33 to mask such manufacturing errors. Similarly, PCB housing 31 is mounted on printed circuit board 32 to cover wiring, electrical traces, and other manufacturing artifacts. Referring to Figure 5, there is depicted an embodiment of an acoustic sensor 34 disposed in an acoustic chamber having a substantially sealed sound absorbing material 19, the substantially sealed acoustic chamber being comprised of a printed circuit board of an audio device 32 and shield 33 are defined. Most of the structural features of the embodiment of Figure 5 are identical to the structural features shown in Figure 4. In the embodiment shown in FIG. 5, the rear volume 35 is now comprised of a plurality of sound absorbing materials 19, an interior chamber wall 44, and within a volume defined by the interior chamber wall 44, the chamber wall 41, and the gas permeable member 43. The gas permeable member 43 of the sound absorbing material 19 occupies. The gas permeable member 43 is mechanically coupled or attached to the top portion of the chamber wall 41 and the gas permeable member attachment point 42 on the top portion of the interior chamber wall 44. The gas permeable member 43 covers only those portions of the substantially sealed acoustic chamber (i.e., the rear volume 35) that will receive the sound absorbing material 19. Other portions of the substantially sealed acoustic chamber, such as portions of the acoustic sensor located therein, will not be covered with the gas permeable member 43. This allows the acoustic sensor 34 to be repaired and replaced without removing the gas permeable member 43 or interfering with the sound absorbing material 19. The chamber liner 37 covers a portion of the gas permeable member 43 that is mechanically coupled or attached to the top portion of the chamber wall 41. Although FIG. 5 only discloses a single rear volume 35 that will include a sound absorbing material 19, it is contemplated that the rear volume 35 can include an entirely substantially sealed acoustic cavity defined by the chamber wall 41, the shroud 33, and the printed circuit board 32. Multiple chamber type areas in the room. It is further contemplated that each of the plurality of chamber type regions within the substantially sealed acoustic chamber will be a single piece from the gas permeable member 43, preferably configured to cover all of the chamber type regions. The gas permeable member 43 is covered. It is also contemplated that a plurality of gas permeable members 43 may be obtained depending on the overall design of the substantially sealed acoustic chamber defined by the chamber wall 41, the shroud 33 and the printed circuit board 32. Additionally, one of the plurality of chambers covering the sound absorbing material 19 may not cover the volume in the acoustic chamber designated by the acoustic sensor to facilitate repair or replacement of the acoustic sensor 34. As shown in Fig. 2, a sound absorbing bag 16 comprising a sound absorbing material 19 can be used in a speaker configuration of this type, wherein the speaker housing is molded as an integral part of one of the housings of an audio device. One of the limitations of the sound absorbing pocket 16 is that the corner of the rear volume 35 (as shown in Figures 4 and 5) will not have any sound material disposed therein. This is due to the manufacturing limitations inherent in the sound absorbing pocket 16. More specifically, the ninety degree angle cannot be molded into the sound absorbing pocket 16 and some margin of proper pocket placement in the rear volume 35 is also required, and therefore a small amount of rear volume 35 does not receive the sound absorbing material 19. Since the fill 吸 of the sound absorbing material 19 will be visible on the outer casing of an audio device and aesthetically not pleasing to the purchaser of the device, the other methods shown in Figure 3 will not be suitable for this type of speaker configuration, where the speaker housing Molded as or integral with one of the outer casings of the audio device. In addition, there is a danger that regular daily use of the audio device will cause the seal above the fill port to shift in place or rupture, thereby allowing the sound absorbing material to escape. The airflow from the rear side of the acoustic sensor 34 to the rear volume 35 during movement of the acoustic sensor 34 due to the receipt of an electrical signal through the sensor contact 36 is shown in FIG. During operation, the acoustic sensor 34 creates a pressure in the rear volume 35 that causes gas exchange with the sound absorbing material 19. The gas permeable member 43 promotes this gas exchange between the rear volume 35 and the sound absorbing material 19. Preferably, the sound absorbing material 19 is one of the loose zeolite particulate materials as disclosed in U.S. Patent Application Serial No. 14/818,374, the entire disclosure of which is incorporated herein by reference. More preferably, the loose zeolite particulate material (used as the sound absorbing material 19) is substantially spherical and has a diameter range of one hundred microns or more. The loose zeolite particulate material is preferred for its ease of use in making an acoustic device of the type disclosed herein. Other types of sound absorbing materials (such as zeolite powder or activated carbon) can also be used, but can be used less easily in manufacturing procedures. As is known in the art, the energy of a sound or gas passing through a material can be described along with the acoustic resistance (i.e., measured in units of MKS rayl). For the embodiment shown in Figure 5, the gas permeable member 43 should have an acoustic resistance that is one of the specified thresholds of one of the normal volume sizes (in this case, 1 cubic centimeter) behind the gas permeable member 43 (usually 260 MKS Rui). If the opening is small, selecting the material to be used as the gas permeable member 43 may cause the acoustic resistance at the opening to exceed 260 MKS, thereby resulting in poor acoustic performance. More specifically, if it exceeds 260 MKS, the gas in the rear volume is prevented from reaching the sound absorbing material 