microphone

Abstract

Provided is a microphone capable of being mounted on a moving body and capable of reducing wind noise during sound collection. A microphone (1) is mounted on a moving body and includes a microphone unit (102) that collects external sound, a housing (10) having an opening portion (10a) provided on a side surface in a direction of travel of the moving body, the opening portion (10a) communicating with a housing portion (101) that houses the microphone unit (102), and a windproof portion (11) provided on the side surface of the housing (10), the windproof portion (11) being installed in the direction of travel of the moving body as viewed from the opening portion (10a).

Description

Technical Field

[0001] This invention relates to microphones. Background Technology

[0002] Previously, as a technology for microphones in situations affected by wind, there are known microphone covers and high-speed airflow noise prevention microphone devices. The microphone cover allows sound waves to pass through while suppressing pressure changes caused by wind inside the cover. The high-speed airflow noise prevention microphone device detects sound in high-speed airflow in a manner that does not produce microphone self-sound (see, for example, Patent Documents 1 and 2). Existing technical documents Patent documents

[0003] Patent Document 1: International Publication WO2015 / 015646 Patent Document 2: Japanese Patent No. 5044798 Summary of the Invention

[0004] In this regard, wind is a source of noise for microphones, and the constant challenge for outdoor sound collection is how to avoid wind. This is especially true for vehicles engaged in high-speed activities such as racing, where even without wind caused by the weather, relatively strong air currents are generated, making it difficult to mount microphones on the vehicle for sound collection. This is because if a microphone is directly impacted by strong winds, its sound will cancel out the target sound. Therefore, in the past, microphones were wrapped in porous materials to prevent wind from directly impacting them. However, this method can lead to sound quality degradation due to the sound absorption properties of porous materials. Furthermore, for competitive sports such as motorsports, it is desirable to use small microphones. If the microphone becomes too large, it will inevitably become an obstacle to the sport itself, such as increasing air resistance, adding weight, and hindering image capture, or, depending on the situation, making its installation impossible.

[0005] One of the objectives of this invention is to provide a microphone that can be mounted on a mobile body and can reduce wind noise during sound collection.

[0006] The microphone of the present invention is mounted on a mobile body and includes: a microphone unit for collecting external sound; a housing having an opening on a side along the traveling direction of the mobile body, the opening communicating with a receiving portion for accommodating the microphone unit; and a windproof portion located on the side of the housing, the windproof portion being mounted in the traveling direction of the mobile body as viewed from the opening. Invention Effects

[0007] The microphone of this invention can be mounted on a moving body and can reduce wind noise during sound collection. Attached Figure Description

[0008] Figure 1 This is a perspective view of the microphone of Embodiment 1 of the present invention, viewed from the front side. Figure 2 This is a perspective view of the microphone of Embodiment 1 as seen from the rear side. Figure 3 This is a front view of the microphone in Embodiment 1 described above. Figure 4 This is a perspective view of the microphone holder that constitutes Embodiment 1 described above. Figure 5 This is a cross-sectional view along line A-A, with the internal mechanism of the microphone in Embodiment 1 partially omitted. Figure 6 This is a three-dimensional view of the fixing component that secures the microphone unit inside the housing. Figure 7 This is a graph showing the frequency characteristics of the microphone in Embodiment 1 described above. Figure 8 This is a perspective view of the microphone of Embodiment 2 of the present invention, viewed from the front side. Figure 9 This is a perspective view of the microphone of Embodiment 3 of the present invention, viewed from the front side. Figure 10 This is a perspective view of the microphone of Embodiment 4 of the present invention, viewed from the front side. Figure 11 This is a perspective view of the microphone of Embodiment 4 of the present invention, viewed from the rear side. Figure 12 This is a perspective view of the microphone of Embodiment 5 of the present invention, viewed from the front side. Figure 13 This is a perspective view of the microphone of Embodiment 5 of the present invention, viewed from the rear side. Figure 14 This is a perspective view of the microphone of Embodiment 6 of the present invention, viewed from the front side. Detailed Implementation

