Wind noise eliminating structure of mic
By setting up a wind-down noise groove and sound-transmitting hole in the upper case of the headphones to form a sound-transmitting channel, and setting a PET chip in the channel to reflect and absorb wind sound, the shortcomings of existing headphone microphones in reducing wind noise are solved, achieving more efficient wind noise cancellation and optimization of headphone structure.
Patent Information
- Application Number
- CN202421519902.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-28
AI Technical Summary
Existing headphone microphones have shortcomings in reducing wind noise. Simply increasing the area or thickness of noise reduction materials is not only difficult to meet higher wind noise reduction needs, but is also not conducive to the compactness of wireless headphones.
By setting up a wind-down noise groove and sound-transmitting hole in the upper case of the headphones to form a sound-transmitting channel, and setting a PET sheet in the channel to reflect and absorb wind sound, avoiding wind noise directly transmitted to the microphone.
Effectively eliminates wind noise and optimizes the headphone structure, which is suitable for the compactness of wireless headphones, and is more optimized than simply adding noise reduction materials.
Smart Images
Figure CN222916150U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of earphone microphones, and specifically discloses a mic wind noise elimination structure. Background Art
[0002] The existing wireless earphone structure generally includes earplugs, a housing, a battery module, a wireless connection module, a control module, and a microphone. Among them, the microphone is an electret condenser microphone, also simply referred to as a mic. The wind noise reduction effect of the microphone is one of the key points reflecting the quality of the earphone product.
[0003] To reduce the wind noise of the microphone, existing earphone manufacturers usually take some measures. For example, a wind noise shielding grid or wind noise shielding foam is added around the microphone to reduce the direct impact of wind on the microphone, improve the sensitivity and accuracy of the microphone, and thus provide clearer sound quality.
[0004] However, the existing method of adding noise reduction materials can no longer meet the current higher wind noise reduction requirements. Blindly increasing the area and thickness of the noise reduction materials to achieve a higher wind noise reduction effect is not conducive to the miniaturization of the wireless earphone structure. Therefore, further improvement is needed. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a mic wind noise elimination structure.
[0006] The utility model discloses a mic wind noise elimination structure, adopting the following technical scheme:
[0007] A mic wind noise elimination structure includes an upper shell and a microphone head installed in the upper shell. The upper shell is provided with a sound transmission hole communicating with the outside and the inside of the shell. A wind noise reduction groove is provided on the inner top wall of the upper shell. The wind noise reduction groove is located on one side of the sound transmission hole and communicates with the sound transmission hole to form a sound transmission channel. The microphone head is located below the wind noise reduction groove. A PET film is provided on the surface of the sound transmission channel opposite to the sound transmission hole. The PET film is provided with a first through hole corresponding to the microphone head.
[0008] Preferably, the projection surface of the PET film covers the projection surface of the sound transmission hole and the projection surface of the wind noise reduction groove.
[0009] Preferably, a wind noise reduction mesh cloth is provided on the top surface of the upper shell, and the projection surface of the wind noise reduction mesh cloth covers the projection surface of the sound transmission hole.
[0010] Preferably, a first installation groove is provided on the top surface of the upper shell, and the wind noise reduction mesh cloth is arranged in the first installation groove.
[0011] Preferably, a second mounting groove is provided on the inner top wall of the upper shell, and the PET sheet is disposed in the second mounting groove.
[0012] Preferably, a microphone pad is provided between the microphone and the upper shell, and the microphone pad is provided with a second through hole corresponding to the microphone.
[0013] Preferably, the PET sheet is double-sided adhesive and is bonded to the microphone pad and the upper shell.
[0014] Preferably, a PCB board is further provided inside the upper shell. The PCB board is provided with a third through hole. The microphone is mounted on the PCB board and corresponds to the third through hole, and the microphone pad is pressed against the PCB board.
[0015] Preferably, a cover shell is provided on the top surface of the upper shell. The cover shell covers the wind noise reduction mesh cloth therein, and the cover shell is provided with a plurality of air inlet holes.
[0016] Preferably, the wind noise reduction groove and the sound transmission channel are in a T shape or an L shape in cross section.
