Sound receiving structure

Abstract

A sound-receiving structure with wind noise resistance includes an outer shell with at least one external sound inlet. The outer shell contains at least one cavity communicating with the external sound inlet. Each cavity has a perforated structure. The outer shell also has at least one internal sound channel connecting the cavity and at least one microphone unit. The cross-sectional area of ​​the internal sound channel is smaller than that of the cavity. When external sound is transmitted to the microphone unit through the external sound inlet and the cavity, wind noise interference is significantly and effectively reduced through the perforated structure and internal sound channel within the cavity, ensuring the microphone's sound reception quality. This structure is suitable for multiple microphone units and allows adjustment of the number of cavities and channels as needed.

Description

[Technical Field]

[0001] This invention relates to a radio receiving structure, and more particularly to a radio receiving structure resistant to wind noise. [Previous Technology]

[0002] In the prior art, microphone devices often face problems such as wind noise interference and water intrusion, especially in outdoor applications. Traditional technology usually covers the surface of the microphone with acoustic damping materials such as sponge to reduce wind noise interference. The sponge usually has a honeycomb-like and high-density cavitation structure, which can effectively eliminate low-frequency air vibrations, thereby reducing the impact of wind noise on the sound reception. However, the sponge used is usually bulky and occupies a lot of space, making it difficult to apply to miniaturized microphone devices. Secondly, because the sponge is water-absorbing, when it is exposed to rain or a humid environment, it will absorb water, causing its honeycomb structure to be damaged, thus losing its function of reducing wind noise. In addition, the method of covering the microphone surface with high-density sponge makes it difficult to precisely control the size of the sponge, and gaps are easily generated during installation, causing airflow through the gaps to generate abnormal noise, further reducing the sound reception quality. [Summary of the Invention]

[0003] In view of the above, the present invention provides a sound receiving structure connected to at least one microphone unit. The sound receiving structure includes a housing, the housing having: at least one external sound inlet disposed on the upper surface of the housing; at least one cavity disposed inside the housing and communicating with the external sound inlet; at least one porous body disposed inside the at least one cavity; and at least one internal sound channel for connecting the at least one microphone unit and the at least one cavity, wherein the cross-sectional area of ​​the at least one internal sound channel is smaller than the cross-sectional area of ​​the at least one cavity.

[0004] Wherein, the volume of the at least one porous body is substantially the same as the volume of the at least one cavity.

[0005] The porous bodies are foam, sponge or other acoustic damping materials.

[0006] The interior of the at least one cavity is further provided with a waterproof and breathable layer, which is located on one side of the at least one external sound inlet and is tightly connected to the at least one porous body.

[0007] Wherein, a dustproof component is provided on one side of the at least one internal sound channel, and the dustproof component is tightly connected to the porous body inside the at least one cavity.

[0008] Wherein, the number of the at least one external sound inlet is greater than or equal to the number of the at least one cavity.

[0009] Wherein, the number of the at least one cavity is two, the at least one cavity being interconnected through at least one connecting channel. [Implementation Method]

[0011] To make the description of the contents of the present disclosure more exhaustive and complete, an explanation is given for the application and specific embodiments of the present invention, but not to limit the scope of protection of the present invention, other specific embodiments may be utilized to achieve the same or equal functions.

[0012] See FIG There is a porous body 20 for filtering air-cut noise, wherein the first cavity 12 is in communication with the external sound inlet 11 , and the first cavity 12 is connected with the microphone monomer 50 through an internal incoming channel 15. It is worth mentioning that the present invention utilizes the cross-sectional area of ​​the first cavity 12 to be greater than the cross-sectional area of ​​the internal incoming channel 15 to effectively eliminate the effect of airflow noise and increase the anti-noise.

[0013] Furthermore, the volume of the porous body 20 is approximated by the volume of the first cavity 12 , thereby exacting the dimensions of the porous bodies 20 to fill the first cavity 12 , avoiding the creation of seams causing airflow to produce heterophony through the seams, the porous body 20 is made of acoustic resistance material, which may be, but is not limited to, foam or sponge with high density pores.

[0014] In order to enable the sound recording structure to have waterproof and dustproof properties, the first cavity 12 is provided with a waterproof and breathable layer 30 and a dustproof piece 40 inside, the waterproof and breathable layer 30 is tightly fitted with the external sound inlet 11 to block rainwater or moisture from entering the interior of the first cavity 12 , preventing the porous body 20 from damaging the noise-resistant inlet 40 due to water absorption , to prevent tiny debris and dust from entering the microphone unit 50; wherein, the porous body 20 is tightly connected to the waterproof and breathable layer 30 and the dustproof piece 40 , respectively, to ensure that external sound filters moisture through the waterproof and breathable layer 30 before passing through the porous body 20 , and to filter through the dustproof piece 40 before entering the microphone unit 50

[0015] In this embodiment, the waterproof and breathable layer 30 is made of polytetrafluoroethylene, polyurethane or expanded polytetrafluoroethylene, and the dustproof component 40 is made of non-woven fabric, nylon or polyester fiber, but is not limited thereto, and other materials can be used to achieve the same effect.

