A sound collector noise reduction device

Abstract

The utility model relates to sound collection equipment technical field discloses a sound collector noise reduction device, including collection shell, the bottom inboard slide coupling of collection shell has buffer damping isolation mechanism, the inboard fixed coupling of collection shell has radio noise reduction mechanism, buffer damping isolation mechanism includes shock attenuation slide, the inboard slide of shock attenuation slide board is connected in the bottom of collection shell, the top fixed coupling of shock attenuation slide board has damping buffer assembly, the top fixed coupling of shock attenuation slide board has buffer shock attenuation assembly. In the utility model, through connecting ear, buffer connecting rod drive, and utilize damping liquid and spring energy consumption, guarantee device stability, promote the stability of collection, avoid sound signal distortion and interference, pass through multi -micro -hole sound -absorbing cotton, sound -absorbing felt, sound -absorbing slit board and resonance sound -absorbing thin plate in proper order and carry out noise reduction, and the quality of collection is improved to different frequency noise reduction, reduce interference, satisfy the diversity scene.

Description

Technical Field

[0001] This utility model relates to the field of sound acquisition equipment technology, and in particular to a noise reduction device for a sound acquisition device. Background Technology

[0002] A sound acquisition device is a device that collects and converts sound signals into electrical signals. Its function is to accurately acquire sound information, and it has a wide range of applications in many fields. In the audio recording industry, it assists in music creation and radio program production; in security monitoring, it can help identify abnormal sounds; and in speech recognition systems, it lays the foundation for intelligent voice interaction. With the development of technology, the requirements for sound acquisition accuracy are constantly increasing, making sound acquisition devices increasingly important.

[0003] When collecting sound in noisy environments, a noise-reducing sound acquisition device is needed. It can remove some environmental noise interference and improve the quality of sound acquisition. This device mainly consists of a microphone, a noise-reducing chip, and a signal amplifier. The microphone collects sound, the noise-reducing chip removes noise, and the signal amplifier amplifies the signal. In use, the device is turned on; the sound is collected by the microphone, processed by the noise-reducing chip, and then output by the amplifier, completing the sound acquisition and noise reduction process.

[0004] In existing technologies, sound acquisition devices face numerous problems when operating in complex environments such as industrial sites, construction sites, railway lines, and machine shops, as well as in places with high precision requirements such as acoustic laboratories and audio recording studios. These problems include the easy transmission of external vibrations to the acquisition device, leading to sound signal distortion and interference; severe interference from internal and external structural noise; shortened lifespan due to wear and tear of internal components caused by vibration and impact; and difficulty in effectively isolating minute vibrations, thus compromising acquisition accuracy. To address these issues, a noise reduction device for sound acquisition devices is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a noise reduction device for a sound acquisition device, which aims to improve the problems of signal distortion, low acquisition accuracy and short equipment life caused by vibration and noise in the existing sound acquisition device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sound acquisition noise reduction device includes an acquisition shell, a buffer vibration isolation mechanism is slidably connected to the bottom inner side of the acquisition shell, and a sound collection noise reduction mechanism is fixedly connected to the inner side of the acquisition shell.

[0008] The buffer and vibration isolation mechanism includes a damping sliding plate, the outer side of which is slidably connected to the inner bottom of the acquisition shell, a damping buffer assembly is fixedly connected to the top of the damping sliding plate, and a buffer shock-absorbing assembly is fixedly connected to the top of the damping sliding plate.

[0009] The damping buffer assembly includes a double-headed damper. The bottom of the double-headed damper is fixedly connected to the top of the shock-absorbing sliding plate. Damping push rods are slidably connected to both ends of the double-headed damper. A buffer connecting rod is rotatably connected to the end of the damping push rod away from the double-headed damper. A connecting ear is rotatably connected to the end of the buffer connecting rod away from the damping push rod. The outer side of the connecting ear is fixedly connected to the top of the bottom cavity of the collection shell.

[0010] As a further description of the above technical solution:

[0011] The sound recording and noise reduction mechanism includes a microphone, which is fixedly connected inside the acquisition shell. The acquisition shell is fixedly connected to a multi-microporous sound-absorbing cotton and a sound-absorbing felt.

[0012] As a further description of the above technical solution:

[0013] The inside of the acquisition shell is fixedly connected to a sound-absorbing slit plate, the inside of the acquisition shell is fixedly connected to a resonant sound-absorbing thin plate, and the inside of the acquisition shell is fixedly connected to a sound-focusing cone, with the constricted end of the sound-focusing cone facing the microphone.

