Microphone module
By designing multiple pickup channels and sealed filters in the microphone module, the problem of wind noise affecting automotive external microphone modules under harsh conditions was solved, achieving stable pickup performance and cost control.
Patent Information
- Application Number
- CN202520607925.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Existing automotive external microphone modules are susceptible to wind noise under harsh conditions, and the windproof cotton fails after absorbing water or getting dirty, resulting in unstable sound pickup.
Design a microphone module with a multi-channel pickup structure, including a first housing and a second housing sealed therewith. The pickup channels are connected to the microphone's pickup hole and the module's pickup hole. The channels are arranged vertically or parallel to each other, and a sealed filter is used to reduce wind noise.
It effectively reduces the impact of airflow on microphone pickup during vehicle movement, ensuring sound pickup quality. The structure is simplified and the cost is controllable, making it suitable for different installation locations.
Smart Images
Figure CN223978720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a microphone module. Background Technology
[0002] As cars become more intelligent, people have higher requirements for voice interaction. Furthermore, autonomous driving has increased the demand for external sound pickup. To meet these demands, microphone modules need to be installed on the outside of the car. These external microphone modules operate under harsher conditions. In addition to being waterproof and dustproof, they also need to avoid the impact of wind noise on sound pickup when the car is running at high speed.
[0003] Existing technical solution: The external microphone module of current automobiles uses a combination of windproof cotton and dustproof net to reduce the impact of wind noise on microphone pickup, but the effect is limited, and in bad weather, the windproof cotton will cause the entire microphone pickup function to fail due to water absorption or dirt. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a microphone module.
[0005] The purpose of this utility model is achieved through the following technical measures: a microphone module, including a first housing, a circuit board containing a microphone is provided inside the first housing, and a second housing sealed to the first housing, characterized in that: the second housing is provided with at least two pickup channels, each pickup channel is connected, one end of one pickup channel is connected to the pickup hole of the module, and the other end is connected to the outside of the module; one end of one pickup channel is connected to the pickup hole of the microphone, and the other end is connected to the other pickup channel.
[0006] As an improvement, the second housing is provided with two pickup channels, a first pickup channel and a second pickup channel. One end of the first pickup channel is connected to the pickup hole of the module, and the other end is connected to the outside of the module. One end of the second pickup channel is connected to the pickup hole of the microphone, and the other end is connected to the first pickup channel.
[0007] As a further improvement, the first pickup channel is positioned perpendicular to the second pickup channel.
[0008] As a further improvement, the second housing is provided with three pickup channels: a first pickup channel, a second pickup channel, and a third pickup channel. One end of the first pickup channel is connected to the pickup hole of the module, and the other end is connected to the outside of the module. One end of the third pickup channel is connected to the first pickup channel, and the other end of the third pickup channel is connected to the outside of the module. One end of the second pickup channel is connected to the pickup hole of the microphone, and the other end is connected to the third pickup channel.
[0009] As a further improvement, the first pickup channel and the second pickup channel are arranged in parallel.
[0010] As a further improvement, the first pickup channel is arranged perpendicularly to the third pickup channel.
[0011] As a further improvement, the diameter of the end of the first pickup channel connected to the pickup hole of the module is less than or equal to the diameter of the other end.
[0012] As a further improvement, a sealing filter is provided between the circuit board and the second housing.
[0013] As a further improvement, the sealed filter element is a foam mesh.
[0014] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are:
[0015] The pickup channel structure described in this utility model ensures that airflow will not interfere with the microphone module's sound pickup during vehicle operation, minimizing the impact of wind noise on the microphone's sound pickup effect. Furthermore, the pickup channel structure described in this utility model is flexible in its arrangement and can be installed at the front, side (such as rearview mirrors), or rear of the vehicle, simplifying the structure and facilitating cost control.
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0017] Appendix Figure 1 This is a structural schematic diagram of the utility model;
[0018] Appendix Figure 2 This is an exploded structural diagram of the utility model;
[0019] Appendix Figure 3 This is a structural schematic diagram of Embodiment 1;
[0020] Appendix Figure 4 This is a structural schematic diagram of Embodiment 2;
[0021] Appendix Figure 5 This is a schematic diagram of different positions of the pickup channel in Embodiment 2;
[0022] Appendix Figure 6 This is a schematic diagram of the structure of Embodiment 3. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0027] Example 1: As shown in the attached document Figure 3 As shown, a microphone module includes a first housing 1, a circuit board 2 containing a microphone 5 inside the first housing 1, and a second housing 3 sealed to the first housing 1. A sealing filter 4, which is a foam mesh, is provided between the circuit board 2 and the second housing 3.