19. Therefore, if a cashmere material is selected for use as the gas permeable member 43, care must be taken not to exceed 260 MKS, especially if the limit 51 is small. For some embodiments, the cashmere material is a heterogeneous material, and more specifically, a flat layer of material made of nylon fibers having an undefined pattern. The purpose of the cashmere material is to maintain the sound absorbing material 19 and to allow the gas to interact with the sound absorbing material 19. The structure of the cashmere material and any pore size in the material renders the sound absorbing material 19 (in powder form, particulate form or granular form) unable to pass through the cashmere material. Alternatively, a mesh material can be used for the gas permeable member 43. In some embodiments, unlike cashmere materials, the surface structure and material structure of the mesh material are clearly defined. For example, a layer of web material suitable for use as the gas permeable member 43 may have a nominal thickness of 115 microns, a pore size of 130 microns, and an acoustic resistance of 8.5 MKS per square centimeter. Like the cashmere material, the purpose of the mesh material is to maintain the sound absorbing material 19 and to allow the gas to interact with the sound absorbing material 19. The structure of the web material and any pore size in the material renders the sound absorbing material 19 (in powder form, particulate form or particulate form) unable to pass through the web material. An acoustic engineer has a wider design latitude relative to the web material due to the lower acoustic resistance of the web material and a known amount. The gas permeable member 43 can be coupled to the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44 by gluing, crimping, stamping, stamping, heat sealing or preferably by ultrasonic welding. The permeable member attachment point 42. One advantage of ultrasonic welding is that a uniform and reliable adhesive is formed between the gas permeable member 43 and the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44, wherein the gas permeable member 43 is a cashmere or mesh. Shaped material. Ultrasonic welding causes the material to fuse, thereby forming a strong mechanical bond when the materials are fused together. Typically, ultrasonic welding softens the fibers in the mesh material but does not melt the fibers. Ultrasonic welding techniques ensure that the material comprising the gas permeable member 43 is fixedly secured to the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44, thereby preventing any leakage of the sound absorbing material 19 while still allowing gas and sound absorbing material 19 interactions. Another feature of the breathable member 43 for holding the sound absorbing material 19 is that the acoustic sensor 34 can be repaired or replaced without interfering with or losing the sound absorbing material 19. The secure attachment of the gas permeable member 43 to the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44 prevents the sound absorbing material 19 from escaping from its designated volume. As shown in FIG. 5, the passage between the top portion of the internal chamber wall 44 and the inner surface of the printed circuit board 32 is limited 51. The size of the limit 51 is based on the thickness of the chamber liner 37. Preferably, the thickness of the chamber liner 37 is 0.3 mm, but other thicknesses can be used to adjust the height of the limit 51. In the embodiment shown in Figure 5, the interior chamber wall 44 is formed from a solid material, preferably injection molded plastic or machined metal. In the speaker embodiment shown in Figures 2 and 3, a limited amount of surface area exposure of the sound absorbing material 19 can affect the performance of the sound absorbing material 19. More specifically, since the airflow close to the acoustic sensor is higher and the airflow at the distal end of the rear volume is lower, the sound absorption of the gas permeable material that promotes gas exchange between the sound absorbing material 19 and the rear volume is further away. The material 19 does not experience a gas flow/gas velocity that is the same as the amount of sound absorbing material 19 that is adjacent to the gas permeable member. This is due to the acoustic spring formed by the proximity of the rear volume and the sound absorbing material 19 which itself presents a certain amount of acoustic resistance to the gas propelled into the volume occupied by the sound absorbing material 19. In addition, gas exchange must flow through the restriction 51 between the top surface of the interior chamber wall 44 and the printed circuit board 32. If the acoustic resistance becomes too small, the limit 51 can also exhibit additional acoustic resistance. The embodiment shown in FIG. 5 has only the PCB housing 31, rather than the housing 30. In this embodiment, the outer surface of the shield 33 has been polished to present an aesthetically pleasing surface to the device purchaser, and thus the cover 30 is external. The PCB housing 31 is presented due to the electrical traces of the printed circuit board 32. Referring to Figure 6, there is depicted another embodiment of an acoustic sensor 34 disposed in an acoustic chamber having a substantially sealed sound absorbing material 19, the substantially sealed acoustic chamber being comprised of an audio device Printed circuit board 32 and shroud 33 are defined. Most of the structural features of the embodiment of Figure 6 are identical to the structural features shown in Figure 5. In the embodiment shown in FIG. 6, the rear volume 35 is now comprised of a plurality of sound absorbing materials 19, an interior chamber wall 44, and within the volume defined by the interior chamber wall 44, the chamber wall 41, and the gas permeable member 43. The gas permeable member 43 containing the sound absorbing material 19 occupies. The gas permeable member 43 is mechanically coupled or attached to the top portion of the chamber wall 41 and the gas permeable member attachment point 42 on the top portion of the interior chamber wall 44. The gas permeable member 43 covers only