[0009] The microphone according to an embodiment of the present invention will be described below. The microphone of the present invention is a device mounted on a moving body to collect external sound. Figure 1 The microphone 1 shown is one example. A mobile body is an object used for the purpose of moving in a predetermined direction, such as two-wheeled or four-wheeled vehicles, snowmobiles, ships, jet skis, aircraft, drones, autonomous mobile robots, etc. This mobile body can be an object driven by either machinery or human power, and can be a person or an animal. Furthermore, regardless of whether it is for passenger use, the mobile body can move to any location on land, water, or in the air. Furthermore, in the following description, unless otherwise specified, the predetermined direction of movement of the moving body will be defined as the direction of travel. In each figure, the x-direction is the direction of travel of the moving body. In addition, sometimes the side with the direction of travel of microphone 1 is referred to as the front, and the side opposite to the direction of travel of microphone 1 is referred to as the rear.

[0010] In this embodiment, external sound refers to the target sound that is the object of sound collection. In the example where microphone 1 is used for motorsports, the target sound is imagined to be the engine sound of the vehicle, cheers, or conversations between the driver and staff.

[0011] Regarding its installation, microphone 1 can be mounted as a separate unit on the mobile device, or it can be manufactured as an integral part of the mobile device. Additionally, microphone 1 can also be mounted on helmets worn by people walking, running, or engaging in activities such as extreme skydiving and skiing.

[0012] Furthermore, a camera or other imaging unit, such as a CCD camera, can also be provided on the microphone 1 as another functional component. For example, the imaging unit can be integrated into the upper part of the microphone 1 to capture images in the direction of travel. Example 1

[0013] like Figure 1 as well as Figure 5 As shown, the microphone 1 of Embodiment 1 has a housing 10, a microphone unit 102, and a windproof part 11.

[0014] ● Casing 10 like Figure 5 As shown, the housing 10 has a hollow receiving portion 101, which houses the microphone unit 102 and electrical circuits, etc. The housing 10 is preferably made by machining a solid material, such as aluminum alloy, and is lightweight and makes it difficult to transmit vibrations caused by wind to the microphone unit 102. The housing 10 mounts the microphone 1 at a designated location on the moving body and is connected to the moving body by screws or other connecting parts, or is attached to the moving body by adhesive. Alternatively, the housing 10 and the moving body can be formed integrally.

[0015] In the housing 10, the length in the width direction orthogonal to the direction of travel is shorter than the length in the direction of travel. Furthermore, the end of the housing 10 on the direction of travel side is V-shaped when viewed from above, with its width gradually increasing from front to rear. As a result, the airflow blowing onto the microphone 1 as the moving object moves flows smoothly across the surface of the housing 10 from front to rear, suppressing air resistance generated by the housing 10 when the moving object moves.

[0016] like Figure 1 as well as Figure 2As shown, an opening 10a communicating with the receiving portion 101 is provided on the side surface (the surface in the y direction) of the housing 10 and on the side surface along the travel direction of the moving body. The opening 10a is positioned orthogonal to the direction of travel of the moving body or facing behind the direction of travel of the moving body compared to the orthogonal direction. As a result, the wind blowing towards the microphone 1 from the direction of travel as the moving body moves will not directly enter the opening 10a. The opening 10a has a pair of openings on both sides in the width direction (y direction) perpendicular to the direction of travel of the moving body. As a result, the microphone 1 collects external sound from the left and right sides of the direction of travel of the moving body to obtain stereo sound.

[0017] Furthermore, the opening 10a can also be covered by a mesh component. The mesh component can be, for example, a sheet made of fibrous or metallic materials that allows external sound to reach the microphone unit 102 within the housing 101. Additionally, the mesh component can be hydrophobic. Hydrophobicity can be inherent in the material of the mesh component itself, or it can be achieved through a hydrophobic treatment. This prevents rainwater from entering the opening 10a.

