Sound collection structure
The sound collection structure addresses wind noise and water intrusion by using a structured design with internal cavities, porous bodies, and protective layers to enhance noise reduction and durability in microphone devices.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2026-04-08
AI Technical Summary
Existing microphone devices face issues with wind noise interference and water intrusion, particularly in outdoor environments, due to bulky sponges that absorb water, lose functionality, and cause dimensional inaccuracies and abnormal sounds.
A sound collection structure with an outer shell, internal cavities, porous bodies, and a waterproof ventilated layer, along with a dustproof member, to filter wind noise and protect against water and dust, using cross-sectional area differences to enhance noise reduction and maintain dimensional accuracy.
Effectively reduces wind noise and protects against water and dust, ensuring accurate sound collection without material waste and extending device lifespan.
Smart Images
Figure 2026060842000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a sound collection structure, particularly a sound collection structure for reducing wind noise.
Background Art
[0002] In the prior art, microphone devices often face problems such as interference from wind noise and water intrusion, especially when used outdoors. Usually, the surface of the microphone is covered with a soundproof material such as sponge to reduce the interference of wind shear noise. The sponge usually has a honeycomb-like and high-density cavity structure, effectively removing low-frequency air vibrations, thereby reducing the impact of wind noise on the sound collection effect.
Summary of the Invention
Problems to be Solved by the Invention
[0003] Currently, the anti-noise method is to use a sponge. However, the sponge used is usually bulky and occupies a relatively large space, making it difficult to apply to miniaturized microphone devices. Next, since the sponge has water absorption, when exposed to a rainy or humid environment, it absorbs water and the honeycomb structure is destroyed, losing the function of reducing wind noise. In addition, by covering the microphone surface with a high-density sponge, it is difficult to accurately control the dimensions of the sponge, and gaps are likely to occur during installation, causing abnormal sounds as airflows pass through the gaps, and further reducing the sound collection quality.
Means for Solving the Problems
[0004] From this perspective, the present invention relates to a sound-collecting structure connected to at least one microphone unit, wherein the sound-collecting structure includes an outer shell, the outer shell having at least one external sound inlet provided on the upper surface of the outer shell, at least one cavity provided inside the outer shell and communicating with the external sound inlet, at least one porous body installed inside the at least one cavity, and at least one internal sound inlet channel for communicating with the at least one microphone unit and the at least one cavity, wherein the cross-sectional area of the at least one internal sound inlet channel is smaller than the cross-sectional area of the at least one cavity.
[0005] In the sound-collecting structure, the volume of the at least one porous body is substantially the same as the volume of the at least one cavity.
[0006] In the sound-absorbing structure described above, the porous material is a foam, sponge, or other soundproofing material.
[0007] In the sound-collecting structure, a waterproof and ventilated layer is further provided inside the at least one cavity, and the waterproof and ventilated layer is located on one side of the at least one external sound inlet and is tightly connected to the at least one porous body.
[0008] In the sound-collecting structure, a dustproof member is provided on one side of the at least one internal sound-incoming channel, and the dustproof member is tightly connected to the porous body in the at least one cavity.
[0009] In the sound-collecting structure described above, the number of the at least one external sound inlet is equal to or greater than the number of the at least one cavity.
[0010] The sound-collecting structure according to claim 1, wherein the number of at least one cavities is two, and the at least one cavities are in communication with each other via at least one connecting channel. [Effects of the Invention]
[0011] The sound-collecting structure of the present invention can reduce wind noise. [Brief explanation of the drawing]
[0012] [Figure 1] This is an explanatory diagram of a first embodiment of the sound collection structure of the present invention. [Figure 2] This is an explanatory diagram of a second embodiment of the sound collection structure of the present invention. [Figure 3] This is an explanatory diagram of a third embodiment of the sound collection structure of the present invention. [Figure 4] This is an explanatory diagram of a fourth embodiment of the sound collection structure of the present invention. [Figure 5] This is an explanatory diagram of a fifth embodiment of the sound collection structure of the present invention. [Figure 6] This is an explanatory diagram of the sixth embodiment of the sound collection structure of the present invention. [Modes for carrying out the invention]
[0013] To provide a more detailed and complete explanation of the contents of this disclosure, applications and specific embodiments of the present invention will be described, but this will not limit the scope of protection of the present invention, and the same or equivalent functions can be achieved using other specific embodiments.