those portions of the substantially sealed acoustic chamber (i.e., the rear volume 35) that will receive the sound absorbing material 19. Other portions of the substantially sealed acoustic chamber, such as portions of the acoustic sensor 34 located therein, will not be covered with the gas permeable member 43. This allows the acoustic sensor 34 to be repaired and replaced without removing the gas permeable member 43 or interfering with the sound absorbing material 19. The chamber liner 37 covers a portion of the gas permeable member 43 that is mechanically coupled or attached to the top portion of the chamber wall 41. In the shield 33, a loading pocket 52 is shown. The loading pocket 52 is located in the bottom surface of the shroud 33 and provides a weir between the portion of the volume 35 after filling the sound absorbing material 19 and the exterior of the shroud 33. The loading cassette 52 is used to facilitate a particular technique for loading a particular type of sound absorbing material 19 into a rear volume. The loading cassette 52 is covered with a filling jaw seal 53. The filling jaw seal 53 can be made of a foil or film material and is self-adhesive. Any adhesive used in the vicinity of the sound absorbing material 19 should not adversely affect the performance of the sound absorbing material. The portion of the outer surface of the shroud 33 that is loaded with the weir 52 preferably has a countersunk cavity or ring that accommodates the filling jaw seal 53 about its diameter, and thus the loading jaw seal 53 is flush with the outer surface of the shroud 33. The size of the filling bowl is preferably at least 1.5 mm in diameter. Figure 6 depicts two loading pockets 52, one in the bottom surface of the shroud 33 and one in the chamber wall 41. In practice, only one loading cartridge 52 will be used. The location of the loading pocket 52 will depend on a number of factors, such as the design of the shield 33, the physical complexity of the volumetric region designated to include the sound absorbing material 19, and the use of other components to fill the shield 33 and interpose in the sound absorbing material 19 Manufacturing order. Unlike the embodiment shown in FIG. 5, the embodiment of FIG. 6 includes a casing 30, since the shroud 33 can have parting lines, fasteners, or aesthetically unpleasant processing lines, and The shield 33 can have a loading pocket 52 containing one of the filling seals 53 that need to be covered. Although FIGS. 5 and 6 only disclose a single rear volume 35 that will include a sound absorbing material 19, it is contemplated that the rear volume 35 can include an entire substantially sealed shape defined by the chamber wall 41, the shroud 33, and the printed circuit board 32. Multiple chamber type regions within the acoustic chamber. It is further contemplated that each of the plurality of chamber type regions within the substantially sealed acoustic chamber will be a single piece of the gas permeable member 43, preferably configured to cover all of the chamber type regions. The gas permeable member 43 is covered. It is also contemplated that a plurality of gas permeable members 43 may be obtained depending on the overall design of the substantially sealed acoustic chamber defined by the chamber wall 41, the shroud 33 and the printed circuit board 32. Additionally, one of the plurality of chambers covering the sound absorbing material 19 may not cover the volume in the acoustic chamber designated to be occupied by the acoustic sensor to facilitate repair or replacement of the acoustic sensor 34. The embodiment shown in FIG. 6 has a PCB housing 31 and a housing 30. In this embodiment, even if the outer surface of the shield 33 can be polished to present an aesthetically pleasing surface to the device purchaser, if the loading pocket 52 is positioned such that it penetrates the outer surface of the shield 33, then There is a danger that the filling jaw seal 53 can be damaged or offset in situ, and the sound absorbing material 19 can be contaminated or can leak out of the rear volume. Thus, the casing 30 protects the loading jaw seal 53 and provides an aesthetically pleasing surface to the device purchaser. The PCB housing 31 is presented due to the electrical traces of the printed circuit board 32. 7 and 8 are views of the acoustic device 30 along section line BB. Referring to Figure 7, a wall opening 50 is disposed in the interior chamber wall 44. In the wall opening 50, an upper tab 46, a side tab 45 and a lower tab 47 are provided. The tabs can be a long piece of solid material (as shown in Figure 7) or can be a series of tabs that substantially occupy the same space as the long piece of solid material shown in Figure 7. The tabs 45, 46, 47 can be injection molded plastic, machined metal or other suitable material. A gas permeable insert 48 is disposed in the wall opening 50 and is held in this position by the upper tab 46, the side tab 45 and the lower tab 47. The gas permeable insert 48 holds the sound absorbing material 19 in a chamber bounded by the chamber wall 41, the interior chamber wall 44, and the gas permeable member 43. The breathable insert 48 also extends the amount of exposed surface area of the sound absorbing material 19. Therefore, gas exchange occurs through the gas permeable member 43 and the gas permeable insert 48, thereby improving the efficiency of the sound absorbing material 19. The gas permeable insert 48 can be made of the same material as that used for the gas permeable member 43 discussed above, and should have a sound resistance in MKS ray lower than the established threshold of the gas permeable member 43. . Referring to Figure 8, another embodiment of a gas permeable insert 48 is shown. In this embodiment, a gas impermeable material is etched, stamped, or otherwise machined to have a plurality of vents 49. The venting opening 49 is sized to prevent the sound absorbing material 19 from passing through the venting opening while allowing gas exchange between the trailing volume 35 and the sound absorbing material 19 to occur. Preferably, the polypropylene foil is used to create a gas permeable insert 48. There are