[0018] ●Microphone Unit 102 like Figure 5 As shown, the microphone unit 102, together with the electrical circuit, is housed within the housing 10 to collect external sound. The microphone unit 102 is omnidirectional, enabling it to collect external sound entering the housing 101 through the opening 10a. The microphone unit 102 is connected to the electrical circuit, which processes the electroacoustic converted sound signal from the microphone unit 102. Furthermore, the electroacoustic conversion method of the microphone unit 102 can be arbitrary, for example, it can be a condenser type or a dynamic type. Additionally, the data processed by the electrical circuit is transmitted to an external device, for example, via wireless communication. Furthermore, terminals that can be wiredly connected to the electrical circuit may be provided at designated locations on the housing 10.

[0019] A pair of microphone units 102 are provided corresponding to the openings 10a provided on both sides of the housing 10. The pair of microphone units 102 are generally cylindrical in shape and are provided with a sound collection section 1021 at the end for collecting external sound. Furthermore, with a pair of microphone units 102 mounted on the mobile body, the sound collecting section 1021 is held in a rearward and obliquely sideways direction relative to the direction of travel of the mobile body. On the other hand, the ends opposite to the side where the sound collecting section 1021 is located are obliquely received from the opening 10a towards the front in a manner close to each other. As a result, the width of the housing 10 can be reduced, and the wind resistance experienced by the housing 10 due to the movement of the mobile body can be reduced.

[0020] Furthermore, with the pair of microphone units 102 mounted on the moving body, the sound collection section 1021 is positioned so as to face downwards at an angle relative to the direction of travel of the moving body. As a result, moisture such as rainwater is difficult to seep in from the outside through the opening 10a.

[0021] The microphone unit 102 is fixed within the receiving portion 101 by a fixing member 103. A fixing member 103 is disposed within the receiving portion 101 to fill the space within the receiving portion 101 of the housing 10. This fixing member 103 houses the microphone unit 102 within the inner hollow portion 1031. An O-ring 104 is provided between the inner wall of the hollow portion 1031 and the outer side of the microphone unit 102. The O-ring 104 fills the gap between the inner wall of the hollow portion 1031 and the outer side of the microphone unit 102, thus fixing the microphone unit 102 within the hollow portion 1031. The O-ring 104 is, for example, made of elastic or flexible rubber. This prevents the microphone unit 102 from shaking within the hollow portion 1031, making it difficult for the housing 10 to transmit fixed vibrations, and preventing sound degradation caused by fixed vibrations.

[0022] like Figure 6 As shown, the fixing member 103 is composed of a base 1032 on one end side and a pair of ends 1033 branching from the base 1032 in a bifurcated shape. An opening 1032a is provided at the front of the base 1032. Wiring connected to the microphone unit 102 housed in the hollow portion 1031 extends outward from the opening 1032a and connects to the electrical circuit housed in the housing 10.

[0023] A connecting hole 1034 is formed on the end face of the end portion 1033, communicating with the opening 10a and the hollow portion 1031. The connecting hole 1034 is located at the rear end of the hollow portion 1031 in the traveling direction and is positioned corresponding to the sound collecting unit 1021. The connecting hole 1034 is smaller than the opening 10a and protrudes outward from the opening 10a of the housing 10 when the fixing member 103 is housed in the housing 10. External sound is collected by the microphone unit 102 inside the hollow portion 1031 through the connecting hole 1034.

[0024] Furthermore, the connecting hole 1034 has a first connecting hole 10341 and a second connecting hole 10342. The first connecting hole 10341 is connected to the opening 10a. The second connecting hole 10342 connects the first connecting hole 10341 and the hollow portion 1031. The diameter of the second connecting hole 10342 is smaller than the diameter of the first connecting hole 10341, and the connecting hole 1034 exhibits a layer difference at the boundary between the first connecting hole 10341 and the second connecting hole 10342. In addition, at least the diameter of the second connecting hole 10342 is smaller than the diameter of the sound collecting portion 1021. With this configuration, resonance in the connecting hole 1034 can be reduced, thus enabling more precise sound collection from the outside. Furthermore, although in this embodiment the diameter of the connecting hole 1034 is the same throughout its entire length in the axial direction, its diameter may also be smaller than the diameter of the sound collecting part 1021.

