Electronic equipment equipped with microphone module
By integrating porous sound-absorbing materials within the microphone module's sound channel, the microphone's frequency response is improved, widening the bandwidth and reducing tuning difficulty, while also enhancing signal quality and protecting against dust ingress.
Patent Information
- Application Number
- CN202422355023.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The channel design of existing microphone modules is narrow and long, resulting in poor frequency response performance, low formant peak, narrow bandwidth, increasing debugging difficulty, and affecting the use effect.
A sound absorbing piece with a porous structure is provided in the channel of the microphone module, such as zeolite powder blocks or powder bags, to expand the channel width, optimize the channel structure, and reduce the impact of the airflow.
It improves the frequency response form factor peak frequency of the microphone, expands bandwidth, reduces debugging difficulty, improves signal-to-noise ratio, and has dust-proof functions to optimize the use effect.
Smart Images
Figure CN223110136U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sound-electricity conversion equipment, in particular to an electronic device equipped with a microphone module. Background Art
[0002] The function of sound collection on consumer electronic devices is realized by a miniature microphone placed in the device. Sound enters through the microphone sound inlet opening on the device housing, acts on the diaphragm of the microphone through the sound channel structure, and is converted into an electrical signal to be collected by the device.
[0003] In the design of existing microphone modules, due to the need to consider factors such as anti-misinsertion and strong air pressure and airflow impacts, some bends and buffer zone structures are designed in the sound channels within the microphone module. At the same time, dust and dirt prevention and the aesthetics of the device housing also need to be considered, so the sound inlet channel (sound channel structure) of the microphone will not be made particularly wide. Therefore, the current sound channel design in the microphone module makes the entire channel relatively narrow and long, and with the addition of a buffer zone, the volume of the entire channel further increases, which makes the frequency response performance of the microphone worse, the frequency of the resonance peak will be on the low side, the bandwidth of the microphone becomes narrower, increasing the debugging difficulty of the microphone and affecting the actual use effect of the microphone. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an electronic device equipped with a microphone module, which can improve the frequency response resonance peak frequency point of the microphone, expand the bandwidth of the microphone, improve the signal-to-noise ratio, and optimize the use effect.
[0005] The above object of the utility model is mainly achieved by the following technical solutions:
[0006] The utility model provides an electronic device equipped with a microphone module, which includes:
[0007] A housing;
[0008] A microphone fixed on the housing;
[0009] A sound inlet hole opened on the housing;
[0010] A sound channel connecting the microphone and the sound inlet hole, the sound channel is located inside the housing, and a sound-absorbing member with a porous structure is provided in at least part of the space between the diaphragm of the microphone and the sound inlet hole of the sound channel.
[0011] In a preferred embodiment of the utility model, the sound-absorbing member is arranged in the sound channel along the extending direction of the sound channel, the outer wall of the sound-absorbing member is attached to the inner wall of the sound channel, the sound channel is separated by the sound-absorbing member into a front sound channel and a rear sound channel, and the front sound channel and the rear sound channel are connected through the porous structure on the sound-absorbing member.
[0012] In a preferred embodiment of the present utility model, the sound channel includes a plurality of sub - sound channels connected in sequence, and the sound - absorbing member is disposed in at least one of the sub - sound channels.
[0013] In a preferred embodiment of the present utility model, the sound - absorbing member is a powder block containing zeolite material; or the sound - absorbing member is a powder packet wrapped with sound - absorbing particles.
[0014] In a preferred embodiment of the present utility model, the sound - absorbing member is disposed on a part of the inner wall of the sound channel, and the cross - sectional dimension of the sound - absorbing member is smaller than that of the sound channel without separating the sound channel.
[0015] In a preferred embodiment of the present utility model, the sound - absorbing member is adhesively fixed or snap - fixed on the inner wall of the sound channel.
[0016] In a preferred embodiment of the present utility model, a dust - proof net is provided on the side of the diaphragm of the microphone facing the sound channel.
[0017] In a preferred embodiment of the present utility model, the sound - absorbing member is disposed on the side of the diaphragm of the microphone facing the sound channel to separate the microphone and the sound channel.
[0018] In a preferred embodiment of the present utility model, the sound channel includes a plurality of sub - sound channels connected in sequence, the sound - absorbing member is disposed at the connection of two adjacent sub - sound channels, the cross - sectional dimension of the sound - absorbing member is larger than that of the sound channel, and the sound channel is separated into a front sound channel and a rear sound channel. The front sound channel and the rear sound channel are connected through the porous structure on the sound - absorbing member.
