A sound pickup device for reducing wind noise

Abstract

The present invention relates to the technical field of pickups, and discloses a sound pickup device for reducing wind noise, including a microphone. The microphone is installed on a spherical shell, and a plurality of arc-shaped plates are uniformly installed on the spherical shell. Side plates fixed to the surface of the spherical shell are installed on the sides of the arc-shaped plates. An arc-shaped air guiding channel is formed among the arc-shaped plates, the spherical shell and the side plates. A guiding plate is installed at the bottom of the arc-shaped plate, and an air outlet channel is arranged in the guiding plate. Notches are arranged at the positions corresponding to the air guiding channels on the outer periphery of the spherical shell, and the microphone is installed in the notches. Through the air guiding channel formed by the cooperation of the arc-shaped spherical shell and the arc-shaped plates, air flow and sound enter the air guiding channel through the through openings. Affected by the Coanda effect, the air flow will adhere to the inner wall of the arc-shaped plate and move, and most of the air flow will not flow towards the microphone. Since sound belongs to waves, it is not restricted. The microphone installed on the spherical shell can still normally receive sound, ensuring the stability of the audio quality received by the microphone and achieving a good wind noise reduction effect.

Description

Technical Field

[0001] The present invention relates to the technical field of pickups, and specifically to a sound pickup device for reducing wind noise. Background Art

[0002] A pickup is a component used to collect on-site sounds, an electroacoustic instrument that relies on receiving sound vibrations and amplifying the sound. When a pickup is used in an environment, it will be affected by the airflow in the environment, resulting in wind noise. The professional name of wind noise is aerodynamic noise, which is generated by the interaction between moving objects in a flow field or by the interaction between fluids caused by the turbulent motion of the fluid itself.

[0003] Wind noise will have a significant impact on the audio quality collected by the pickup. Currently, the noise reduction treatment for wind noise mainly focuses on the physical aspect, that is, modifying the pickup or adding noise reduction components, and the algorithm aspect. The most commonly used in the physical aspect are various microphone windshields, which are made of a variety of materials such as sponge, artificial fur, and iron mesh. The principle is mainly to reduce the air flow velocity near the microphone diaphragm, disperse the air flow and reduce the generation of turbulence, and the effect is equivalent to an acoustic low-pass filter. While this kind of windshield reduces wind noise, it will also weaken the sound to be collected to a certain extent. At the same time, this kind of windshield is easy to hide dust and is cumbersome to clean and maintain. Summary of the Invention

[0004] Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a sound pickup device for reducing wind noise, which has the advantages of simple structure, good wind noise reduction effect, and convenient maintenance, and solves the problems in the background art.

[0006] To solve the above problems, the present invention provides the following technical solutions:

[0007] A sound pickup device for reducing wind noise includes a microphone, the microphone is installed on a spherical shell, a plurality of arc-shaped plates are evenly installed on the spherical shell, side plates fixed to the surface of the spherical shell are installed on the sides of the arc-shaped plates, an arc-shaped air guiding channel is formed between the arc-shaped plates, the spherical shell and the side plates, a guiding plate is installed at the bottom of the arc-shaped plate, an air outlet channel is arranged in the guiding plate, a through opening communicating with the air guiding channel is reserved between the tops of the plurality of arc-shaped plates, and a notch corresponding to the position of the air guiding channel is arranged on the outer periphery of the spherical shell, and the microphone is installed in the notch.

[0008] Preferably, the arc-shaped plate and the spherical shell are concentric.

[0009] Preferably, a connecting sleeve with an internal connection is installed at the bottom of the spherical shell, and the data cable of the microphone passes through the connecting sleeve.

[0010] Preferably, a top cover is installed at the position of the through opening.

[0011] Preferably, the top cover includes a cover plate, and through holes are evenly arranged on the cover plate.

[0012] Preferably, a flannelette cover is further installed above the cover plate.

[0013] Preferably, both the cover plate and the flannelette cover are arc-shaped and concentric with the spherical shell.

[0014] Preferably, the arc direction of the air outlet channel is opposite to that of the air guiding channel.

[0015] Preferably, the top of the microphone does not protrude from the concave hole.