[0025] On the upper and lower surfaces of the fixing member 103 in its accommodated state, screw holes 1035 are respectively provided for connecting the fixing member 103 within the accommodating portion 101 by screw fastening or the like. Correspondingly, within the accommodating portion 101 of the housing 10, a screw hole is provided for a screw to be inserted through and screwed into the screw hole 1035. The screw inserted through and screwed into the screw hole 1035 engages with the screw hole, thereby fastening the fixing member 103 within the accommodating portion 101. Furthermore, the screw hole 1035 may be provided only on one of the upper or lower surfaces of the fixing member 103. In addition, the fixing member 103 within the accommodating portion 101 may also be fixed by a connection method other than screw fastening, such as adhesive bonding.

[0026] The fixing member 103 is housed within the receiving portion 101, thus filling the space within the receiving portion 101. The fixing member 103 is also secured within the receiving portion 101 by an O-ring 104, thereby preventing resonance within the receiving portion 101 for the microphone 1. Furthermore, by isolating the microphone unit 102 from the housing 10 through the fixing member 103, vibrations and temperatures from the housing 10 are not directly transmitted to the microphone unit 102, suppressing the effects of vibration and temperature and enabling clean external sound collection. In addition, corresponding to the length of the connecting hole 1034, the opening 10a and the sound collecting part 1021 are separated, so that moisture such as rainwater and dust are difficult to reach the sound collecting part 1021, thus preventing the sound collecting part 1021 from deteriorating and being damaged.

[0027] ●Windproof section 11 like Figure 1 as well as Figure 2 As shown, the windproof part 11 is located on the side of the housing 10, and the direction of travel of the moving body is viewed from the opening 10a. like Figure 3 as well as Figure 4 As shown, the windproof part 11 has a main body 12 and a retainer 13 for holding the main body 12.

[0028] The main body 12 is made of a porous material such as polyurethane foam. The main body 12 is held by the retainer 13 and withstands and allows wind blowing onto the microphone 1 as the moving body moves. As a result of the main body 12 withstanding the wind, the wind force is sufficiently attenuated before reaching the opening 10a, suppressing wind noise. Furthermore, as long as the main body 12 is made of a flexible material such as polyurethane foam, vibrations generated by the wind are absorbed by the main body 12, and solid vibrations are not transmitted to the microphone unit 102. Additionally, the main body 12 can also be made of materials such as artificial fur.

[0029] The retainer 13 is composed of multiple thin plate-shaped retaining sheets 1311, 1312, 1313, and 1314 and a thin plate-shaped connecting sheet 132 that integrally connects these retaining sheets. The retainer 13 is made of rigid materials such as metal and plastic. Furthermore, in the description of this embodiment, when it is not necessary to distinguish each of the multiple retaining sheets 1311, 1312, 1313, and 1314, they are sometimes referred to as "retaining sheet 131".

[0030] Each retaining plate 131 is generally semi-circular in shape and is separated from each other in the thickness direction (z-direction). Each retaining plate 131 is arranged such that its length direction is along the travel direction of the moving body. As a result, the wider surface of each retaining plate 131 faces approximately the vertical direction (z-direction), thus avoiding wind resistance generated by the movement of the moving body.

[0031] The side edges 1311a, 1312a, 1313a, and 1314a of each retaining piece 131, which are disposed on the side of the housing 10, are formed in a shape that conforms to the shape of the side of the housing 10. The side edges 1311a, 1312a, 1313a, and 1314a are connected to the first surface of the connecting piece 132 with the larger width. The wider second side, opposite to the first side of the connecting piece 132, is shaped to match the side profile of the housing 10. This second side is directly bonded to the side profile of the housing 10 using an adhesive or by using an adhesive tape. As a result, the retainer 13 is mounted to the side profile of the housing 10 without gaps, and is therefore not easily detached even by wind generated by the movement of the accompanying moving body.