[0019] In a preferred embodiment of the present utility model, a buffer area connected to the sound channel is further provided in the housing.
[0020] In a preferred embodiment of the present utility model, the sound - absorbing member is a powder sheet including zeolite material.
[0021] Compared with the prior art, the technical solution of the present utility model has the following features and advantages:
[0022] 1. By arranging a sound - absorbing member (powder block or powder sheet) with a porous structure in the sound channel, the frequency - response resonance peak of the microphone is shifted backward, the peak height is reduced, a wider frequency band is brought, the debugging difficulty is reduced, and the use effect of the microphone is improved.
[0023] 2. The porous structure in the sound - absorbing member can slow down the airflow impact, optimize the sound - channel structure, and improve the signal - to - noise ratio of the microphone.
[0024] 3. In some application modes, the porous component has the function of blocking dust and foreign objects, and can be used to replace the function of the dustproof net. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:
[0026] The drawings described herein are only for the purpose of explanation and are not intended to limit the scope of the disclosure of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically limiting the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention under the teaching of the present invention.
[0027] Figure 1 Schematic structural diagram of an electronic device equipped with a microphone module in the prior art;
[0028] Figure 2 Schematic structural diagram of the first embodiment of the electronic device equipped with a microphone module according to the present invention;
[0029] Figure 3 Schematic structural diagram of the second embodiment of the electronic device equipped with a microphone module according to the present invention;
[0030] Figure 4 Schematic structural diagram of the third embodiment of the electronic device equipped with a microphone module according to the present invention;
[0031] Figure 5 Schematic structural diagram of the fourth embodiment of the electronic device equipped with a microphone module according to the present invention;
[0032] Figure 6 Effect comparison diagram of the frequency response curves of electronic devices equipped with microphone modules of different structures.
[0033] Explanation of the reference numerals:
[0034] Prior art:
[0035] 001. Microphone; 002. PCB board; 003. Dustproof net; 004. Housing; 005. Sound inlet hole; 006. Sound channel; 007. Buffer zone;
[0036] The present utility model:
[0037] 10. Microphone; 11. PCB board; 12. Dust-proof net;
[0038] 20. Housing; 21. Sound inlet hole;
[0039] 30. Sound channel; 31. Front sound channel; 32. Rear sound channel; 33. Buffer zone;
[0040] 40. Sound-absorbing member. Detailed implementation manner
[0041] In order to enable those skilled in the art of the present technology to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0042] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.
[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0044] As Figures 2 to 5 shown, the present utility model provides an electronic device equipped with a microphone module, which includes: a housing 20; a microphone 10 fixed on the housing 20; a sound inlet hole 21 opened on the housing 20; a sound channel 30 connecting the microphone 10 and the sound inlet hole 21, the sound channel 30 is located inside the housing 20, and a sound-absorbing member 40 with a porous structure is provided in at least part of the space of the sound channel 30 between the diaphragm of the microphone 10 and the sound inlet hole 21.
[0045] For the electronic device equipped with a microphone module according to the present utility model, a sound-absorbing member 40 (powder block or powder packet) with a porous structure is provided in the sound channel 30, so that the width of the sound channel 30 is virtually increased, thereby shifting the resonance peak of the frequency response of the microphone 10 backward, reducing the peak height, bringing a wider frequency band, reducing the debugging difficulty, and improving the use effect of the microphone 10.
[0046] For the electronic device equipped with a microphone module according to the present utility model, the porous structure in the sound-absorbing member 40 can slow down the impact of air flow, optimize the structure of the sound channel 30, and improve the signal-to-noise ratio of the microphone 10.
[0047] First, as Figure 1 shown, it shows a conventional electronic device equipped with a microphone module in the prior art, which includes a microphone 001. The microphone 001 is fixed on a housing 004 through a PCB board 002. An acoustic inlet hole 005 is provided on the housing 004. The acoustic inlet hole 005 is communicated with the diaphragm of the microphone 001 through a sound channel 006 opened in the housing 004. In order to prevent misinsertion and the impact of strong air pressure, a buffer area 007 is provided on the sound channel 006; in order to prevent dust and other impurities from entering the microphone 001, a dust-proof net 003 is provided on one side of the diaphragm of the microphone 001. Since the current sound channel 006 is usually designed to be narrow and long for various considerations, the frequency response performance of the microphone 001 becomes poor, the frequency where the resonance peak is located is relatively low, the bandwidth of the microphone 001 becomes narrow, the debugging difficulty of the microphone 001 increases, and the actual use effect of the microphone 001 is affected.