[0016] Compared with the prior art, the present invention provides a sound pickup device for reducing wind noise, having the following beneficial effects:

[0017] 1. For this sound pickup device, through the air guiding channel formed by the combination of the arc-shaped spherical shell and the arc-shaped plate, the air flow and sound enter the air guiding channel through the through opening. Affected by the Coanda effect, the air flow will adhere to the inner wall of the arc-shaped plate and move. Most of the air flow will not flow towards the microphone. Since sound belongs to waves, it is not restricted. The microphone installed on the spherical shell can still normally receive sound. By filtering the wind noise in a way of replacing blockage with dredging, the stability of the audio quality received by the microphone is guaranteed, and the wind noise reduction effect is good.

[0018] 2. For this sound pickup device, multiple air guiding channels are formed by multiple arc-shaped plates. Each air guiding channel has a limited size and is independent of each other. This not only avoids mutual interference, but also makes the air flow direction more stable in the limited space and is not easy to generate turbulent flow inside, thus guaranteeing the wind noise reduction effect.

[0019] 3. For this sound pickup device, multiple air guiding channels bring multiple microphones, and there will be slight differences in the sounds collected by the multiple microphones in their respective air guiding channels. This is beneficial to the combined use of the multi-microphone wind noise suppression algorithm technology, and further improves the influence of wind noise on the collected audio quality.

[0020] 4. For this sound pickup device, the air flow is concentratedly led out through the air outlet channel provided by the guiding plate. The discharge of the air flow is more stable, and the discharge noise is also smaller, thereby reducing the influence of the air flow noise on the collected sound.

[0021] 5. For this sound pickup device, the structure is simple, there are few internal and external dead corners, and it is more convenient to clean and maintain, thus facilitating the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the appearance of the present invention Figure 1 ;

[0023] Figure 2 is the appearance of the present invention Figure 2 ;

[0024] Figure 3 Cross-sectional view of the present invention;

[0025] Figure 4 Stereogram of the base frame in the present invention;

[0026] Figure 5 Enlarged view of the outer jacket plate of the present invention;

[0027] Figure 6 Stereo of the outer jacket plate of the present invention Figure 1 ;

[0028] Figure 7 Stereo of the outer jacket plate of the present invention Figure 2 ;

[0029] Figure 8 Exploded view of the top cover in the present invention.

[0030] In the figure: 1, base frame; 11, connecting sleeve; 12, spherical shell; 13, concave hole; 2, outer jacket plate; 21, arc plate; 22, side plate; 23, guiding plate; 24, air outlet channel; 25, air guiding channel; 26, through hole; 3, top cover; 31, cover plate; 32, flannelette cover; 33, through hole; 4, microphone; 41, data line. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0033] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] Please refer to Figure 1-8 , a sound pickup device for reducing wind noise, comprising a base frame 1, an outer jacket plate 2, a top cover 3 and a microphone 4;

[0035] The base frame 1 is the basic support structure of the entire sound pickup device. The base frame 1 includes a connecting sleeve 11 and a spherical shell 12. Both the connecting sleeve 11 and the spherical shell 12 are hollow. The top of the connecting sleeve 11 is integrally formed and fixed to the bottom of the spherical shell 12 and is in communication. Twelve concave holes 13 are equally spaced along the outer wall circumference of the spherical shell 12 in the horizontal direction in the middle. The microphone 4 is installed in the concave hole 13. The data line 41 of the microphone 4 passes through the connecting sleeve 11, and the top of the microphone 4 does not protrude from the concave hole 13;

[0036] The outer jacket plate 2 wraps the base frame 1 to form the external structural features. The outer jacket plate 2 includes an arc plate 21, side plates 22 and a guiding plate 23. There are two side plates 22, which are integrally formed and fixed to the left and right sides of the arc plate 21 respectively. The guiding plate 23 is integrally formed and fixed to the bottom end of the arc plate 21 and the corresponding side plates 22. An air outlet channel 24 is provided in the guiding plate 23;

[0037] The radian of the arc plate 21 is the same as the outer wall radian of the spherical shell 12, that is, they are concentric. The side plates 22 are adhesively installed on the spherical shell 12 between adjacent concave holes 13 to form a fixation. An arc-shaped air guiding channel 25 is formed between the side plates 22, the arc plate 21 and the outer wall of the spherical shell 12. The arc direction of the air outlet channel 24 is opposite to that of the air guiding channel 25, that is, the air guiding channel 25 is an arc concentric with the spherical shell 12, and the air outlet channel 24 is an arc facing away from the spherical shell 12. The air guiding channel 25 is facing the microphone 4. Therefore, there are also twelve arc plates 21. The side walls of the twelve arc plates 21 are connected to form a sphere concentric with the spherical shell 12. A through hole 26 is formed at the top of the twelve arc plates 21. The through hole 26 is communicated with the air guiding channel 25 of each arc plate 21;