[0032] In each retaining piece 131, retaining pieces 1312 and 1313 located between retaining pieces 1311 and 1314, locking holes 1312b and 1313b are respectively provided for the main body 12 to pass through and be locked. The locking holes 1312b and 1313b open in the vertical direction (z-direction) orthogonal to the direction of travel. Furthermore, no holes corresponding to the locking holes 1312b and 1313b are formed on the retaining pieces 1311 and 1314. Therefore, the main body 12 will not disengage vertically within the range from retaining piece 1311 to retaining piece 1314, and is locked in a state of being inserted into the locking holes 1312b and 1313b. Additionally, as... Figure 3 As shown, when the main body 12 is locked with the locking holes 1312b and 1313b, it is exposed from between each retaining piece 131 toward the direction of travel, and this part is exposed to wind. In addition, in this embodiment, there are four retaining pieces 131, but the number is not limited.

[0033] like Figure 2 As shown, the windproof portion 11 is installed in the direction of travel of the moving body when viewed from the opening 10a. Therefore, the opening 10a is exposed to the outside without being covered by the windproof portion 11. Furthermore, the vertical length of the opening 10a is the same as or shorter than the length between the retaining plates 1312 and 1313. Moreover, when viewed from the direction of travel of the moving body, the opening 10a is located in a position partially hidden by the retaining plates 1312 and 1313 of the main body 12. Therefore, wind blowing towards the opening 10a from the direction of travel of the moving body is reliably attenuated by the main body 12 before reaching the opening 10a.

[0034] In the microphone 1 of this embodiment, the opening 10a is not covered by the windproof portion 11, thereby preventing degradation of the sound quality of the target sound. Furthermore, the wind blowing on the microphone 1 as the moving body moves is attenuated by the main body 12 as it flows through it, thus suppressing wind noise. Additionally, the retaining body 13 is composed of multiple retaining plates 131, thereby dividing wind vortices into smaller vortices and preventing the formation of large vortices. Moreover, its compact size allows for easy mounting on a moving body. It does not hinder the use of the moving body and effectively suppresses air resistance generated during movement.

[0035] ●Frequency characteristics Figure 7This is a graph representing the frequency characteristics of the sound during sound collection, showing experimental results comparing the acoustic characteristics (line m1) of microphone 1 with the windproof part 11 and the acoustic characteristics (line m2) of microphone 1 without the windproof part 11. Furthermore, in this experiment, a blower was placed in front of both microphone 1 with and without the windproof part 11 to reproduce an environment where wind generated by movement blows onto a moving object. The experiment demonstrated a sound pressure level difference across a wide frequency range. Specifically, a sound pressure level difference of approximately 10 dB was observed below 5 kHz, significantly reducing wind noise. Furthermore, the peak around 10 kHz corresponds to the peak sound emitted by the hair dryer used in the experiment. Example 2

[0036] Figure 8 Microphone 2 in Example 2. The microphone 2 has a housing 10, a microphone unit 102, and a windproof part 21. The difference between the construction of the microphone 2 and that of Embodiment 1 is that the windproof part 21 is different from the windproof part 11 of the microphone 1 described above. Furthermore, the housing 10 and microphone unit 102 are constructed with the same structure as the housing and microphone unit of the microphone 1 in Embodiment 1 described above, and are therefore labeled with the same reference numerals. Additionally, in the following description, we will primarily describe the structure that differs from that of the microphone 1; other parts have the same structure as the microphone 1. The same applies to these points after Embodiment 3.

[0037] The windproof part 21 is installed on the side of the housing 10 in such a way as to cover the opening 10a. The windproof part 21 has a main body 22 and a retaining body 23 for holding the main body 22.

[0038] The main body 22, like the main body 12 in Embodiment 1, is made of a porous material and is held by a retainer 23. In this embodiment, viewed from the opening 10a, the main body 22 is positioned in front of and behind the moving body in the direction of travel.

[0039] The retainer 23 is composed of a plurality of thin plate-shaped retaining pieces 2311, 2312, 2313, 2314 and a thin plate-shaped connecting piece 232 that integrally connects these retaining pieces. In addition, in the description of this embodiment, without individually distinguishing the plurality of retaining pieces 2311, 2312, 2313, 2314, they are sometimes referred to as "retaining piece 231".

[0040] Each retaining piece 231 is similar to the retaining piece 131 in Embodiment 1, and is generally semi-circular in shape, and is separated from each other in the thickness direction (z direction). In addition, each retaining piece 231 is arranged such that its length direction is along the travel direction of the moving body.