[0014] Figure 1 is an explanatory diagram of a first embodiment of the sound-collecting structure of the present invention, which is connected to a microphone unit 50 and includes an outer shell 10, the outer surface of which is provided an external sound inlet 11 and is used to receive external sound. Inside the outer shell 10 is a first cavity 12, and inside the first cavity 12 is a porous body 20 for filtering wind noise, the first cavity 12 is in communication with the external sound inlet 11 and is in communication with the microphone unit 50 via an internal sound inlet channel 15. It should be noted that in the present invention, the cross-sectional area of the first cavity 12 is larger than the cross-sectional area of the internal sound inlet channel 15, which effectively removes airflow noise and improves the noise reduction effect.
[0015] Furthermore, the volume of the porous body 20 approximates the volume of the first cavity 12, thereby allowing for accurate measurement of the dimensions of the porous body 20, filling the first cavity 12, and preventing airflow from passing through gaps and generating abnormal noise. The porous body 20 is formed of a soundproofing material, which may be, but is not limited to, a foam or sponge having high-density pores.
[0016] To provide the sound-collecting structure with waterproof and dustproof performance, a waterproof and ventilated layer 30 and a dustproof member 40 are provided inside the first cavity 12. The waterproof and ventilated layer 30 is tightly bonded to the external sound inlet 11 to prevent rainwater and moisture from entering the first cavity 12 and to prevent the porous body 20 from impairing its noise reduction effect due to water absorption. The dustproof member 40 is tightly connected to the entrance of the internal sound inlet channel 15 to prevent minute debris and dust from entering the microphone unit 50. Here, the porous body 20 is tightly connected to the waterproof and ventilated layer 30 and the dustproof member 40, respectively, ensuring that external sound passes through the waterproof and ventilated layer 30 to filter out moisture before passing through the porous body 20, and passes through the dustproof member 40 to filter out dust and debris before entering the microphone unit 50, thereby achieving overall noise prevention, waterproofing, and dustproofing effects.
[0017] In this embodiment, the material of the waterproof and breathable layer 30 is polytetrafluoroethylene, polyurethane, or stretched polytetrafluoroethylene, and the material of the dustproof member 40 is nonwoven fabric, nylon, or polyester fiber, but is not limited to these, and the same effect may be achieved using other materials.
[0018] In addition to a single cavity, the sound-collecting structure of the present invention can have multiple cavities to improve the overall noise suppression effect. Figure 2 shows a second embodiment of the present invention, in which a second cavity 14 is further provided inside the outer shell 10, and the porous body 20 is similarly provided inside the second cavity 14 as well. When external sound enters the first cavity 12 through the external sound inlet 11, a first noise filtering is performed. The second cavity 14 is provided below the first cavity 12 and is in communication with the second cavity 14 via a connecting channel 13, and when the sound that has undergone the first noise filtering enters the second cavity 14 through the connecting channel 13, a second noise filtering is performed. The second cavity 14 and the microphone unit 50 are in communication with each other via the internal sound input channel 15, and the sound that has undergone a second noise filtering is sent to the microphone unit 50 via the internal sound input channel 15. Here, the cross-sectional area of the second cavity 14 is larger than the cross-sectional area of the internal sound input channel 15 and similarly has the function of removing airflow noise.
[0019] In this embodiment, the waterproof and breathable layer 30 and the dustproof member 40 are provided inside the first cavity 12 and the second cavity 14, respectively, and the porous body 20 inside the first cavity 12 is tightly connected to the waterproof and breathable layer 30. The porous body 20 inside the second cavity 14 is tightly connected to the dustproof member 40, and similarly, the waterproof and breathable layer 30 is tightly bonded to the external sound inlet 11 to prevent rain and moisture from entering the first cavity 12. The dustproof member 40 is tightly connected to the entrance of the internal sound inlet channel 15 to prevent minute debris and dust from entering the microphone unit 50, and the overall noise reduction effect is improved by increasing the number of cavities.
