A directional microphone
Patent Information
- Application Number
- CN202522066473.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-25
AI Technical Summary
[0002]目前的定向麦克风，或没有防风降噪结构，或在外壳外部套设海绵套，海绵套主要起到防风防尘作用，存在容易脏污、破损、受外力摩擦掉落、降噪效果不佳等弊端
[0013]上述定向麦克风，将防风降噪棉置于外壳内部，在外壳的隔离保护作用下，防风降噪棉不容易脏污、破损以及受外力摩擦掉落，而且，防风降噪棉具有第一防风降噪部和第二防风降噪部，第一防风降噪部和第二防风降噪部均被压缩在外壳和拾音器之间，至少部分第一防风降噪部位于顶部进音孔和顶部拾音孔之间，至少部分第二防风降噪部位于侧部进音孔和底部拾音孔之间，能够减少从顶部进音孔以及侧部进音孔进来的气流量，达到防风效果，而且从顶部进音孔进来的气流会先经过第一防风降噪部再经过顶部拾音孔才传到拾音器内部的振膜上，从侧部进音孔进来的气流会先经过第二防风降噪部再经过底部拾音孔才传到拾音器内部的振膜上，气流在经过第一防风降噪部和第二防风降噪部时会被微孔分散成细小缓慢的气流，因此传到振膜上时冲击力较小、不会引起振膜的强烈振动，所以能缓解从顶部拾音孔和底部拾音孔进来的气流引发噪声的问题，满足了顶部和底部同时拾音的定向麦克风的防风降噪需求。
Smart Images
Figure CN224909610U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of microphone technology, and in particular to a directional microphone. Background Technology
[0002] Current directional microphones either lack windproof and noise-canceling structures or have foam covers on the outside of the casing. These foam covers primarily serve to protect against wind and dust, but they are prone to getting dirty, breaking, falling off due to friction, and have poor noise-canceling effects. Therefore, how to avoid some or all of these drawbacks is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0003] To address the aforementioned technical problems, this application provides a directional microphone, the directional microphone comprising: The housing has a peripheral wall and a top wall disposed at the top of the peripheral wall, the top wall having a top sound inlet hole and the peripheral wall having a side sound inlet hole; A microphone is located inside the housing. The top surface of the microphone has a top pickup hole that communicates with the top sound inlet hole, and the bottom surface of the microphone has a bottom pickup hole that communicates with the side sound inlet hole. The windproof and noise-reducing cotton is located inside the outer shell. The outer shell and the microphone cooperate to compress the windproof and noise-reducing cotton. The windproof and noise-reducing cotton includes a first windproof and noise-reducing part and a second windproof and noise-reducing part. At least a portion of the first windproof and noise-reducing part is located between the top sound inlet and the top sound pickup hole, and at least a portion of the second windproof and noise-reducing part is located between the side sound inlet and the bottom sound pickup hole.
[0004] One embodiment of a directional microphone includes a top wall having a first region and a second region surrounding the outer periphery of the first region, with the top sound inlet located in the first region; The top surface of the microphone has a third region and a fourth region surrounding the outer periphery of the third region, and the top pickup hole is located in the third region; The second region and the fourth region cooperate to press the first windproof and noise-reducing part together, forming a first gap between the first windproof and noise-reducing part and the first region, and forming a second gap between the first windproof and noise-reducing part and the third region.
[0005] In one embodiment of a directional microphone, a bottom-protruding annular boss is provided on the second region, the annular boss and the fourth region cooperate to press the first windproof and noise-reducing part together, and the first gap is formed inside the enclosed space of the annular boss.
[0006] In one embodiment of a directional microphone, a recessed cavity is provided on the bottom surface of the first windproof noise reduction part, and an annular protrusion is formed around the cavity. The annular protrusion abuts against the fourth region, and the second gap is formed inside the enclosed space of the annular protrusion.
[0007] In one embodiment of a directional microphone, a second windproof noise reduction part is arranged around the microphone, and the peripheral wall and the peripheral side walls of the microphone cooperate to press the second windproof noise reduction part, and the top end of the second windproof noise reduction part is fixedly connected to or integrally formed with the first windproof noise reduction part.