[0017] Compared with the prior art, the present invention has at least the following beneficial effects:
[0018] By providing a wind noise reduction groove and a sound transmission hole to form a sound transmission channel, the microphone of the present invention is located at a position of the sound transmission channel far from the sound transmission hole, rather than directly facing the sound transmission hole. When there is a wind flowing through the upper shell of the microphone, the microphone will not be directly blown by the wind to generate wind noise. Moreover, the PET sheet provided on the sound transmission channel and facing the sound transmission hole can reflect and absorb the sound waves generated by the wind blowing into the sound transmission channel, and the wind noise stops in the sound transmission channel and will not be transmitted to the microphone, thereby having an excellent effect of eliminating wind noise. Compared with simply increasing the area or thickness of the noise reduction material, the structure of the earphone is more optimized, which is beneficial to the miniaturization of the structure of the wireless earphone. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic diagram of the overall structure of the mic wind noise elimination structure of this embodiment;
[0020] Figure 2 is a schematic diagram of the structural disassembly of the mic wind noise elimination structure of this embodiment;
[0021] Figure 3 is a bottom view of the upper shell of the mic wind noise elimination structure of this embodiment;
[0022] Figure 4 is a partial longitudinal sectional view of the mic wind noise elimination structure of this embodiment;
[0023] Figure 5 is a transverse sectional view of the mic wind noise elimination structure of this embodiment.
[0024] Description of the reference numerals in the drawings:
[0025] 1. Upper shell; 11. Sound transmission hole; 12. Wind noise reduction groove; 13. First installation groove; 14. Second installation groove; 2. Microphone; 3. Wind noise reduction mesh; 4. Cover shell; 5. PET sheet; 51. First through hole; 6. Microphone pad; 61. Second through hole; 7. PCB board; 71. Third through hole. Detailed implementation manners
[0026] To make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners.
[0027] This embodiment discloses a wind noise elimination structure for a microphone. Referring to Figures 1-5 , it includes an upper shell 1 and a microphone 2 installed inside the upper shell 1. The upper shell 1 is provided with a sound transmission hole 11 communicating the outside with the inside of the shell. The inner top wall of the upper shell 1 is provided with a wind noise reduction groove 12. The wind noise reduction groove 12 is located on one side of the sound transmission hole 11 and communicates with the sound transmission hole 11 to form a sound transmission channel. The microphone 2 is located directly below the wind noise reduction groove 12. A PET sheet 5 is provided on the side of the sound transmission channel opposite to the sound transmission hole 11. The PET sheet 5 is provided with a first through hole 51 corresponding to the microphone 2. By providing the wind noise reduction groove 12 and the sound transmission hole 11 to form a sound transmission channel, since the microphone 2 is located at the position of the sound transmission channel away from the sound transmission hole 11, rather than directly facing the sound transmission hole 11, when there is a flow of air passing through the upper shell 1 of the microphone, the microphone 2 will not be directly blown by the wind to generate wind noise. In addition, the PET sheet 5 provided on the side of the sound transmission channel facing the sound transmission hole 11 has a certain ability to reflect and absorb sound waves. When the wind passes through the PET sheet 5, the PET sheet 5 will vibrate and absorb part of the sound wave energy, thereby reducing the propagation of sound waves to achieve the effect of eliminating wind noise. Compared with simply increasing the area or thickness of the noise reduction material, the structure of the earphone is more optimized, which is beneficial to the miniaturization of the structure of the wireless earphone.
[0028] In this embodiment, a wind noise reduction mesh 3 is provided on the top surface of the upper shell 1. The projection surface of the wind noise reduction mesh 3 covers the projection surface of the sound transmission hole 11. See Figure 2 . A first installation groove 13 for accommodating the wind noise reduction mesh 3 is provided on the top surface of the upper shell 1 to facilitate the better positioning and installation of the wind noise reduction mesh 3. A cover shell 4 for covering the wind noise reduction mesh 3 is provided on the top surface of the upper shell 1. The cover shell 4 is provided with a plurality of air inlet holes. The cover shell 4 can be specifically a steel mesh to play a role in dust prevention and protecting the wind noise reduction mesh 3. By providing the wind noise reduction mesh 3, when the wind blows over the upper shell of the microphone, it is first buffered by the wind noise reduction mesh 3, thereby reducing the air flow situation entering the sound transmission hole 11 and further improving the wind noise reduction effect.