several reasons for the ideal material of a polypropylene foil-based breathable insert 48. Polypropylene foils do not become brittle when they age, they are highly resistant to damaging ultraviolet light, and they resist damage from several types of chemicals. In general, polypropylene foil has less than 1 gram/cm ³ One is very low density and most foils are resistant to heat up to 140 degrees Celsius. Can also use such as Kapton ^® Similar material. The vents 49 can be formed in a variety of geometries and sizes as long as the vents 49 do not exceed a predetermined acoustic resistance threshold (preferably 260 MKS). Referring to Figure 9, the embodiment illustrated herein is based on the embodiment of the interior chamber wall 44 shown in Figures 7 and 8. The chamber liner 37 has been expanded to include a portion disposed between the top portion of the interior chamber wall 44 and the printed circuit board 32. Since the wall opening 50 and the gas permeable insert 48 allow for the exchange of gas between the rear volume 35 and the sound absorbing material 19, the additional portion of the chamber liner 37 closes the acoustic path along the printed circuit board 32 and routes the gas to the wall. Opening 50. While it appears that the gas permeable member 43 is now redundant, it is still necessary to maintain the sound absorbing material 19 in its defined volume if it is desired to repair or replace the acoustic sensor 34. Referring to Figures 10A through 10B, a method for fabricating an audio device having a speaker housing as one of the integrated portions of its housing is disclosed. Preferably, although manual assembly of the audio device is also contemplated, the manufacturing method is implemented using computer control manufacturing equipment of maximum efficiency. More specifically, the description of the manufacturing process assumes that the audio device undergoing assembly has been placed in an assembly carrier that moves the audio device along an assembly track through one of a variety of computer controlled assembly stations. There may be other steps not described in the method of manufacture, such as interposing in a gasket or making an electrical connector. However, these types of steps are common to manufacturing procedures and are not part of the invention. Referring to Figures 10A and 10B, an embodiment of a method of fabricating an audio device having a speaker housing as one of the integrated portions of its housing will be described. In step S100, the shield 33 is placed in a mounting carrier and the dispensing funnel is aligned with the rear pocket 35 of the shroud 33. At this stage of the manufacturing process, the assembled audio device is positioned in a mounting carrier, and preferably, the mounting carrier assists in the alignment of the dispensing funnel with the trailing volume 35 in the shroud 33. Alternatively, the dispensing funnel can be manually aligned with the post volume 35 in the shroud 33. The purpose of the dispensing funnel is to ensure that all of the measured dose of sound absorbing material enters the post volume 35 in the shroud 33. Preferably, a zeolitic material having a substantially spherical shape is used as the sound absorbing material, and the form of the zeolitic material is preferably used to fill a closed volume of the closure shroud 33. In this phase of the manufacturing process of the acoustic device, it is assumed that no other components need to be installed in the shroud 33, except for the acoustic sensor 34. While additional components may be added after placing the sound absorbing material 19 in the post volume 35, there is a risk of interfering with or contaminating the sound absorbing material 19. In step S110, a predetermined amount of sound absorbing material is loaded to the compounding funnel. The amount of sound absorbing material that will be loaded into the shroud 33 after the volume 35 is determined based on the desired acoustic effect that the designer desires to achieve. For example, the amount of sound absorbing material deposited into the volume 35 in the shroud 33 depends on the amount by which the acoustic design engineer wishes to achieve one of the resonant displacements. The measurement of the amount of sound absorbing material 19 for insertion into the rear volume 35 in the shroud 33 is performed by volume or gravity. In step S120, the carrier of the acoustic device undergoing the dispensing is vibrated while the sound absorbing material 19 from the dispensing tank is poured into the dispensing funnel and subsequently poured into the shroud 33 to the volume 35. If the sound absorbing material 19 is in the form of powder, granules or granules, the shroud 33 is vibrated while the sound absorbing material 19 is poured through the dispensing funnel to the back volume 35 to allow the material to disperse relatively quickly and uniformly. In step S130, the carrier holding the shield 33 is stopped for a predetermined time. The stop of the vibration allows the sound absorbing material 19, which is now located inside the shroud 33, to settle inside the volume 35. The settling of the sound absorbing material 19 is important for measuring whether the post volume system has been properly filled. In step S140, the carrier holding the shield 33 is vibrated for a predetermined time. The repeated vibration of the shroud 33 during both the dispensing step and after the dispensing step ensures that the sound absorbing material 19 inside the rear volume 35 of the shroud 33 has reached all of the cavities within the rear volume 35. As previously indicated, the settling of the sound absorbing material 19 is important to measure whether the back volume 35 has been properly filled. When the second vibration of the shield 33 is over, the dispensing funnel is removed. In step S150, the level of the sound absorbing material 19 inside the volume 35 is measured after the shield 33 is placed. The measurement can be done visually. More preferably, the level measurement is performed using a laser that illuminates one of the sound absorbing materials 19. In step S160, the measurement level of the sound absorbing material 19 in the rear