[0028] The circuit board 2 containing the microphone is soldered to the first housing 1, which is integrally injection molded, to enable communication with the vehicle. The foam mesh is attached to the circuit board 2 to achieve sealing and dust and water resistance between it and the second housing 3.
[0029] The second housing 3 is provided with two sound pickup channels, a first sound pickup channel 31 and a second sound pickup channel 32. One end of the first sound pickup channel 31 is connected to the sound pickup hole 6 of the module, and the other end is connected to the outside of the module. One end of the second sound pickup channel 32 is connected to the sound pickup hole 51 of the microphone, and the other end is connected to the first sound pickup channel 31. The first sound pickup channel 31 and the second sound pickup channel 32 are arranged perpendicularly.
[0030] The sound passes through the first pickup channel 31 and the second pickup channel 32 in sequence and finally enters the microphone. The first pickup channel 31 is through, and the airflow enters and exits through the first pickup channel 31 during the car's movement, which can reduce the impact of airflow on the sound pickup effect.
[0031] The location of the module's microphone hole depends on its installation position on the vehicle.
[0032] Example 2: As shown in the attached document Figure 1 and attached Figure 2 and appendix Figure 4 and attached Figure 5 As shown, the structure is the same as in Embodiment 1, except that:
[0033] The second housing 3 has three pickup channels: a first pickup channel 31, a second pickup channel 32, and a third pickup channel 33. One end of the first pickup channel 31 is connected to the module's pickup hole, and the other end is connected to the outside of the module. One end of the third pickup channel 33 is connected to the first pickup channel 31, and the other end is connected to the outside of the module. One end of the second pickup channel 32 is connected to the microphone's pickup hole, and the other end is connected to the third pickup channel 33. The first pickup channel 31 and the second pickup channel 32 are arranged parallel to each other. The first pickup channel 31 and the third pickup channel 33 are arranged perpendicular to each other.
[0034] The sound enters the microphone sequentially through the first pickup channel 31, the second pickup channel 32, and the third pickup channel 33. The first pickup channel 31 and the second pickup channel 32 are connected. During the car's movement, airflow enters and exits through the first pickup channel 31 and the second pickup channel 32 to minimize the impact of airflow on the sound pickup effect.
[0035] Example 3: As shown in the attached document Figure 6As shown, the structure is the same as in Embodiment 1, except that the diameter of the end of the first pickup channel 31 connected to the pickup hole of the module is smaller than the diameter of the other end.
[0036] In summary, the shape of the pickup channel in this invention is not limited. It can be used not only for suppressing wind noise, but also for waterproofing and shockproofing. It is not limited to microphone modules, but can also be used for shockproof structures of speakers and other devices.
[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A microphone module comprising a first housing, a circuit board with a microphone disposed in the first housing, and a second housing sealingly disposed with the first housing, characterized in that: The second shell is provided with at least two sound pickup channels, each of which is communicated, one end of one sound pickup channel is communicated with the module sound pickup hole, and the other end is communicated with the outside of the module; one end of one sound pickup channel is communicated with the sound pickup hole of the microphone, and the other end is communicated with another sound pickup channel.
2. The microphone module of claim 1, wherein: The second shell is provided with two sound pickup channels, a first sound pickup channel and a second sound pickup channel, one end of the first sound pickup channel is communicated with the module sound pickup hole, and the other end is communicated with the outside of the module; one end of the second sound pickup channel is communicated with the sound pickup hole of the microphone, and the other end is communicated with the first sound pickup channel.
3. The microphone module of claim 2, wherein: The first sound pickup channel and the second sound pickup channel are arranged perpendicularly.
4. The microphone module of claim 1, wherein: The second shell is provided with three sound pickup channels, a first sound pickup channel, a second sound pickup channel and a third sound pickup channel, one end of the first sound pickup channel is communicated with the module sound pickup hole, and the other end is communicated with the outside of the module, one end of the third sound pickup channel is communicated with the first sound pickup channel, and the other end of the third sound pickup channel is communicated with the outside of the module, one end of the second sound pickup channel is communicated with the sound pickup hole of the microphone, and the other end is communicated with the third sound pickup channel.
5. The microphone module of claim 4, wherein: The first sound pickup channel and the second sound pickup channel are arranged in parallel.
6. The microphone module of claim 4, wherein: The first sound pickup channel and the third sound pickup channel are arranged perpendicularly.
7. The microphone module of any one of claims 2 or 4, wherein: The diameter of one end of the first sound pickup channel connected with the module sound pickup hole is less than or equal to the diameter of the other end.
8. The microphone module of claim 1, wherein: The circuit board and the second shell are provided with a sealing filter.
9. The microphone module of claim 8, wherein: The sealing filter is a foam mesh.