[0014] As a further description of the above technical solution:

[0015] The buffer and vibration damping assembly includes a damping tube, the bottom of which is fixedly connected to the top of the damping sliding plate. A damping spring is slidably connected to the inner side of the damping tube, and the top of the damping spring is fixedly connected to the top of the bottom cavity of the acquisition shell. A damping slide rod is sleeved on the inner side of the damping tube, one end of which is fixedly connected to the top of the damping sliding plate, and the other end of which is fixedly connected to the bottom of the damping spring.

[0016] As a further description of the above technical solution:

[0017] A vibration isolation support spring is fixedly connected to the top of the vibration damping sliding plate, and the end of the vibration isolation support spring away from the vibration damping sliding plate is fixedly connected to the top of the bottom cavity of the collection shell.

[0018] As a further description of the above technical solution:

[0019] A limiting guide ring is fixedly connected to the outer side of the shock-absorbing sliding plate, and the outer side of the limiting guide ring is slidably connected to the bottom inner side of the collection shell. A rubber base plate is fixedly connected to the bottom of the shock-absorbing sliding plate.

[0020] As a further description of the above technical solution:

[0021] The outer side of the acquisition shell is provided with a sound inlet and dustproof hole, and a microphone tube is fixedly connected to the outer side of the acquisition shell.

[0022] As a further description of the above technical solution:

[0023] The top of the collection shell has a heat dissipation vent, and the inner side of the collection shell has a spiral heat dissipation channel, with the heat dissipation vent and the spiral heat dissipation channel communicating with each other.

[0024] This utility model has the following beneficial effects:

[0025] 1. In this utility model, when the device is subjected to vibration, the connecting ear transmits power to the buffer link, which in turn drives the damping push rod to slide within the double-headed damper. Simultaneously, the damping slide rod inside the damping tube guides the extension and retraction of the damping spring, and the vibration isolation support spring undergoes elastic deformation. Through the coordinated action of multiple components, utilizing the energy dissipation of the damping fluid, the extension and retraction of the spring, and the transmission between components, the vibration energy is effectively absorbed and dissipated, ensuring the smooth sliding of the damping sliding plate, preventing sound signal distortion and interference caused by vibration, improving the accuracy of sound acquisition, enhancing the stability and durability of the device, and ensuring the stable operation of the sound acquisition device.

[0026] 2. In this utility model, when the sound receiving and noise reduction mechanism is working, external sound enters through the sound inlet dustproof hole and the sound receiving speaker tube. After being focused by the sound focusing cone, it passes through the multi-microporous sound-absorbing cotton, sound-absorbing felt, sound-absorbing slit plate and resonant sound-absorbing thin plate in sequence for noise reduction, and finally reaches the sound receiving microphone. Through the coordinated noise reduction of multiple components, different frequency noises are absorbed and processed, effectively reducing external noise interference, improving the accuracy and purity of sound acquisition, and more realistically restoring the original timbre and details of the sound, improving the sound acquisition quality, and meeting the needs of various scenarios. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of a sound acquisition noise reduction device proposed in this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the rubber base plate of the noise reduction device for a sound collector proposed in this utility model;

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a schematic diagram of the structure of the receiver speaker tube of the sound collector noise reduction device proposed in this utility model;

[0031] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0032] Legend:

[0033] 1. Acquisition shell; 2. Vibration damping sliding plate; 3. Limiting guide ring; 4. Rubber base plate; 5. Vibration damping tube; 6. Vibration damping slide rod; 7. Vibration damping spring; 8. Connecting ear; 9. Buffer connecting rod; 10. Damping push rod; 11. Double-headed damper; 12. Vibration isolation support spring; 13. Heat dissipation vent; 14. Spiral heat dissipation channel; 15. Microphone tube; 16. Sound inlet dustproof hole; 17. Multi-microporous sound-absorbing cotton; 18. Sound-absorbing felt; 19. Sound-absorbing slit plate; 20. Resonant sound-absorbing thin plate; 21. Sound-focusing cone; 22. Microphone. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figures 1 to 3 The present invention provides an embodiment of a sound acquisition noise reduction device, including an acquisition shell 1. The acquisition shell 1 is the outer shell of the sound acquisition noise reduction device, which plays the role of protecting the internal components. A buffer vibration isolation mechanism is slidably connected to the bottom inner side of the acquisition shell 1, and a sound receiving noise reduction mechanism is fixedly connected to the inner side of the acquisition shell 1.