volume 35 is compared with the design requirements of the manufactured special shield 33. If the level of the sound absorbing material 19 is lower than the design specification, the shield 33 is rejected in step S170. If the level of the sound absorbing material 19 is within the design specifications, the manufacturing process moves to step S180. In step S180, the gas permeable member 43 is aligned with the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44 and the gas permeable member 43 is attached to the top portion and the interior chamber wall of the chamber wall 41. The top part of 44. The gas permeable member 43 holds the sound absorbing material 19 in a designated volume within the rear volume 35. As shown, the gas permeable member 43 can be coupled to the top portion of the chamber wall 41 and the interior chamber wall 44 by gluing, crimping, stamping, stamping, heat sealing, or preferably by ultrasonic welding. The gas permeable member attachment point 42 on the top portion. If an adhesive is used, the adhesive preferably does not have any venting characteristics that can affect the performance of the sound absorbing material 19 in the back volume 35. In step S190, the chamber liner 37 is aligned with the chamber wall 41 in the shroud 33. The chamber liner 37 is aligned with the chamber wall 41 in the shroud 33. As shown in Figures 5, 6, and 9, the chamber liner is supported on the top portion of the chamber wall 41 and is positioned at the chamber wall 41 that is now attached to the gas permeable member attachment point 42. Above the gas permeable member 43. At the moment of the assembly process, the acoustic sensor 34 can be placed in position in the shroud 33. Alternatively, the acoustic sensor 34 can be mechanically attached to the printed circuit board 32, and then the acoustic sensor 34 is manipulated to a position when the printed circuit board 32 is joined to the shroud 33. In step S200, the printed circuit board 32 is aligned with the shield 33 and the two components are mated together to produce a finished acoustic device. Mechanical attachment of printed circuit board 32 and shroud 33 is achieved using fasteners, adhesives and/or interlocking tabs molded into the respective components. If an adhesive is used, the adhesive preferably does not have any venting characteristics that can affect the sound absorbing material 19 in the back volume 35. Attachment of printed circuit board 32 and shroud 33 creates a sealed acoustic chamber within the outer casing of acoustic sensor 34. In step S210, the complete acoustic device is removed from the assembly carrier and the complete acoustic device is tested to determine if it meets the design requirements of the acoustic device. Referring to Figures 11A-11B, another method for fabricating an audio device having a speaker housing as one of the integrated portions of its housing is disclosed. Preferably, although manual assembly of the audio device is also contemplated, the manufacturing method is implemented using computer control manufacturing equipment of maximum efficiency. More specifically, the description of the manufacturing process assumes that the audio device undergoing assembly has been placed in an assembly carrier that moves the audio device along an assembly track through one of a variety of computer controlled assembly stations. There may be other steps not described in the method of manufacture, such as inserting a gasket or making an electrical connector. However, these types of steps are common to manufacturing procedures and are not part of the invention. Referring to Figures 11A and 11B, another embodiment of a method of manufacturing an audio device having a speaker housing as one of the integrated portions of its housing will be described. In step S300, the shield 33 is placed in an assembly carrier. At this stage of the manufacturing process, the assembled audio device is positioned in a mounting carrier, and in some embodiments of the manufacturing process, it will be necessary to align the audio devices assembled at different angles during the manufacturing process. In step S310, the gas permeable member 43 is aligned with the top portion of the chamber wall 41 and the top portion of the interior chamber wall 44 and the gas permeable member 43 is attached to the top portion and the interior chamber wall of the chamber wall 41. The top part of 44. The gas permeable member 43 holds the sound absorbing material 19 in a designated volume within the rear volume 35. As shown, the gas permeable member 43 can be coupled to the top portion of the chamber wall 41 and the interior chamber wall 44 by gluing, crimping, stamping, stamping, heat sealing, or preferably by ultrasonic welding. The gas permeable member attachment point 42 on the top portion. If an adhesive is used, the adhesive preferably does not have any venting characteristics that can affect the performance of the sound absorbing material 19 in the back volume 35. In step S320, the shroud in the assembly carrier is realigned to expose the loading cartridge 52 such that the dispensing funnel can be aligned with the loading cartridge 52. Preferably, the assembly carrier assists in the alignment of the dispensing funnel with the loading pocket 52, which will allow the sound absorbing material 19 to enter the post volume 35 in the shroud 33. Alternatively, the dispensing funnel can be manually aligned with the loading weir 52 in the shroud 33. The purpose of the dispensing funnel is to ensure that all of the measured dose of sound absorbing material 19 enters the rear volume 35 in the shroud 33. Preferably, a zeolitic material having a substantially spherical shape is used as the sound absorbing material 19, and the form of the zeolitic material is preferably used to fill a closed volume of a closure shroud 33. In this phase of the manufacturing process of the acoustic device, it is assumed that no other components need to be installed in the shroud 33, except for the acoustic sensor 34. While additional components may be added after placing the sound absorbing material 19 in the post volume 35, there is a risk of interfering with or contaminating