[0041] On the other hand, in this embodiment, the length of each retaining piece 231 along the travel direction of the moving body is greater than the length of the retaining piece 131 in Embodiment 1. Thus, each retaining piece 231 is mounted on the side of the housing 10 in such a way that it crosses the opening 10a or its vicinity. Each retaining piece 231 has a locking hole 2312a, 2312b, 2313a, 2313b on its retaining pieces 2312 and 2314, respectively, for inserting and locking a pair of main bodies 22. Viewed from the opening 10a, the locking holes 2312a and 2313a are located on each retaining piece 2312 and 2313 in the forward direction of the moving body. Viewed from the opening 10a, the locking holes 2312b and 2313b are located on each retaining piece 2312 and 2313 in the rearward direction of the moving body. These locking holes 2312a, 2312b, 2313a, and 2313b, like the locking holes 1312b and 1313b in Embodiment 1, open in a vertical direction (z-direction) orthogonal to the direction of travel. Thus, the pair of main bodies 22 are locked in front of and behind the moving body in the direction of movement of the moving body as seen from the opening 10a, respectively, by being inserted into the locking holes 2312a, 2312b, 2313a, and 2313b.

[0042] Furthermore, on the connecting piece 232 that connects each retaining piece 231, an opening is formed at a position corresponding to the opening 10a, exposing the opening 10a to the outside (illustration omitted). As a result, the opening 10a is not covered by the windproof part 21, and the target sound is collected without deterioration.

[0043] According to the microphone 3 of this embodiment, the influence of wind noise generated by the movement of the moving body can be suppressed when the movement direction of the moving body changes to either forward or backward. In addition, even if the movement direction of the moving body is in the (+x) direction, the influence of wind noise from the (-x) direction caused by the moving body can be suppressed. Example 3

[0044] Figure 9 Microphone 3 is shown in Example 3. The microphone 3 has a housing 10, a microphone unit 102, and a windproof part 31. The difference between the construction of this microphone 3 and that of Embodiment 1 is that the windproof part 31 is different from the windproof part 11 of the microphone 1 described above.

[0045] The windproof part 31 is installed on the side of the housing 10 in such a way as to cover the opening 10a. The windproof part 31 has a main body 32 and a retaining body 33 for holding the main body 32.

[0046] The main body 32, like the main body 12 of Embodiment 1, is made of a porous material and is held by a retainer 33. In this embodiment, the main body 32 has an opening 32a at approximately the center that is adapted to the shape of the opening 10a. Thus, when the main body 32 is held by the retainer 33, the main body 32 is positioned around the opening 10a.

[0047] The retainer 33 is composed of a plurality of thin plate-shaped retaining pieces 3311, 3312, 3313, 3314 and a thin plate-shaped connecting piece (not shown) that integrally connects these retaining pieces. In addition, in the description of this embodiment, without individually distinguishing the plurality of retaining pieces 3311, 3312, 3313, 3314, they are sometimes referred to as "retaining piece 331".

[0048] Each retaining piece 331, like the retaining piece 131 in Embodiment 1, is generally semi-circular in shape and is separated from each other in the thickness direction (z direction). In addition, each retaining piece 331 is arranged such that its length direction is along the travel direction of the moving body.

[0049] On the other hand, in this embodiment, each retaining piece 331, like the retaining piece 231 in Embodiment 2, has a longer length along the travel direction of the moving body than the retaining piece 131 in Embodiment 1. Thus, each retaining piece 331 is mounted on the side of the housing 10 in a manner that spans or near the opening 10a. Each retaining piece 3312 and 3313, located between retaining pieces 3311 and 3314, has a locking hole 3312a and 3313a for the main body 32 to pass through and lock in place. Viewed from the opening 10a, the locking holes 3312a and 3313a on each retaining piece 2312 and 2313 have a range from the front to the rear in the direction of movement of the moving body. Similar to the locking holes 1312b and 1313b in Embodiment 1, the locking holes 3312a and 3313a open in a vertical direction (z-direction) orthogonal to the direction of travel. Thus, the main body 32 is inserted into the locking holes 3312a and 3313a while the opening 10a is exposed outward through the opening 32a, and is locked in place while covering the area around the opening 10a.