[0008] In one embodiment of a directional microphone, the directional microphone includes a bracket with a support sleeve. A second windproof noise reduction part is also disposed around the support sleeve. The peripheral wall and the peripheral side walls of the support sleeve cooperate to press the second windproof noise reduction part. The peripheral side walls of the support sleeve are provided with through holes for connecting the bottom pickup hole and the side sound inlet hole. At least a portion of the second windproof noise reduction part is located between the through hole and the side sound inlet hole.
[0009] In one embodiment of a directional microphone, foam is provided between the top surface of the support sleeve and the bottom surface of the pickup.
[0010] In one embodiment of a directional microphone, the outer sidewalls of the support sleeve are provided with annular steps, the bottom end of the second windproof and noise-reducing part abuts against the annular steps, and there is a certain interference fit between the bottom end of the second windproof and noise-reducing part and the annular steps.
[0011] In one embodiment of a directional microphone, the thickness of the first windproof noise reduction part ranges from 2.5mm to 3.5mm, and the thickness of the second windproof noise reduction part is not greater than the thickness of the first windproof noise reduction part.
[0012] In one embodiment of a directional microphone, the porosity of the windproof and noise-reducing cotton is in the range of 60ppi-70ppi.
[0013] The aforementioned directional microphone places the windproof and noise-reducing cotton inside the outer shell. Under the protective isolation of the shell, the windproof and noise-reducing cotton is not easily soiled, damaged, or dislodged by external friction. Furthermore, the windproof and noise-reducing cotton has a first windproof and noise-reducing section and a second windproof and noise-reducing section. Both sections are compressed between the outer shell and the microphone. At least a portion of the first windproof and noise-reducing section is located between the top sound inlet and the top pickup hole, and at least a portion of the second windproof and noise-reducing section is located between the side sound inlet and the bottom pickup hole. This reduces the airflow entering from the top and side sound inlets, achieving a windproof effect. Moreover, from the top... The airflow entering through the sound inlet passes through the first windproof noise reduction section and then through the top sound pickup hole before reaching the diaphragm inside the microphone. The airflow entering through the side sound inlet passes through the second windproof noise reduction section and then through the bottom sound pickup hole before reaching the diaphragm inside the microphone. When the airflow passes through the first and second windproof noise reduction sections, it is dispersed into a fine and slow airflow by the micropores. Therefore, the impact force when it reaches the diaphragm is small and will not cause strong vibration of the diaphragm. This can alleviate the noise problem caused by the airflow entering through the top and bottom sound pickup holes, and meet the windproof noise reduction requirements of directional microphones that pick up sound from the top and bottom at the same time. Attached Figure Description
[0014] Figure 1 An exploded view of the first embodiment of the directional microphone provided in this application; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 Sectional view II; Figure 4 for Figure 2 Sectional view II-II; Figure 5 Section II view of the integral structure of the outer shell; Figure 6 A three-dimensional view of the assembled structure of the outer shell; The annotations in the attached figures are explained as follows: 100 Outer shell, 101 Top wall, 101a Top sound inlet, 101b Annular boss, A First region, B Second region, 102 Peripheral wall, 1021 First wall portion, 1022 Second wall portion, 102a Side sound inlet, 103 Outer convex wall, 104 Receiving cavity; 200 pickup, C zone 3, D zone 4; F is the first gap, G is the second gap; 300 Windproof and noise-reducing cotton, 301 First windproof and noise-reducing part, 301a Concave cavity, 301b Annular protrusion, 302 Second windproof and noise-reducing part; 400 bracket, 401 support sleeve, 401a through hole, 401b annular step, 402 support plate; 500 foam; 600 control motherboard; 700 pins. Detailed Implementation
[0015] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0016] like Figures 1-6 As shown, the directional microphone provided in this application includes at least a housing 100, a pickup 200, and windproof and noise-reducing cotton 300.
[0017] Among them, such as Figure 3 As shown, the outer casing 100 has a peripheral wall 102 and a top wall 101 disposed at the top of the peripheral wall 102. The top wall 101 is provided with a top sound inlet 101a. Preferably, the opening ratio of the top wall 101 is controlled to be more than 30%. The peripheral wall 102 is provided with a side sound inlet 102a.