[0048] The technical solution provided by the present utility model, in which a sound-absorbing member 40 with a porous structure is provided in a partial space of the sound channel 30, can well solve the above problems, as follows:
[0049] The electronic device equipped with a microphone module has a housing 20. The housing 20 serves as the main frame of the module. It can be formed by buckling an upper cover body and a lower cover body, or can be processed by an injection molding process in an integral structure.
[0050] A microphone 10 is provided on the housing 20. The microphone 10 is fixed on the housing 20 through a PCB board 11. The side of the microphone 10 facing the housing 20 has a diaphragm. A sound channel 30 is formed in the housing 20. One end of the sound channel 30 is communicated with the diaphragm of the microphone 10, and the other end of the sound channel 30 passes through the side wall of the housing 20 to form an acoustic inlet hole 21. External sound enters the sound channel 30 through the acoustic inlet hole 21 and is conducted to the diaphragm of the microphone 10, thereby realizing the conversion of sound signals into electrical signals.
[0051] Further, in order to improve the usage effect of the microphone 10, a sound-absorbing member 40 is disposed in a partial space within the sound channel 30. The sound-absorbing member 40 has a porous structure inside. Through this porous structure, the width of the sound channel 30 is virtually increased, so that the frequency response resonance peak of the microphone 10 is shifted backward, the peak height is reduced, and a wider frequency band is brought about.
[0052] As Figure 6 shown, it shows the test results of the structures in Figure 1 and Figure 2 . The solid line in Figure 6 corresponds to the test results of the electronic device equipped with the microphone module in Figure 1 , and the dashed line in Figure 6 corresponds to the test results of the electronic device equipped with the microphone module in Figure 2 . It can be seen that after combining with the porous sound-absorbing material, the high-frequency resonance peak of the frequency response curve of the microphone 10 is significantly shifted backward and the sharp peak becomes gentler. The backward shift of the resonance peak makes the effective bandwidth of the microphone 10 wider; the gentler sharp peak makes the later debugging of the microphone 10 easier.
[0053] For Figure 1 and Figure 2 , a signal-to-noise ratio test is carried out on the structures therein, and the results are shown in Table 1 below. The blank control group has the same structure as Figure 1 , but without the porous sound-absorbing material assembled.
[0054]
[0055]
[0056] Table 1
[0057] The following will further elaborate in detail on the structure and technical effects of the preferred embodiment of the electronic device equipped with the microphone module according to the present invention.
[0058] According to an embodiment of the present invention, as Figure 2 shown, along the extending direction of the sound channel 30, the sound-absorbing member 40 is disposed within a length range in the sound channel 30. The outer wall of the sound-absorbing member 40 is attached to the inner wall of the sound channel 30. The sound channel 30 is separated by the sound-absorbing member 40 into a front sound channel 31 and a rear sound channel 32. The front sound channel 31 and the rear sound channel 32 are connected through the porous structure on the sound-absorbing member 40.
[0059] Specifically, in this embodiment, along the extending direction of the sound channel 30, a space with a suitable length range is selected, and then the sound-absorbing member 40 is arranged within the selected space. Without considering the porous structure within the sound-absorbing member 40, the sound-absorbing member 40 arranged within this length range can divide the sound channel 30 into a front sound channel 31 and a rear sound channel 32. Among them, the front sound channel 31 is connected to the sound inlet hole 21, and the rear sound channel 32 is connected to the diaphragm of the microphone 10. Since the sound-absorbing member 40 has a porous structure, therefore, the front sound channel 31 and the rear sound channel 32 are also connected. The arrangement of the sound-absorbing member 40 will not significantly affect the original sound collection function of the microphone 10.
[0060] Preferably, as Figure 2 shown, the sound channel 30 includes a plurality of sub-sound channels connected in sequence, and the sound-absorbing member 40 is arranged in at least one sub-sound channel. In this embodiment, the sound channel 30 includes four sub-sound channels connected in sequence. Among them, the first sub-sound channel is connected to the sound inlet hole 21 and extends in the horizontal direction, the third sub-sound channel also extends in the horizontal direction, the second sub-sound channel is inclined and connects the first sub-sound channel and the third sub-sound channel, and the fourth sub-sound channel extends in the vertical direction and connects the third sub-sound channel and the diaphragm of the microphone 10; the sound-absorbing member 40 is arranged in the third sub-sound channel, thereby dividing the sound channel 30 into a front sound channel 31 and a rear sound channel 32. Among them, the first sub-sound channel and the second sub-sound channel form the front sound channel 31, and the fourth sub-sound channel forms the rear sound channel 32.