the sound absorbing material 19. In step S330, a predetermined amount of sound absorbing material is loaded to the dispensing funnel. The amount of sound absorbing material that will be loaded into the shroud 33 after the volume 35 is determined based on the desired acoustic effect that the designer desires to achieve. For example, the amount of sound absorbing material deposited into the volume 35 in the shroud 33 depends on the amount by which the acoustic design engineer wishes to achieve one of the resonant displacements. The measurement of the amount of sound absorbing material 19 for insertion into the rear volume 35 in the shroud 33 is performed by volume or gravity. In step S340, the carrier of the acoustic device undergoing the dispensing is vibrated while the sound absorbing material 19 from the dispensing tank is poured into the dispensing funnel and subsequently poured into the shroud 33 through the loading weir 52 to the volume 35. If the sound absorbing material 19 is in the form of powder, granules or granules, the vibrating shield 33 and the enthalpy 52 are allowed to disperse relatively quickly and evenly when the sound absorbing material 19 is poured into the rear volume 35 via the dispensing funnel. In step S350, the carrier holding the shield 33 is stopped for a predetermined time. The stop of the vibration allows the sound absorbing material 19, which is now located inside the shroud 33, to settle inside the volume 35. The settling of the sound absorbing material 19 is important for measuring whether the post volume system has been properly filled. In step S360, the carrier holding the shield 33 is vibrated for a predetermined time. The repeated vibration of the shroud 33 during both the dispensing step and after the dispensing step ensures that the sound absorbing material 19 inside the rear volume 35 of the shroud 33 has reached all of the cavities within the rear volume 35. As previously indicated, the settling of the sound absorbing material 19 is important to measure whether the back volume 35 has been properly filled. When the second vibration of the shield 33 is over, the dispensing funnel is removed. In step S370, the level of the sound absorbing material 19 inside the volume 35 is measured after the shield 33 is placed. The measurement can be done visually. More preferably, the level measurement is performed using a laser that illuminates one of the sound absorbing materials 19. In step S380, the measurement level of the sound absorbing material 19 in the rear volume 35 is compared with the design requirements of the manufactured special shield 33. If the level of the sound absorbing material 19 is lower than the design specification, the shield 33 is rejected in step S390. If the level of the sound absorbing material 19 is within the design specifications, the manufacturing process moves to step S400. In step S400, the loading pocket 52 is sealed using a loading jaw seal 53. The loading jaw seal 53 can be a foil or film that is assembled to one of the plugs 52 or glued or attached to the loading pocket 52. The foil or film can be self-adhesive. In step S410, the chamber liner 37 is aligned with the chamber wall 41 in the shroud 33. As shown in Figures 5, 6, and 9, the chamber liner is supported on the top portion of the chamber wall 41 and is positioned at the chamber wall 41 that is now attached to the gas permeable member attachment point 42. Above the gas permeable member 43. At the moment of the assembly process, the acoustic sensor 34 can be placed in position in the shroud 33. Alternatively, the acoustic sensor 34 can be mechanically attached to the printed circuit board 32, and then the acoustic sensor 34 is manipulated to a position when the printed circuit board 32 is joined to the shroud 33. Next, the printed circuit board 32 is aligned with the shield 33 and the two housings are mated together to produce a finished acoustic device. Mechanical attachment of printed circuit board 32 and shroud 33 is achieved using fasteners, adhesives and/or interlocking tabs molded into the assembly. If an adhesive is used, the adhesive preferably does not have any venting characteristics that can affect the sound absorbing material 19 in the back volume 35. Attachment of printed circuit board 32 and shroud 33 creates a sealed acoustic chamber within the outer casing of acoustic sensor 34. In step S420, the complete acoustic device is removed from the assembly carrier and the complete acoustic device is tested to determine if it meets the design requirements of the acoustic device. The foregoing description of the preferred embodiment of the invention has been shown The above description is not intended to be exhaustive or to limit the invention to the precise form disclosed. The embodiments were chosen and described in order to explain the principles of the invention and the embodiments of the invention It should be noted that any entity (e.g., speaker device, etc.) disclosed herein is not limited to one of the specialized entities as described in some embodiments. Rather, the disclosed invention can be implemented in various ways and with any degree of detail at the device level while still providing the desired functionality. It should be noted that the term "comprising" does not exclude other elements or steps and "a" does not exclude the plural. Furthermore, elements that are described in connection with different embodiments may be combined. It should also be noted that the component symbols in the scope of the patent application should not be construed as limiting the scope of the patent application. While a particular embodiment of the invention has been shown and described, it is to be understood that the scope of the scope of the present invention is limited by the scope of the appended claims. In addition, the abbreviations are used only to enhance the readability of the specification and the scope of the patent application. It should be noted that the acronyms are not intended to reduce the generality of the terms used and the acronyms are not to be construed as limiting the scope of the patent application to the embodiments described therein.