[0020] In order to make the present invention applicable to different devices and meet different requirements, other embodiments generated by performing adjustments based on the second embodiment will be described here. Referring to FIGS. 3 and 4, the third and fourth embodiments of the sound collection structure of the present invention are shown. The sound collection structure is connected to two microphone units 50. The number of the external sound input ports 11, the first cavity 12, the waterproof ventilation layer 30, the connection channel 13, the internal sound input channel 15, and the dust-proof member 40 is two, and the number of the second cavities 14 is one and two respectively. Next, FIGS. 5 and 6 show the fifth and sixth embodiments of the sound collection structure of the present invention. The difference from the third and fourth embodiments is that the number of the external sound input ports 11 is three, and the number of the first cavity 12 and the waterproof ventilation layer 30 is one.
[0021] Due to the above different designs, the sound collection structure can effectively achieve the noise reduction effect without affecting the sound collection quality for different usage objects. When applied to a small microphone device, as shown in FIGS. 3 and 4, the two external sound input ports 11 are respectively installed corresponding to the two first cavities 12, and external voices are received by matching them one by one to perform effective noise filtering. When it is necessary to further improve the filtering effect, as shown in FIG. 4, the second cavity 14 with a relatively large volume can be used to enhance the second-stage noise filtering effect. When it is necessary to receive more external voices, as shown in FIGS. 5 and 6, by connecting the external sound input ports 11 to the first cavity 12 simultaneously, more external voices can be received in a multi-to-one manner, and at the same time, noise can be effectively filtered. Also, as described above, the noise filtering effect can be further improved by the second cavity 14 with a relatively large volume in FIG. 5.
[0022] Thereby, the sound collection structure of the present invention provides an effect of reducing wind noise. Since the cross-sectional area of the second cavity 14 is larger than that of the internal sound inlet channel 15, the noise of the airflow is removed, and the wind cut noise is filtered by the porous body 20. The size of the porous body 20 is designed based on the volume of the cavity, which not only ensures the dimensional accuracy, avoids excessive waste of materials, reduces the material cost, but also can further improve the overall wind noise reduction effect by filtering multiple cavities. By installing the waterproof breathable layer 30 and the dustproof member 40, it is possible to prevent water and dust from damaging the functions of the porous body 20 and the microphone unit 50, and effectively extend the service life of the entire microphone device.
Description of Reference Numerals
[0023] 10 Outer shell 11 External sound inlet 12 First cavity 13 Connection channel 14 Second cavity 15 Internal sound inlet channel 20 Porous body 30 Waterproof breathable layer 40 Dustproof member 50 Microphone unit
Claims
1. A sound-collecting structure connected to at least one microphone unit, wherein the sound-collecting structure includes an outer shell, and the outer shell is At least one external sound inlet is provided on the upper surface of the outer shell, A cavity provided inside the outer shell and communicating with the external sound inlet, At least one porous body installed inside the at least one cavity, The at least one microphone unit and the at least one cavity, and the at least one internal input channel for communicating with the at least one cavity, It has, A sound-collecting structure in which the cross-sectional area of the at least one internal sound-input channel is smaller than the cross-sectional area of the at least one cavity.
2. The sound-receiving structure according to claim 1, wherein the volume of the at least one porous body is substantially the same as the volume of the at least one cavity.
3. The sound-absorbing structure according to claim 2, wherein the porous material is a foam, sponge, or other sound-insulating material.
4. The sound-collecting structure according to claim 1, wherein a waterproof and ventilated layer is further provided inside the at least one cavity, the waterproof and ventilated layer is located on one side of the at least one external sound inlet and is tightly connected to the at least one porous body.
5. The sound-receiving structure according to claim 1, wherein a dustproof member is provided on one side of the at least one internal sound-receiving channel, and the dustproof member is tightly connected to the porous body in the at least one cavity.
6. The sound-collecting structure according to claim 1, wherein the number of the at least one external sound inlet is equal to or greater than the number of the at least one cavity.
7. The sound-collecting structure according to claim 1, wherein the number of the at least one cavity is two, and the at least one cavity is in communication with each other via at least one connecting channel.