[0050] Furthermore, on the connecting piece (not shown) that connects each retaining piece 231, similar to the connecting piece 232 in Embodiment 2, an opening (not shown) is formed at the position corresponding to the opening 10a, exposing the opening 10a to the outside. As a result, the opening 10a is not covered by the windproof part 31, and sound is collected from the outside without deterioration.

[0051] According to the microphone 2 of this embodiment, the influence of wind noise generated by the movement can be suppressed when the movement direction of the moving body changes to any direction, such as forward, backward, upward, or downward. In addition, the influence of wind noise caused by winding around can be suppressed regardless of the movement direction of the moving body. Moreover, it can suppress not only the influence of wind blowing from the movement direction of the moving body, but also the influence of wind noise generated by wind blowing along the side of the housing 10 toward the opening 10a. Example 4

[0052] Figure 10 as well as Figure 11 Microphone 4 is shown in Example 4. The microphone 4 has a housing 10, a microphone unit 102, and a windproof part 41. The difference between the construction of this microphone 4 and that of Embodiment 1 is that the windproof part 41 is different from the windproof part 11 of the microphone 1 described above.

[0053] The windproof part 41 is located on the side of the housing 10, and the direction of travel of the moving body can be seen from the opening 10a. The windproof part 41 is a thin plate-shaped component made of rigid materials such as metal and plastic. This windproof part 41 is composed of a protruding piece that extends from the side of the housing 10 along the width direction of the housing 10. In particular, in this embodiment, the windproof part 41 is designed to gradually extend rearward as it moves upward from below the housing 10 when installed in the housing 10. Furthermore, the windproof part 41 has a length from the front to the rear of the opening 10a, and its wide front surface, opposite to the traveling direction of the moving body, forms a gently curved surface. Therefore, when viewed from the traveling direction of the moving body, the opening 10a is shielded by the windproof part 41.

[0054] According to the microphone 4 of this embodiment 4, the wind generated by the movement of the moving body is blocked by the windproof part 41 and will not blow directly onto the opening 10a. As a result, the wind noise generated by the movement of the moving body is suppressed. In addition, the influence of wind that enters from above the opening 10a can be suppressed, and it can also be rainproof when used outdoors. Moreover, the wind blowing along the movement of the moving body flows backward along the curved shape of the windproof part 41, suppressing wind resistance. Example 5

[0055] Figure 12 as well as Figure 13 Microphone 5 is shown in Example 5. The microphone 5 has a housing 10, a microphone unit 102, and a windproof part 51. The microphone 5 differs from that in embodiment 4 in that it has an intake port 511.

[0056] The windproof part 51 has the same overall shape as the windproof part 41 of Embodiment 4, and is installed in the same position as the windproof part 41 relative to the housing 10. On the other hand, the windproof part 51 has an air intake 511. The inlet 511 is a through hole extending along the travel direction of the moving body. The inlet 511 has a first opening 5111 formed on the side of the moving body in the travel direction, and a second opening 5112 formed on the side opposite to the travel direction of the moving body. The first opening 5111 opens near the side of the housing 10, and the second opening 5112 opens far from the side of the housing 10. Thus, the air blowing onto the microphone 5 as the moving body moves passes from the first opening 5111 to the second opening 5112, which is located far from the opening 10a.

[0057] According to the microphone 5 of this embodiment 5, when the moving body moves, the blowing air passes through the intake 511, thereby suppressing air resistance. In addition, the air entering the intake 511 exits at a position 10a away from the opening, thereby suppressing the influence of wind noise. Example 6

[0058] Figure 14 The microphone 6 in Example 6 is shown. The microphone 6 has a housing 10, a microphone unit 102, and a windproof part 61. The microphone 6 differs from the one in embodiment 5 in that the intake 611 is different from the intake 511 of the microphone 5 described above, and it has a notch 612.