[0018] The microphone 200 is located inside the housing 100. The top surface of the microphone 200 has a top pickup hole (not shown in the figure), which communicates with the top sound inlet 101a. The bottom surface of the microphone 200 has a bottom pickup hole (not shown in the figure), which communicates with the side sound inlet 102a.
[0019] The windproof and noise-reducing cotton 300 is located inside the outer casing 100. The windproof and noise-reducing cotton 300 includes a first windproof and noise-reducing part 301 and a second windproof and noise-reducing part 302. At least a portion of the first windproof and noise-reducing part 301 is located between the top sound inlet 101a and the top sound pickup hole, and at least a portion of the second windproof and noise-reducing part 302 is located between the side sound inlet 102a and the bottom sound pickup hole. The outer casing 100 and the microphone 200 cooperate to compress the windproof and noise-reducing cotton 300, so that the first windproof and noise-reducing part 301 and the second windproof and noise-reducing part 302 have a certain amount of pre-compression under the squeezing action of the outer casing 100 and the microphone 200.
[0020] The aforementioned directional microphone places the windproof noise-reducing cotton 300 inside the housing 100. Under the isolation and protection of the housing 100, the windproof noise-reducing cotton 300 is not easily soiled, damaged, or dislodged by external friction. Furthermore, the windproof noise-reducing cotton 300 has a first windproof noise-reducing part 301 and a second windproof noise-reducing part 302. Both the first windproof noise-reducing part 301 and the second windproof noise-reducing part 302 are compressed between the housing 100 and the microphone 200. At least a portion of the first windproof noise-reducing part 301 is located between the top sound inlet 101a and the top pickup hole, and at least a portion of the second windproof noise-reducing part 302 is located between the side sound inlet 102a and the bottom pickup hole, thereby reducing noise from the top sound inlet 101a and the side sound inlet 102a. The airflow is reduced to achieve a windproof effect. The airflow entering from the top sound inlet 101a will first pass through the first windproof noise reduction part 301 and then through the top sound pickup hole before reaching the diaphragm inside the microphone 200. The airflow entering from the side sound inlet 102a will first pass through the second windproof noise reduction part 302 and then through the bottom sound pickup hole before reaching the diaphragm inside the microphone 200. When the airflow passes through the first windproof noise reduction part 301 and the second windproof noise reduction part 302, it will be dispersed into a small and slow airflow by the micropores. Therefore, when it reaches the diaphragm, the impact force is small and it will not cause strong vibration of the diaphragm. Thus, it can alleviate the noise problem caused by the airflow entering from the top and bottom sound pickup holes, and meet the windproof noise reduction requirements of a directional microphone that picks up sound from the top and bottom at the same time.
[0021] Specifically, the illustrated embodiments are as follows: Figure 3 As shown, the top wall 101 has a first region A and a second region B surrounding the outer periphery of the first region A, with the top sound inlet 101a located in the first region A. The top surface of the microphone 200 has a third region C and a fourth region D surrounding the outer periphery of the third region C. The top sound inlet is located in the third region C. The second region B and the fourth region D cooperate to press against the first windproof and noise-reducing part 301, forming a first gap F between the first windproof and noise-reducing part 301 and the first region A, and a second gap G between the first windproof and noise-reducing part 301 and the third region C. In this way, the top pickup hole communicates with the top sound inlet hole 101a through the second gap G, the micro-hole of the first windproof noise reduction part 301, and the first gap F. The airflow entering from the top sound inlet hole 101a is first buffered in the first gap F before passing through the first windproof noise reduction part 301, and then buffered a second time in the second gap G. At the same time, the first gap F and the second gap G prevent the first windproof noise reduction part 301 from directly contacting the area of the housing 100 where the top sound inlet hole 101a is located and the area of the microphone 200 where the top pickup hole is located, thereby mitigating solid-borne sound transmission. In other words, the existence of the first gap F and the second gap G buffers the airflow and mitigates solid-borne sound transmission. The combination of these two aspects can effectively reduce or even avoid airflow noise generated during microphone amplification.