[0036] The damping and vibration isolation mechanism includes a damping sliding plate 2, which is the basic component of the damping and vibration isolation mechanism. Its surface is smooth and it can move flexibly when subjected to vibration. The outer side of the damping sliding plate 2 is slidably connected to the bottom inner side of the acquisition shell 1. The top of the damping sliding plate 2 is fixedly connected to a damping buffer assembly and a damping shock absorption assembly.

[0037] The damping buffer assembly includes a double-headed damper 11, which is the core component of the damping buffer assembly. When subjected to vibration, the piston drives the damping fluid to flow, utilizing the viscous resistance of the fluid to dissipate vibration energy. The bottom of the double-headed damper 11 is fixedly connected to the top of the damping sliding plate 2. Damping push rods 10 are slidably connected inside both ends of the double-headed damper 11. The damping push rods 10 transmit the force generated by vibration between the double-headed damper 11 and the buffer connecting rod 9, slowing down the movement speed and dissipating vibration energy through the damping effect of the damper. To achieve buffering, the end of the damping push rod 10 away from the double-headed damper 11 is rotatably connected to the buffer link 9, which plays the role of force transmission and conversion. It can convert the vertical motion during vibration into the lateral motion of the damping push rod 10, and consume vibration energy under the action of the damping buffer assembly. The end of the buffer link 9 away from the damping push rod 10 is rotatably connected to the connecting ear 8. The connecting ear 8 provides a connection point for the buffer link 9, which plays the role of force transmission and rotational support. The outer side of the connecting ear 8 is fixedly connected to the top of the bottom cavity of the acquisition shell 1.

[0038] The damping and shock-absorbing assembly includes a damping tube 5, which provides installation space and guidance for the damping spring 7 and the damping slide rod 6. The bottom of the damping tube 5 is fixedly connected to the top of the damping sliding plate 2. The damping spring 7 is slidably connected to the inside of the damping tube 5. When subjected to vibration, the damping spring 7 absorbs and releases energy through its own compression and extension, thus slowing down the transmission of vibration. The top of the damping spring 7 is fixedly connected to the top of the bottom cavity of the acquisition shell 1. The damping slide rod 6 is sleeved inside the damping tube 5. The damping slide rod 6 slides inside the damping tube 5, guiding the extension and contraction direction of the damping spring 7, ensuring the stability of the damping and shock-absorbing process, and improving the vibration isolation performance of the device. One end of the damping slide rod 6 is fixedly connected to the top of the damping sliding plate 2, and the other end of the damping slide rod 6 is fixedly connected to the bottom of the damping spring 7.

[0039] A vibration isolation support spring 12 is fixedly connected to the top of the vibration damping sliding plate 2. The vibration isolation support spring 12 normally serves as a support, keeping the vibration damping sliding plate 2 and the acquisition shell 1 at a certain distance. When subjected to vibration, it absorbs vibration energy through elastic deformation, further enhancing the buffering and vibration isolation effect. The end of the vibration isolation support spring 12 away from the vibration damping sliding plate 2 is fixedly connected to the top of the bottom cavity of the acquisition shell 1.

[0040] A limiting guide ring 3 is fixedly connected to the outer side of the shock-absorbing sliding plate 2. When the limiting guide ring 3 slides with the inner side of the bottom of the collection shell 1, it plays a guiding and limiting role, ensuring that the shock-absorbing sliding plate 2 slides smoothly and avoids displacement or jamming. The outer side of the limiting guide ring 3 is slidably connected to the inner side of the bottom of the collection shell 1. A rubber base plate 4 is fixedly connected to the bottom of the shock-absorbing sliding plate 2. The rubber base plate 4 uses the good elasticity of rubber to buffer vibration, and its anti-slip properties prevent the device from sliding on the placement surface, thus improving the stability of the device.

[0041] Reference Figure 1, Figure 4 and Figure 5 The sound collection and noise reduction mechanism includes a microphone 22, which is the core component for sound acquisition. It can accurately capture external sound signals and convert them into electrical signals. It is located in the center of the acquisition shell 1 to ensure effective sound reception. The microphone 22 is fixedly connected inside the acquisition shell 1. The acquisition shell 1 is fixedly connected to a microporous sound-absorbing cotton 17. The microporous sound-absorbing cotton 17 is made of fibrous material and has a large number of tiny pores inside. These pores form a complex channel structure. When sound waves enter, they are continuously reflected and refracted in the pores. Air molecules rub against the pore walls, converting sound energy into heat energy. It is mainly used to absorb low-frequency noise. The acquisition shell 1 is fixedly connected to a sound-absorbing felt 18. The sound-absorbing felt 18 is made of natural or synthetic fibers and is soft in texture. When high-frequency sound waves come into contact with it, the fibers vibrate, and the sound waves are scattered and absorbed between the fibers. Some of the sound energy is converted into the internal energy of the fibers and dissipated, which has a good absorption effect on high-frequency noise.