10‧‧‧Speaker device

12‧‧‧Acoustic sensor

13‧‧‧Upper speaker housing

14‧‧‧ Lower speaker housing

15‧‧‧ dotted line

16‧‧‧Sound bag

17‧‧‧post volume

18‧‧‧ breathable wall

19‧‧‧ Sound absorbing materials

30‧‧‧Shell/acoustic device

31‧‧‧Printed circuit board (PCB) housing

32‧‧‧Printed circuit board

33‧‧‧Shield

34‧‧‧Acoustic sensor

35‧‧‧post volume

36‧‧‧ sensor contacts

37‧‧‧Cushion liner

38‧‧‧Acoustic pad

39‧‧‧Music

40‧‧‧Pre-volume

41‧‧‧ chamber wall

42‧‧‧ Breathable member attachment points

43‧‧‧breathable components

44‧‧‧Internal chamber wall

45‧‧‧ side tabs

46‧‧‧Upper film

47‧‧‧Under film

48‧‧‧ breathable inserts

49‧‧‧ventilation holes

50‧‧‧ wall opening

51‧‧‧Restrictions

52‧‧‧Loading

53‧‧‧Loading seals

A-A‧‧‧ section line

B-B‧‧‧ section line

S100‧‧‧ steps

S110‧‧‧Steps

S120‧‧‧ steps

S130‧‧‧Steps

S140‧‧‧Steps

S150‧‧ steps

S160‧‧‧ steps

S170‧‧‧Steps

S180‧‧‧Steps

S190‧‧ steps

S200‧‧‧ steps

S210‧‧‧Steps

S300‧‧‧ steps

S310‧‧‧Steps

S320‧‧‧Steps

S330‧‧‧Steps

S340‧‧‧Steps

S350‧‧‧ steps

S360‧‧‧Steps

S370‧‧‧Steps

S380‧‧‧Steps

S390‧‧‧Steps

S400‧‧‧Steps

S410‧‧‧Steps

S420‧‧‧ steps

The accompanying drawings, which are incorporated in FIG. In the drawings, Figure 1 is a three-quarter view of one of the speaker devices in an acoustic device; Figure 2 is a longitudinal view of one of the speaker devices of Figure 1 having a first embodiment comprising sound absorbing material Figure 3 is a longitudinal cross-sectional view of the speaker device of Figure 1 having a second embodiment comprising a sound absorbing material; Figure 4 is a longitudinal cross-sectional view of one of the acoustic devices, wherein the acoustic device is protected The cover and a printed circuit board provide an acoustic chamber enclosing the acoustic sensor; FIG. 5 is a longitudinal cross-sectional view of one of the acoustic devices, wherein a shield of the acoustic device and a printed circuit board provide an acoustic cavity enclosing the acoustic sensor And a sound absorbing material according to a first embodiment of the present invention; FIG. 6 is a longitudinal cross-sectional view of an acoustic device, wherein a shield of the acoustic device and a printed circuit board provide an acoustic chamber enclosing the acoustic sensor And a sound absorbing material according to a second embodiment of the present invention; Fig. 7 is a cross-sectional view showing a first embodiment of an inner chamber wall according to the present invention; Fig. 8 is an internal chamber wall according to the present invention. A cross-sectional view of a second embodiment; FIG. 9 is a longitudinal cross-sectional view of an acoustic device, wherein a shield and a printed circuit board provide an acoustic chamber enclosing an acoustic sensor and in accordance with the present invention A sound absorbing material of a third embodiment; FIG. 10A and FIG. 10B are flowcharts of a process for manufacturing an acoustic device, wherein a shield of the acoustic device and a printed circuit board provide an acoustic chamber for enclosing the acoustic sensor And a sound absorbing material according to an embodiment of the present invention; and FIGS. 11A and 11B are flowcharts of a process for manufacturing an acoustic device, wherein a shield of the acoustic device and a printed circuit board provide a sealed acoustic sensor Acoustic chamber and sound absorbing material according to an embodiment of the invention. Those skilled in the art should understand that the components in the figures are only simple and concise. We should further understand that certain actions and/or steps may be described or depicted in a particular order, and that the skilled artisan should understand that the particularity of the order is not actually necessary. It is also to be understood that the terms and expressions used herein have the ordinary meaning of the terms and expressions and the scope of their respective corresponding

Claims (20)