[0016] In addition to a single cavity, the sound-receiving structure of the present invention can have multiple cavities to improve the overall noise reduction effect. Please refer to Figure 2, which illustrates the second embodiment of the present invention. The outer shell 10 is also provided with a second cavity 14 and a porous body 20. When external sound enters the first cavity 12 through the external sound inlet 11, it will undergo a first noise filtering. The second cavity 14 is located below the first cavity 12 and is connected through a connecting channel 13. When the sound filtered by the first noise enters the second cavity 14 through the connecting channel 13, it will undergo a second noise filtering. The second cavity 14 is connected to the microphone unit 50 through the internal sound inlet 15, so that the sound filtered by the second noise is transmitted to the microphone unit 50 through the internal sound inlet 15. The cross-sectional area of ​​the second cavity 14 is also larger than the cross-sectional area of ​​the internal sound inlet 15, and it also has the function of eliminating airflow noise.

[0017] In this embodiment, the waterproof and breathable layer 30 and the dustproof component 40 are respectively disposed inside the first cavity 12 and the second cavity 14. The porous body 20 in the first cavity 12 is tightly connected to the waterproof and breathable layer 30, and the porous body 20 in the second cavity 14 is tightly connected to the dustproof component 40. Similarly, the waterproof and breathable layer 30 is tightly fitted to the external sound inlet 11 to prevent rainwater or moisture from entering the interior of the first cavity 12, while the dustproof component 40 is tightly connected to the entrance of the internal sound channel 15 to prevent tiny debris and dust from entering the microphone unit 50. Due to the addition of an extra cavity, the overall noise reduction effect is improved.

[0018] To make the present invention applicable to different devices and meet different needs, other embodiments resulting from adjustments to the second embodiment are described here. Please refer to Figures 3 and 4, which illustrate the third and fourth embodiments of the sound-receiving structure of the present invention. This sound-receiving structure is connected to two microphone units 50. The number of the external sound inlet 11, the first cavity 12, the waterproof and breathable layer 30, the connecting channel 13, the internal sound channel 15, and the dustproof component 40 is two, while the number of the second cavity 14 is one and two, respectively. Next, please refer to Figures 5 and 6, which illustrate the fifth and sixth embodiments of the sound-receiving structure of the present invention. The difference from the third and fourth embodiments is that the number of the external sound inlet 11 is three, while the number of the first cavity 12 and the waterproof and breathable layer 30 is one.

[0019] Through the above-mentioned different designs, the sound receiving structure can effectively achieve noise reduction without affecting the sound quality for different users. When applied to a small microphone device, as shown in Figures 3 and 4, the two external sound inlets 11 are respectively set to correspond with the two first cavities 12 to perform efficient noise filtering of the received external sound in a one-to-one manner. If it is necessary to further improve the filtering effect, as shown in Figure 4, the larger second cavity 14 can be used to enhance the second noise filtering effect. When it is necessary to receive more external sound, as shown in Figures 5 and 6, these external sound inlets 11 can be connected to the first cavity 12 at the same time. In a many-to-one manner, noise can still be effectively filtered while receiving a larger amount of external sound. In addition, as explained above, the noise filtering effect can be further improved by using the larger second cavity 14 in Figure 5.

[0020] Accordingly, the sound-receiving structure of the present invention provides the effect of resisting wind noise. By eliminating airflow noise through the cross-sectional area of ​​the cavities 14 being larger than the cross-sectional area of ​​the internal inlet channel 15, and by filtering wind shear noise through the porous bodies 20, since the size of the porous bodies 20 is designed according to the volume of the cavity, not only is the size accurate, but also excessive waste of materials is avoided, thereby reducing the cost of consumables. In addition, the filtering method through multiple cavities can further improve the overall wind noise resistance effect. Furthermore, by utilizing the arrangement of the waterproof and breathable layer 30 and the dustproof component 40, water and dust can be prevented from damaging the function of the porous bodies 20 and the microphone unit 50, effectively extending the service life of the entire microphone device. [Simplified Explanation of the Diagram]

[0010] Figures 1 to 6 are schematic diagrams of the first to sixth embodiments of the radio receiver structure of the present invention.

Claims

1. A sound-receiving structure connected to at least one microphone unit, the sound-receiving structure comprising a housing, the housing having: at least one external sound inlet disposed on the upper surface of the housing; and at least two cavities disposed vertically spaced inside the housing, wherein one cavity communicates with the external sound inlet, and the other cavity communicates with at least one internal sound channel, and each cavity has at least one perforated body disposed inside; wherein... The at least one internal sound channel is connected to the at least one microphone unit, and the cross-sectional area of ​​the at least one internal sound channel is smaller than the cross-sectional area of ​​each cavity.

2. The sound receiving structure as described in claim 1, wherein the volume of the at least one porous body inside each cavity is substantially the same as the volume of each cavity.

3. The sound-receiving structure as described in claim 2, wherein the porous bodies are foam, sponge or other acoustic damping materials.

4. The sound receiving structure as described in claim 1, wherein a waterproof and breathable layer is disposed inside one of the cavities, the waterproof and breathable layer being located on one side of the at least one external sound inlet and being tightly connected to the at least one porous body.

5. The sound receiving structure as described in claim 1, wherein a dustproof component is provided on one side of the at least one internal sound channel, and the dustproof component is tightly connected to the porous body inside each of the cavities.

6. The sound receiving structure as described in any of claims 2 to 5, wherein the number of the at least one external sound inlet is greater than or equal to two.

7. The radio receiver structure as described in claim 1, wherein the two cavities are interconnected through at least one connecting channel.

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