[0042] The acquisition shell 1 is fixedly connected to a sound-absorbing slit plate 19 with slits. When high-frequency sound waves enter the slits, they cause the air inside the slits to vibrate and resonate, converting sound energy into heat energy. It has a high-efficiency absorption capability for high-frequency noise in a specific frequency range. The acquisition shell 1 is fixedly connected to a resonant sound-absorbing thin plate 20. When high-frequency sound waves are incident, they cause the air column inside the thin plate to resonate. Sound energy is converted into heat energy and consumed during the resonance process. The acquisition shell 1 is fixedly connected to a sound-focusing cone 21. The sound-focusing cone 21 adopts a horn-shaped structure, which can focus the sound entering the acquisition shell 1 and guide the sound to propagate towards the microphone 22, thereby enhancing the sound signal strength, improving the efficiency and accuracy of sound acquisition, and reducing external stray sound interference. The constricted end of the sound-focusing cone 21 faces the microphone 22.

[0043] The outer side of the acquisition shell 1 is provided with a sound inlet and dustproof hole 16. The sound inlet and dustproof hole 16 is one of the channels for the sound to enter the device. It can not only ensure that the sound is transmitted smoothly, but also block the entry of larger dust particles, preventing dust from damaging the internal microphone 22 and other components. A microphone tube 15 is fixedly connected to the outer side of the acquisition shell 1. The microphone tube 15 has a larger opening and faces the outside. It has a sound focusing effect, which can collect more sound and guide it into the acquisition shell 1, enhancing the sound acquisition capability. It is especially suitable for long-distance or weak sound acquisition scenarios.

[0044] The top of the acquisition shell 1 is provided with a heat dissipation vent 13, which is connected to the heat dissipation channel. The channel structure realizes the dual functions of heat dissipation and noise reduction. The inner side of the acquisition shell 1 is provided with a spiral heat dissipation channel 14. The spiral channel makes the sound propagate along the spiral path, which increases the sound propagation distance and the number of reflections. The sound propagates continuously in the spiral structure, and the energy is gradually lost, thereby achieving noise reduction. In addition, the spiral channel can guide the air to flow along the spiral direction, forming a rotating airflow. This rotating airflow can enhance the scouring effect on the surface of the acquisition device and improve the heat dissipation effect. The heat dissipation vent 13 and the spiral heat dissipation channel 14 are connected.

[0045] Working principle: When the noise reduction device of this sound acquisition unit is working, external sound enters the acquisition shell 1 through the sound inlet dustproof hole 16 and the microphone tube 15. The sound inlet dustproof hole 16 ensures sound transmission while blocking large dust particles. The microphone tube 15 collects more sound and guides it into the interior. After the sound enters, it is first focused by the sound-concentrating cone 21 to enhance the sound signal strength and reduce stray sound interference. Then, it passes sequentially through the multi-microporous sound-absorbing cotton 17, sound-absorbing felt 18, sound-absorbing slit plate 19, and resonant sound-absorbing thin plate 20. The multi-microporous sound-absorbing cotton 17 absorbs low-frequency noise, while the sound-absorbing felt 18, sound-absorbing slit plate 19, and resonant sound-absorbing thin plate 20 absorb high-frequency noise, thus reducing the noise of the sound. The noise-reduced sound then reaches the microphone 22, which converts the sound signal into an electrical signal.

[0046] During the operation of the device, if it is subjected to vibration, the connecting lug 8 at the top of the bottom cavity of the acquisition shell 1 transmits the vibration to the buffer rod 9 that is rotatably connected to it. The buffer rod 9 transmits the force generated by the vibration to the damping push rod 10. The damping push rod 10 slides in the double-headed damper 11. The piston in the double-headed damper 11 drives the flow of damping fluid, using the viscous resistance of the liquid to consume the vibration energy. At the same time, in the damping tube 5 at the top of the damping sliding plate 2, the damping slide rod 6 guides the extension and retraction of the damping spring 7. The damping spring 7 absorbs and releases the vibration energy through its own compression and extension. The vibration isolation support spring 12 also absorbs the vibration energy through elastic deformation. The limiting guide ring 3 ensures the smooth sliding of the damping sliding plate 2. The rubber base plate 4 further buffers the vibration and prevents the device from sliding by using its elasticity and anti-slip properties.