[0022] Specifically, in the illustrated embodiments, such as Figure 3 As shown, the second region B has a bottom-protruding annular boss 101b. The annular boss 101b and the fourth region D cooperate to press the first windproof and noise-reducing part 301 together. The first gap F is formed inside the enclosed space of the annular boss 101b. This design facilitates the formation of the first gap F and prevents the first windproof and noise-reducing part 301 from being squeezed by the transition rounded corner at the junction of the top wall 101 and the peripheral wall 102 (the position indicated by X in the figure), which could cause excessive deformation and affect the assembly stability and windproof and noise-reducing effect of the windproof and noise-reducing cotton 300.
[0023] Specifically, in the illustrated embodiments, such as Figure 3 As shown, the bottom end of the first windproof and noise-reducing part 301 has a recessed cavity 301a that curves upwards. Around the cavity 301a, an annular protrusion 301b is formed, which abuts against the fourth region D. The second gap G is formed within the enclosed space of the annular protrusion 301b. This design facilitates the formation of the second gap G and avoids the problem of the second gap G being too small due to compression of the first windproof and noise-reducing part 301 during assembly.
[0024] Specifically, in the illustrated embodiment, the second windproof noise reduction part 302 is a ring-shaped structure surrounding the microphone 200. The peripheral wall 102 and the surrounding side walls of the microphone 200 cooperate to compress the second windproof noise reduction part 302, thus providing comprehensive protection for the microphone 200. The second windproof noise reduction part 302 has a certain interference fit with the peripheral wall 102. For example, when the inner diameter of the peripheral wall 102 is 11.4 mm, the outer diameter of the second windproof noise reduction part 302 can be 11.8 mm, resulting in an interference fit of 0.2 mm on each side between the second windproof noise reduction part 302 and the peripheral wall 102.
[0025] Specifically, in the illustrated embodiment, the second windproof and noise-reducing part 302 and the first windproof and noise-reducing part 301 are an integral structure. More specifically, the first windproof and noise-reducing part 301 is disposed at the top of the annular second windproof and noise-reducing part 302, thus making the assembly of the windproof and noise-reducing cotton 300 and the outer shell 100 more convenient and quick. Alternatively, the first windproof and noise-reducing part 301 and the second windproof and noise-reducing part 302 can also be disposed separately, with the top of the second windproof and noise-reducing part 302 abutting against the first windproof and noise-reducing part 301.
[0026] Specifically, in the illustrated embodiments, such as Figure 1 and Figure 4As shown, the directional microphone includes a bracket 400. The bracket 400 has a support sleeve 401, and through holes 401a are provided on the four sides of the support sleeve 401. The through holes 401a are used to connect the bottom pickup hole and the side sound inlet hole 102a to meet the bottom pickup requirements of the microphone 200. A second windproof noise reduction part 302 is disposed around the support sleeve 401. More specifically, the top of the support sleeve 401 is located inside the enclosed space of the second windproof noise reduction part 302, and the through hole 401a is also located inside the enclosed space of the second windproof noise reduction part 302. The second windproof noise reduction part 302 is at least partially located between the through hole 401a and the side sound inlet hole 102a. The peripheral wall 102 and the four sides of the support sleeve 401 cooperate to compress the second windproof noise reduction part 302. In the figure, a portion of the second windproof and noise-reducing part 302 is compressed between the four side walls and the peripheral wall 102 of the microphone 200, and a portion is compressed between the four side walls and the peripheral wall 102 of the support sleeve 401.
[0027] The bottom pickup path of the microphone 200 is configured to be longer than the top pickup path of the microphone 200, resulting in a time difference when the sound received at the top and bottom is transmitted to the diaphragm. In this way, the algorithm can use this time difference to distinguish the sound received at the top and bottom, thereby achieving a directional effect of only detecting the sound coming from the top.
[0028] Specifically, in the illustrated embodiment, the bracket 400 further includes a support plate 402, which is disposed inside the support sleeve 401. The edge of the support plate 402 is connected to and integrally formed with the surrounding side walls of the support sleeve 401. A control main board 600 is mounted on the support plate 402. The control main board 600 is fixedly connected to and electrically conductive with the pins 700 leading out from the bottom of the pickup 200. The fixed connection method is not limited, and can be, for example, welding, riveting, screwing, etc.