An outer casing for a mobile device, comprising: a printed circuit substrate; a shield configured to cooperate with the printed circuit substrate to produce the outer casing of the mobile device, wherein the shield comprises: a cavity a chamber wall defining a substantially sealed acoustic chamber when engaged with an inner surface of the printed circuit substrate; an acoustic sensor disposed within the acoustic chamber; an acoustical acoustically coupled to the acoustic a sensor; an interior chamber wall disposed within the acoustic chamber and defining a rear volume; a plurality of sound absorbing materials disposed within the rear volume; and a gas permeable member mechanically coupled thereto A top portion of one of the chamber walls and a top portion of the inner chamber wall, wherein the gas permeable member retains the sound absorbing material in a defined volume within the acoustic chamber. The outer casing of the mobile device of claim 1, wherein the gas permeable member has a low acoustic resistance and comprises one or more of a cashmere material or a mesh material. The outer casing of the mobile device of claim 2, wherein the aperture of the material of the gas permeable member is adapted to be smaller than the size of the sound absorbing particles. The outer casing of the mobile device of claim 1, wherein the gas permeable member is mechanically attached to the top portion of the chamber wall by gluing, crimping, stamping, stamping, heat sealing or ultrasonic welding. And the top portion of the inner chamber wall. An outer casing of the mobile device of claim 1, further comprising a chamber liner interposed between the printed circuit substrate and the top portion of the chamber wall, wherein a thickness of the chamber liner is determined by It promotes the size of one of the gas exchange limits. An outer casing of a mobile device of claim 1, further comprising a sound pad inserted between the acoustic sensor and the sound placed in the shield, wherein the sound pad is from the rear The volume is sealed to seal the front volume. The outer casing of the mobile device of claim 1, wherein the rear volume portion of the acoustic chamber is partially filled with substantially spherical zeolite-based sound absorbing particles having a minimum diameter of at least 300 microns. A housing for a mobile device, comprising: a first housing component, the first housing component comprising a printed circuit board having an acoustic sensor electrically and mechanically coupled to the printed circuit board; a housing member mechanically coupled to the first housing member to form the housing of the mobile device, wherein the second housing member includes: a continuous vertical member that engages the printed circuit board of the first housing member Defining a substantially sealed acoustic chamber; a sound cartridge disposed to be acoustically coupled to one of the acoustic sensor sensor spaces; an internal vertical member disposed in the acoustic chamber and continuous with the acoustic chamber Vertical elements intersect to define a back volume; a plurality of sound absorbing particles disposed within the back volume; and a sound permeable material mechanically coupled to a top portion of the continuous vertical member and the internal vertical member a top portion, wherein the sound permeable material holds the sound absorbing particles in a defined space within the acoustic chamber; wherein the acoustic sensor is at the first Shell member and said second housing element are coupled together occupy the space of the sensor. The outer casing of the mobile device of claim 8, wherein the rear volume portion of the acoustic chamber is partially filled with a zeolite-based sound absorbing particle having substantially spherical particles having a minimum diameter of at least 200 microns. The outer casing of the mobile device of claim 8, wherein the rear volume portion of the acoustic chamber is partially filled with a zeolite-based sound absorbing particle having substantially spherical particles having a minimum diameter of at least 350 microns. A housing for a mobile device of claim 8, further comprising a chamber liner interposed between the printed circuit board and the top portion of the continuous vertical member, wherein a thickness of the chamber liner is determined by It promotes the size of one of the gas exchange limits. The outer casing of the mobile device of claim 8, wherein the sound permeable material is mechanically attached to the top portion of the continuous vertical member and the top portion of the inner vertical member by adhesive or ultrasonic welding. The outer casing of the mobile device of claim 8, wherein the inner vertical member includes an opening configured to facilitate gas exchange of the sound absorbing particles, wherein the opening comprises substantially the same as being mechanically coupled to the continuous vertical a material of the acoustic resistance of the sound permeable material of the top portion of the component and the top portion of the inner vertical component. The outer casing of the mobile device of claim 13, wherein the material disposed in the opening of the inner vertical member comprises one or more of a cashmere material or a mesh material. The outer casing of the mobile device of claim 8, wherein the inner vertical member includes an opening configured to facilitate gas exchange of the sound absorbing particles, wherein the opening includes having a different electrical coupling than the continuous vertical member One of the acoustic resistance of the top portion and the top portion of the inner vertical member. An outer casing of a mobile device of claim 15, wherein the material disposed in the opening of the inner vertical member comprises a gas permeable material comprising a size sized to retain the sound absorbing particles in the rear volume A plurality of apertures in a defined area. An outer casing of a mobile device of claim 8, further comprising a sound pad inserted between the acoustic sensor and the sound placed in the second outer casing member, wherein the sound pad is Configuring to seal the hammer from the rear volume when the first outer casing element is engaged with the second outer casing element. A housing for a mobile device, comprising: a first housing component, the first housing component comprising a printed circuit board having an acoustic sensor electrically and mechanically coupled to the printed circuit board; a housing component mechanically coupled to the first housing component to form the housing of the mobile device, wherein the second housing component comprises: a continuous vertical component on the printed circuit board with the first housing component When engaged, defining a substantially sealed acoustic chamber; a sound cartridge disposed to be acoustically coupled to one of the acoustic sensor sensor spaces; an internal vertical member disposed in the acoustic chamber, and Intersecting the continuous vertical member to define a rear volume, wherein the inner vertical member further comprises: an opening configured for gas exchange; and a low acoustic resistance insert that completely covers the opening; a plurality of sound absorbing particles Disposed within the rear volume; and a sound transmissive material mechanically coupled to a top portion of the continuous vertical member and the inner vertical element a top portion, wherein the sound permeable material holds the sound absorbing particles in a defined space within the acoustic chamber; and a chamber liner interposed on the printed circuit board and the top of the continuous vertical member And between the portion and the top portion of the inner vertical member; wherein the acoustic sensor occupies the sensor space when the first outer casing member and the second outer casing member are coupled together. The outer casing of the mobile device of claim 18, wherein the low acoustic resistance insert and the sound permeable material in the inner vertical member each comprise one or more of a cashmere material or a mesh material. The outer casing of the mobile device of claim 18, wherein the rear volume portion of the acoustic chamber is partially filled with one of substantially spherical particles having a minimum diameter of at least 300 microns and a maximum diameter of 900 microns Base sound absorbing particles.