[0047] Meanwhile, the heat generated by the device during operation is dissipated through the spiral heat dissipation channel 14 inside the collection shell 1 and the heat dissipation port 13 at the top. While achieving heat dissipation, the spiral heat dissipation channel 14 also plays a role in noise reduction by utilizing the principle of energy loss when sound propagates along the spiral path.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A noise reduction device for a sound acquisition unit, comprising an acquisition shell (1), characterized in that: A buffer vibration isolation mechanism is slidably connected to the bottom inner side of the acquisition shell (1), and a sound receiving and noise reduction mechanism is fixedly connected to the inner side of the acquisition shell (1). The buffer and vibration isolation mechanism includes a damping sliding plate (2), the outer side of which is slidably connected to the bottom inner side of the acquisition shell (1), a damping buffer assembly is fixedly connected to the top of the damping sliding plate (2), and a buffer shock-absorbing assembly is fixedly connected to the top of the damping sliding plate (2). The damping buffer assembly includes a double-headed damper (11), the bottom of which is fixedly connected to the top of the damping sliding plate (2). The two ends of the double-headed damper (11) are slidably connected to damping push rods (10). The end of the damping push rod (10) away from the double-headed damper (11) is rotatably connected to a buffer connecting rod (9). The end of the buffer connecting rod (9) away from the damping push rod (10) is rotatably connected to a connecting ear (8). The outer side of the connecting ear (8) is fixedly connected to the top of the bottom cavity of the collection shell (1).

2. The sound acquisition noise reduction device according to claim 1, characterized in that: The sound-receiving and noise-reducing mechanism includes a microphone (22), which is fixedly connected inside the acquisition shell (1). The acquisition shell (1) is fixedly connected to a multi-microporous sound-absorbing cotton (17) and a sound-absorbing felt (18).

3. The noise reduction device for a sound acquisition device according to claim 2, characterized in that: The inside of the acquisition shell (1) is fixedly connected to a sound-absorbing slit plate (19), the inside of the acquisition shell (1) is fixedly connected to a resonant sound-absorbing thin plate (20), and the inside of the acquisition shell (1) is fixedly connected to a sound-focusing cone (21), with the converging end of the sound-focusing cone (21) facing the microphone (22).

4. The sound acquisition noise reduction device according to claim 1, characterized in that: The buffer shock absorption assembly includes a shock-absorbing tube (5), the bottom of which is fixedly connected to the top of the shock-absorbing sliding plate (2). A shock-absorbing spring (7) is slidably connected to the inner side of the shock-absorbing tube (5). The top of the shock-absorbing spring (7) is fixedly connected to the top of the bottom cavity of the acquisition shell (1). A shock-absorbing slide rod (6) is sleeved on the inner side of the shock-absorbing tube (5). One end of the shock-absorbing slide rod (6) is fixedly connected to the top of the shock-absorbing sliding plate (2), and the other end of the shock-absorbing slide rod (6) is fixedly connected to the bottom of the shock-absorbing spring (7).

5. A sound acquisition noise reduction device according to claim 1, characterized in that: The top of the shock-absorbing sliding plate (2) is fixedly connected to a vibration isolation support spring (12), and the end of the vibration isolation support spring (12) away from the shock-absorbing sliding plate (2) is fixedly connected to the top of the bottom cavity of the collection shell (1).

6. The noise reduction device for a sound acquisition device according to claim 1, characterized in that: The outer side of the shock-absorbing sliding plate (2) is fixedly connected to a limiting guide ring (3), and the outer side of the limiting guide ring (3) is slidably connected to the bottom inner side of the collection shell (1). The bottom of the shock-absorbing sliding plate (2) is fixedly connected to a rubber base plate (4).

7. The sound acquisition noise reduction device according to claim 1, characterized in that: The outer side of the acquisition shell (1) is provided with a sound inlet and dustproof hole (16), and a microphone tube (15) is fixedly connected to the outer side of the acquisition shell (1).

8. The noise reduction device for a sound acquisition unit according to claim 1, characterized in that: The top of the collection shell (1) is provided with a heat dissipation vent (13), and the inner side of the collection shell (1) is provided with a spiral heat dissipation channel (14), and the heat dissipation vent (13) and the spiral heat dissipation channel (14) are connected.

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