[0061] Furthermore, Figure 2 in the embodiment shown, the sound-absorbing member 40 is a powder block containing zeolite material; the zeolite material is a conventional sound-absorbing material in the field, and it has a microporous structure inside. Specifically, the powder block can be a zeolite block cut from a large piece of zeolite and adapted to the cross-section of the sound channel 30, or a block structure formed by arranging zeolite powder in fibers and adapted to the cross-section of the sound channel 30. In other embodiments of this embodiment, the sound-absorbing member 40 is a powder bag wrapped with sound-absorbing particles, and the filling in the powder bag can select common sound-absorbing particles in the prior art, such as zeolite particles.
[0062] In Figure 2 the embodiment shown, since the sound-absorbing member 40 can simultaneously play the role of expanding the bandwidth and blocking impurities, there is no need to set a corresponding buffer zone 33 on the sound channel 30, nor is there a need to set a dust-proof net 12 on the microphone 10.
[0063] According to an embodiment of the present invention, as Figure 3 shown, the sound-absorbing member 40 is arranged on a part of the inner wall of the sound channel 30, and the cross-sectional dimension of the sound-absorbing member 40 is smaller than the cross-sectional dimension of the sound channel 30 and does not produce a separating effect on the sound channel 30.
[0064] Specifically, in this embodiment, the sound-absorbing member 40 is fixed to the inner wall of the sound channel 30 by bonding or clamping. The cross-sectional dimension of the sound-absorbing member 40 is smaller than that of the sound channel 30, that is, the sound-absorbing member 40 is only provided in a partial area of the cross-section of the sound channel 30 and will not partition the sound channel 30. It is equivalent to bonding a layer of sound-absorbing material on a partial side wall of the sound channel 30, while ensuring that there is a directly connected channel between the diaphragm of the microphone 10 and the sound inlet hole 21. In other words, as Figure 3 shown, the sound-absorbing member 40 is provided on one inner wall of the sound channel 30, and there is a gap between the sound-absorbing member 40 and the inner wall of the opposite side of the sound channel 30.
[0065] Furthermore, Figure 3 in the embodiment shown, the sound-absorbing member 40 is a powder sheet containing zeolite material; the zeolite material is a conventional sound-absorbing material in the art and has a microporous structure inside. Specifically, the powder sheet is a sheet structure formed by arranging zeolite powder in fibers.
[0066] Preferably, in Figure 3 the embodiment shown, since the sound-absorbing member 40 attached to the inner wall of the sound channel 30 does not have a blocking effect, a dust-proof net 12 is provided on the side of the diaphragm of the microphone 10 facing the sound channel 30. The dust-proof net 12 has the function of blocking dust and foreign objects, and prevents impurities from entering the microphone 10 through the sound inlet hole 21.
[0067] According to an embodiment of the present invention, as Figure 4 shown, the sound-absorbing member 40 is provided on the side of the diaphragm of the microphone 10 facing the sound channel 30 for partitioning the microphone 10 and the sound channel 30. Using the sound-absorbing member 40 to replace the original dust-proof net 12 on the microphone 10 can further block foreign impurities from entering the microphone assembly.
[0068] Furthermore, Figure 4 in the embodiment shown, the sound-absorbing member 40 is a powder sheet containing zeolite material; the zeolite material is a conventional sound-absorbing material in the art and has a microporous structure inside. Specifically, the powder sheet is a sheet structure formed by arranging zeolite powder in fibers.
[0069] Preferably, Figure 4 in the embodiment shown, the thickness of the sound-absorbing member 40 is relatively thin. Although it can play a role in blocking impurities, the effect of improving the performance of the microphone 10 is limited. Therefore, a buffer area 33 still needs to be provided on the sound channel 30; in this embodiment, the buffer area 33 is provided at the connection transition position between the second sub-sound channel and the third sub-sound channel, and the buffer area 33 can serve as an extension of one end of the third sub-sound channel.
[0070] According to an embodiment of the present invention, as Figure 5As shown, the sound channel 30 includes a plurality of sub - sound channels connected in sequence. The sound - absorbing member 40 is arranged at the connection of two adjacent sub - sound channels. The cross - sectional dimension of the sound - absorbing member 40 is larger than that of the sound channel 30, so that the sound channel 30 is divided into a front sound channel 31 and a rear sound channel 32. The front sound channel 31 and the rear sound channel 32 are connected through the porous structure on the sound - absorbing member 40.