[0029] Specifically, in the illustrated embodiments, such as Figure 3 As shown, annular steps 401b are provided on the outer circumferential surface of the side walls of the support sleeve 401. The bottom end of the second windproof and noise-reducing part 302 abuts against the annular steps 401b, which support the second windproof and noise-reducing part 302. There is a certain interference fit between the bottom end of the second windproof and noise-reducing part 302 and the annular steps 401b. That is to say, after assembly, the annular steps 401b cause a certain amount of compression to the bottom end of the second windproof and noise-reducing part 302, thus ensuring the installation reliability of the windproof and noise-reducing cotton 300.
[0030] Specifically, in the illustrated embodiments, such as Figure 3 As shown, foam 500 is provided between the top surface of the support sleeve 401 and the bottom surface of the pickup 200. In this way, on the one hand, the support sleeve 401 and the pickup 200 can be prevented from rigidly contacting each other, and on the other hand, the micropores of the foam 500 can alleviate solid-borne sound transmission between the support sleeve 401 and the pickup 200.
[0031] Specifically, the thickness of the first windproof and noise-reducing part 301 is preferably in the range of 2.5mm-3.5mm. If it is too thick, it will cause difficulty in sound pickup and large size. If it is too thin, it will not achieve the ideal windproof and noise-reducing effect. Controlling it within the above range can balance sound pickup effect, small size and windproof and noise-reducing effect.
[0032] Specifically, the thickness of the second windproof and noise-reducing part 302 is not greater than the thickness of the first windproof and noise-reducing part 301. That is, the thickness of the second windproof and noise-reducing part 302 can be equal to or less than the thickness of the first windproof and noise-reducing part 301.
[0033] Specifically, the porosity range of the first windproof noise reduction part 301 and the second windproof noise reduction part 302 is 60ppi-70ppi, for example, it can be equal to 60ppi, 65ppi, 70ppi, etc. If the porosity is too small, it will cause difficulty in sound pickup; if the porosity is too large, it will result in the failure to achieve the ideal windproof noise reduction effect. Controlling it within the above range can balance the sound pickup effect and the windproof noise reduction effect. When the porosity range of the first windproof noise reduction part 301 and the second windproof noise reduction part 302 is within the range of 60ppi-70ppi, the density of the first windproof noise reduction part 301 and the second windproof noise reduction part 302 is 50kg / m^3-60kg / m^3.
[0034] Specifically, the pickup 200 can be an electret pickup, meaning it includes electret material, which can be attached to the diaphragm. Additionally, the pickup 200 typically includes a fixed electrode, which, together with the diaphragm, forms a capacitor. When the diaphragm vibrates, the capacitance of the capacitor changes, thus completing the sound-to-electric conversion.
[0035] Specifically, in the illustrated embodiments, such as Figure 3 As shown, the peripheral wall 102 of the outer casing 100 has a first wall portion 1021 and a second wall portion 1022. Wherein, as... Figure 5 As shown, the first wall portion 1021 has an arc-shaped structure, and multiple rows (five rows are shown in the figure, but not limited to five rows) of side sound inlets 102a are provided on the first wall portion 1021, with each row of side sound inlets 102a arranged sequentially from top to bottom. A protruding wall 103 is provided on the side opposite to the first wall portion 1021, and a top wall 101 is located at the top of the first wall portion 1021 and the protruding wall 103. The top wall 101, the first wall portion 1021, and the protruding wall 103 form an integral structure, for example, they can be integrally molded. Figure 6As shown, the second wall portion 1022 is an assembled structure, assembled within the cavity formed by the first wall portion 1021, the top wall 101, and the outwardly convex wall 103. The second wall portion 1022 has an arc-shaped structure, and its alignment with the first wall portion 1021 forms a cylindrical peripheral wall 102. In the figure, the second wall portion 1022 is a metal mesh, with the mesh openings forming side sound inlets 102a. The second wall portion 1022, the top wall 101, and the outwardly convex wall 103 enclose a receiving cavity 104 with an open bottom (see figure). Figure 3 It can be used to hold electrical components such as USB flash drives.
[0036] The aforementioned directional microphone achieves excellent wind resistance, avoids a series of drawbacks of using a foam cover on the outer shell, and has a very small overall size, making it convenient to use. Its overall structure is simple and easy to assemble.
[0037] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.