[0029] In this embodiment, see Figure 3, the projection surface of the PET sheet 5 preferably covers the projection surface of the sound transmission hole 11 and the projection surface of the wind noise reduction groove 12, so as to ensure that the wind blown into the sound transmission channel can touch the PET sheet 5, further improving the wind noise reduction effect. The inner top wall of the upper shell 1 is provided with a second installation groove 14 for accommodating the PET sheet 5, so as to facilitate the positioning and installation of the PET sheet 5.
[0030] In this embodiment, a microphone pad 6 is further provided between the microphone 2 and the upper shell 1. The projection surface of the microphone pad 6 covers the projection surface of the sound transmission hole 11 and the projection surface of the wind noise reduction groove 12. Specifically, the microphone pad 6 can be designed to cover the PET sheet 5, and the microphone pad 6 is provided with a second through hole 61 corresponding to the microphone 2. By providing the microphone pad 6, when the microphone is externally vibrated or touched, the microphone pad 6 can absorb part of the vibration energy to play a shock-absorbing role, thereby reducing the vibration transmitted to the microphone 2 and avoiding generating noise.
[0031] In this embodiment, see Figure 4 , the PET sheet 5 is double-sided adhesive and adhered to the microphone pad 6 and the upper shell 1 to ensure sealing and prevent air from flowing out of the shell body through the gap between the PET sheet 5 and the upper shell 1 or the microphone pad 6, so as to further improve the noise reduction effect.
[0032] In this embodiment, a PCB board 7 is further provided in the shell 1. The PCB board 7 is provided with a third through hole 71, see Figure 5 , the first through hole 51, the second through hole 61 and the third through hole 71 are all located below the wind noise reduction groove 12 and on the same axis in the vertical direction. The microphone 2 is installed on the PCB board 7 and corresponds to the third through hole 71. The microphone 2 is electrically connected to the circuit on the PCB board 7, and the microphone pad 6 is press-fitted and sealed with the PCB board 7, thus ensuring better sealing of the sound transmission channel formed by the sound transmission hole 11 and the wind noise reduction groove 12.
[0033] The technical solutions provided by the present utility model have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.
Claims
1. A mic wind noise elimination structure, comprising an upper shell and a microphone head installed in the upper shell, wherein the upper shell is provided with a sound-transmitting hole connecting the outside with the shell, characterized in that: A wind noise reduction groove is provided on the inner top wall of the upper shell, and the wind noise reduction groove is located on one side of the sound hole and is connected with the sound hole to form a sound transmission channel. The microphone is located below the wind noise reduction groove, and a PET sheet is provided on a side of the sound transmission channel opposite to the sound hole, and the PET sheet is provided with a first through hole corresponding to the microphone.
2. A mic wind noise elimination structure according to claim 1, characterized in that: The projection surface of the PET sheet covers the projection surface of the sound-transmitting hole and the projection surface of the wind noise reduction groove.
3. A mic wind noise elimination structure according to claim 1, characterized in that: The top surface of the upper shell is provided with a wind noise reduction mesh, and the projection surface of the wind noise reduction mesh covers the projection surface of the sound-transmitting hole.
4. A mic wind noise elimination structure according to claim 3, characterized in that: A first mounting groove is provided on the top surface of the upper shell, and the wind noise reduction mesh is arranged in the first mounting groove.
5. The mic wind noise elimination structure according to claim 1, characterized in that: The inner top wall of the upper shell is provided with a second mounting groove, and the PET sheet is arranged in the second mounting groove.
6. A mic wind noise elimination structure according to claim 1, characterized in that: A microphone pad is provided between the microphone and the upper shell, and the microphone pad is provided with a second through hole corresponding to the microphone.
7. A mic wind noise elimination structure according to claim 6, characterized in that: The PET sheet has double-sided adhesive backing and is bonded to the microphone pad and the upper shell.
8. The mic wind noise elimination structure according to claim 6, characterized in that: It also includes a PCB board arranged in the upper shell, the PCB board is provided with a third through hole, the microphone head is mounted on the PCB board and corresponds to the third through hole, and the microphone pad is pressed with the PCB board.
9. The mic wind noise elimination structure according to claim 3, characterized in that: A cover shell is provided on the top surface of the upper shell, and the wind noise reduction mesh cloth is covered by the cover shell. The cover shell is provided with a plurality of air inlet holes.
10. A mic wind noise elimination structure according to any one of claims 1 to 9, characterized in that: The wind noise reduction groove and the sound-transmitting channel are T-shaped or L-shaped in cross section.