[0071] Specifically, the sound - absorbing member 40 is arranged at the connection position between the second sub - sound channel and the third sub - sound channel. The sound - absorbing member 40 is fixed at the above - mentioned connection transition position by bonding or clamping. The sound - absorbing member 40 can play a role in blocking external impurities, so there is no need to set a dust - proof net 12 on the microphone 10.
[0072] Furthermore, Figure 5 In the shown embodiment, the sound - absorbing member 40 is a powder sheet containing zeolite material; the zeolite material is a conventional sound - absorbing material in the field, and it has a microporous structure inside. Specifically, the powder sheet is a sheet structure formed by setting zeolite powder in fibers.
[0073] Preferably, Figure 5 In the shown embodiment, the thickness of the sound - absorbing member 40 is relatively thin. Although it can play a role in blocking impurities, the effect of improving the performance of the microphone 10 is limited. Therefore, it is still necessary to set a buffer zone 33 on the sound channel 30.
[0074] In the above - mentioned specific embodiments, the purpose, technical solution and beneficial effects of the present utility model are further described in detail. It should be understood that the above - mentioned are only specific embodiments of the present utility model, and are not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. An electronic device equipped with a microphone module, characterized in that, Comprising: A housing (20); A microphone (10) fixed to the housing (20); An acoustic inlet hole (21) formed in the housing (20); An acoustic channel (30) connecting the microphone (10) and the acoustic inlet hole (21), the acoustic channel (30) being located inside the housing (20), and a sound-absorbing member (40) having a porous structure is provided in at least a part of the space of the acoustic channel (30) between the diaphragm of the microphone (10) and the acoustic inlet hole (21).
2. The electronic device equipped with a microphone module according to claim 1, wherein, The sound-absorbing member (40) is disposed in the acoustic channel (30) along the extending direction of the acoustic channel (30), the outer wall of the sound-absorbing member (40) is attached to the inner wall of the acoustic channel (30), the acoustic channel (30) is separated by the sound-absorbing member (40) into a front acoustic channel (31) and a rear acoustic channel (32), and the front acoustic channel (31) and the rear acoustic channel (32) are connected through the porous structure on the sound-absorbing member (40).
3. The electronic device equipped with a microphone module according to claim 2, characterized in that, The acoustic channel (30) includes a plurality of sub-acoustic channels connected in sequence, and the sound-absorbing member (40) is provided in at least one of the sub-acoustic channels.
4. The electronic device equipped with a microphone module according to claim 2 or 3, characterized in that, The sound-absorbing member (40) is a powder block containing zeolite material; or the sound-absorbing member (40) is a powder packet wrapped with sound-absorbing particles.
5. The electronic device equipped with a microphone module according to claim 1, wherein The sound-absorbing member (40) is provided on a part of the inner wall of the acoustic channel (30), and the cross-sectional dimension of the sound-absorbing member (40) is smaller than the cross-sectional dimension of the acoustic channel (30) without causing a separating effect on the acoustic channel (30).
6. The electronic device equipped with a microphone module according to claim 5, wherein, The sound-absorbing member (40) is adhesively fixed or snap-fixed to the inner wall of the acoustic channel (30).
7. The electronic device equipped with a microphone module according to claim 5, characterized in that, A dust-proof net (12) is provided on the side of the diaphragm of the microphone (10) facing the acoustic channel (30).
8. The electronic device equipped with a microphone module according to claim 1, characterized in that, The sound-absorbing member (40) is provided on the side of the diaphragm of the microphone (10) facing the acoustic channel (30) to separate the microphone (10) and the acoustic channel (30).
9. The electronic device equipped with a microphone module according to claim 1, wherein, The acoustic channel (30) includes a plurality of sub-acoustic channels connected in sequence, the sound-absorbing member (40) is provided at the connection between two adjacent sub-acoustic channels, the cross-sectional dimension of the sound-absorbing member (40) is larger than the cross-sectional dimension of the acoustic channel (30) to separate the acoustic channel (30) into a front acoustic channel (31) and a rear acoustic channel (32), and the front acoustic channel (31) and the rear acoustic channel (32) are connected through the porous structure on the sound-absorbing member (40).
10. The electronic device equipped with a microphone module according to claim 8 or 9, characterized in that, A buffer zone (33) communicating with the acoustic channel (30) is further provided inside the housing (20).
11. The electronic device equipped with a microphone module according to any one of claims 5-9, characterized in that, The sound-absorbing member (40) is a powder sheet including zeolite material.