Claims
1. A directional microphone, characterized in that, The directional microphone includes: The outer casing (100) has a peripheral wall (102) and a top wall (101) disposed at the top of the peripheral wall (102). The top wall (101) is provided with a top sound inlet hole (101a), and the peripheral wall (102) is provided with a side sound inlet hole (102a). A pickup (200) is located inside the housing (100). The top surface of the pickup (200) is provided with a top pickup hole communicating with the top sound inlet hole (101a), and the bottom surface of the pickup (200) is provided with a bottom pickup hole communicating with the side sound inlet hole (102a). Windproof and noise-reducing cotton (300) is located inside the outer shell (100). The outer shell (100) and the microphone (200) cooperate to compress the windproof and noise-reducing cotton (300). The windproof and noise-reducing cotton (300) includes a first windproof and noise-reducing part (301) and a second windproof and noise-reducing part (302). At least a portion of the first windproof and noise-reducing part (301) is located between the top sound inlet (101a) and the top sound pickup hole, and at least a portion of the second windproof and noise-reducing part (302) is located between the side sound inlet (102a) and the bottom sound pickup hole.
2. The directional microphone according to claim 1, characterized in that, The top wall (101) has a first region (A) and a second region (B) surrounding the outer periphery of the first region (A), and the top sound inlet (101a) is located in the first region (A). The top surface of the pickup (200) has a third region (C) and a fourth region (D) surrounding the outer periphery of the third region (C), and the top pickup hole is located in the third region (C). The second region (B) and the fourth region (D) cooperate to press the first windproof and noise-reducing part (301), forming a first gap (F) between the first windproof and noise-reducing part (301) and the first region (A), and forming a second gap (G) between the first windproof and noise-reducing part (301) and the third region (C).
3. The directional microphone according to claim 2, characterized in that, The second region (B) is provided with an annular boss (101b) that protrudes downwards. The annular boss (101b) and the fourth region (D) cooperate to press the first windproof and noise-reducing part (301). The first gap is formed inside the enclosed space of the annular boss (101b).
4. The directional microphone according to claim 2, characterized in that, The bottom surface of the first windproof and noise reduction part (301) is provided with a recessed cavity (301a) that is recessed upwards. A ring-shaped protrusion (301b) is formed around the cavity (301a). The ring-shaped protrusion (301b) abuts against the fourth region (D). The second gap (G) is formed inside the enclosed space of the ring-shaped protrusion (301b).
5. The directional microphone according to any one of claims 1-4, characterized in that, The second windproof and noise reduction part (302) is arranged around the microphone (200). The peripheral wall (102) and the surrounding side walls of the microphone (200) cooperate to press the second windproof and noise reduction part (302). The top of the second windproof and noise reduction part (302) is fixedly connected to or integrally arranged with the first windproof and noise reduction part (301).
6. The directional microphone according to claim 5, characterized in that, The directional microphone includes a bracket (400) with a support sleeve (401). The second windproof noise reduction part (302) is also arranged around the support sleeve (401). The peripheral wall (102) and the peripheral side wall of the support sleeve (401) cooperate to press the second windproof noise reduction part (302). The peripheral side wall of the support sleeve (401) is provided with a through hole (401a) for connecting the bottom pickup hole and the side sound inlet hole (102a). At least part of the second windproof noise reduction part (302) is located between the through hole (401a) and the side sound inlet hole (102a).
7. The directional microphone according to claim 6, characterized in that, Foam (500) is provided between the top surface of the support sleeve (401) and the bottom surface of the pickup (200).
8. The directional microphone according to claim 6, characterized in that, The support sleeve (401) has an annular step (401b) on the outer side of its four sides. The bottom end of the second windproof and noise-reducing part (302) abuts against the annular step (401b), and there is a certain interference between the bottom end of the second windproof and noise-reducing part (302) and the annular step (401b).
9. The directional microphone according to any one of claims 1-4, characterized in that, The thickness of the first windproof and noise reduction part (301) is in the range of 2.5mm-3.5mm, and the thickness of the second windproof and noise reduction part (302) is not greater than the thickness of the first windproof and noise reduction part (301).
10. The directional microphone according to any one of claims 1-4, characterized in that, The porosity range of the windproof and noise-reducing cotton (300) is 60ppi-70ppi.