[0038] The top cover 3 provides further reduction of wind noise. The method of using the currently commonly used hole type and fur type to reduce the air flow rate and break up the air flow to reduce turbulence is adopted. The top cover 3 includes a cover plate 31 and a flannelette cover 32. Both the cover plate 31 and the flannelette cover 32 are arc-shaped and concentric with the spherical shell 12. Through holes 33 are evenly opened on the cover plate 31. Both the cover plate 31 and the flannelette cover 32 are fixed to the arc plate 21 at the position of the through hole 26 by screws to form a fixation. The flannelette cover 32 is made of artificial fur, and the fiber length is not less than 3 cm.

[0039] Working principle and usage process of the present invention: Before use, connect the data cable 41 to obtain the audio data collected by the microphone 4. Sound and air flow enter through the through port 26 and are divided by the side plate 22 and enter different air guiding channels 24 respectively. Due to the arc-shaped inner wall of the air guiding channel 24, the Coanda effect is generated when the air flow circulates inside, that is, the fluid (water flow or air flow) changes from deviating from the original flow direction to flowing along the surface of the protruding object. Most of the air flow will adhere to the inner wall of the arc-shaped plate 21 and flow. Sound belongs to a wave and is not affected by the Coanda effect. The sound is collected by the microphone 4 in the air guiding channel 24, and the collected data is transmitted through the data cable 41. Then the air flow is blown out through the air outlet channel 25 provided by the guiding plate 23, achieving the effect of reducing wind noise;

[0040] At the same time, the top cover 3 can also be installed as needed. The porous setting of the cover plate 31 and the flannel cover 32 both reduce the flow rate of the air flow when it enters, and disperse the air flow to reduce the generation of turbulence, which is equivalent to the function of an acoustic low-pass filter and further reduces the influence of wind noise.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sound pickup device for reducing wind noise, comprising a microphone (4), characterized in that: The microphone (4) is installed on the spherical shell (12). A plurality of arc-shaped plates (21) are evenly installed on the spherical shell (12). Side plates (22) fixed to the surface of the spherical shell (12) are installed on the sides of the arc-shaped plates (21). An arc-shaped air guiding channel (25) is formed between the arc-shaped plates (21), the spherical shell (12), and the side plates (22). A guiding plate (23) is installed at the bottom of the arc-shaped plate (21). An air outlet channel (24) is provided in the guiding plate (23). An opening (26) communicating with the air guiding channel (25) is reserved between the tops of the plurality of arc-shaped plates (21). A concave hole (13) is provided on the outer periphery of the spherical shell (12) corresponding to the position of the air guiding channel (25). The microphone (4) is installed in the concave hole (13).

2. The noise reduction microphone device according to claim 1, wherein: The arc-shaped plate (21) and the spherical shell (12) are concentric.

3. The sound pickup device for reducing wind noise according to claim 2, wherein: A connecting sleeve (11) with an internal connection is installed at the bottom of the spherical shell (12). The data line (41) of the microphone (4) passes out through the connecting sleeve (11).

4. The noise reduction microphone device according to claim 1, wherein: A top cover (3) is installed at the position of the opening (26).

5. The noise reduction microphone device according to claim 4, wherein: The top cover (3) includes a cover plate (31). Through holes (33) are evenly provided on the cover plate (31).

6. The noise reduction microphone device according to claim 5, wherein: A flannelette cover (32) is further installed above the cover plate (31).

7. The sound pickup device for reducing wind noise according to claim 6, characterized in that: Both the cover plate (31) and the flannelette cover (32) are arc-shaped and concentric with the spherical shell (12).

8. The noise reduction microphone device according to claim 1, wherein: The arc direction of the air outlet channel (24) is opposite to that of the air guiding channel (25).

9. The noise reduction microphone device according to claim 1, wherein: The top of the microphone (4) does not protrude from the concave hole (13).

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