[0059] The windproof section 61 has the same overall shape as the windproof section 61 of Embodiment 5 and is installed in the same position as the windproof section 61. On the other hand, the access port 611 of the windproof section 61 is divided into a plurality of access ports 611a. Each access port 611a extends along the direction of travel of the moving body. The wind blowing to the microphone 6 as the moving body moves passes through each access port 611a from front to back along the direction of travel of the moving body. Dividing the intake 611 into multiple smaller intakes 611a prevents the inherent resonance within the intake 611a from becoming too high-frequency. Furthermore, wind passing through the intake 611a to the rear does not generate large vortices.

[0060] At the end of the windproof section 61, located far from the housing 10, there are multiple notches 612. Each notch 612 is formed by a triangular notch in the thickness of the windproof section 61. Wind blowing from the direction of travel is broken into small vortices by these notches 612. This prevents the formation of large wind vortices.

[0061] According to the microphone 6 of this embodiment 6, when the moving body moves, the wind blowing onto the microphone 6 is decomposed into small vortices. As a result, it is possible to prevent the generation of large wind noise.

[0062] Furthermore, in the above embodiments 1 to 6, the windproof parts 11, 21, 31, 41, 51, and 61 are installed on the side of the housing 10. However, in other embodiments, they may be integrally formed with the housing 10. In embodiments 1 to 3, the main bodies 12, 22, and 32, made of porous material, are held by retainers 13, 23, and 33. However, in other embodiments, retainers 13, 23, and 33 may be omitted, allowing the main bodies 12, 22, and 32 to be directly bonded to the side of the housing 10. The bonding method can employ various methods, such as adhesive-based bonding or bonding via adhesive tape.

[0063] Furthermore, although the present invention has been described through various embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and alterations can be made within its spirit and scope. Embodiments formed by arbitrarily combining multiple embodiments and embodiments formed by arbitrarily combining parts of various embodiments are also included in the embodiments of the present invention. The effects of new embodiments resulting from combinations also possess the effects of the original embodiments. Explanation of reference numerals in the attached figures

[0064] 1: Microphone 10: Shell 10a: Opening 101: Reception Department 102: Microphone Unit 11: Windbreak Department 12: Main Body 13: Maintain body 131: Keeping tablets 2: Microphone 21: Windbreak Department 22: Main Body 23: Maintain body 231: Retention Tablet 3: Microphone 31: Windbreak Department 32: Main Body 33: Maintain body 331: Retention Tablet 4: Microphone 41: Windbreak Department 5: Microphone 51: Windbreak Department 511: Take the entrance 6: Microphone 61: Windbreak Department 611: Take the entrance 611a: Take the entry point.

Claims

1. A microphone, wherein, The microphone is mounted on the moving body and has the following features: A microphone unit that collects external sounds; A housing with an opening on the side along the direction of travel of the moving body, the opening being connected to a receiving portion that houses the microphone unit; and The windproof part located on the side of the housing is installed in the direction of travel of the moving body when viewed from the opening.

2. The microphone according to claim 1, wherein, The windproof part has: The body is made of porous material; and A retainer is provided along the direction of travel of the moving body and holds the main body.

3. The microphone according to claim 2, wherein, The retainer has multiple retaining plates. At least a portion of the retaining plates are provided with locking holes for the main body to pass through and lock in place.

4. The microphone according to claim 2, wherein, Viewed from the opening, the main body is held in the direction of travel of the moving body, or in front of or behind the direction of travel of the moving body, by means of the retaining body.

5. The microphone according to claim 1, wherein, The windproof part is composed of a protruding piece that extends from the side of the housing along the direction of travel of the moving body.

6. The microphone according to claim 5, wherein, The windproof section has an air intake port along the direction of travel of the moving body.

7. The microphone according to claim 6, wherein, The entry point is divided into multiple sections.

8. The microphone according to claim 1, wherein, The windproof part is made of porous material.

9. The microphone according to claim 1, wherein, The opening is positioned at a right angle relative to the direction of travel of the moving body, or relative to the direction of travel of the moving body, and is oriented towards the rear of the direction of travel of the moving body.

10. The microphone according to claim 1, wherein, The opening is provided on both sides in a width direction that is approximately right-angled with the direction of travel of the moving body.

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