An anti-interference pickup cavity structure

Abstract

This utility model discloses an anti-interference sound pickup cavity structure, relating to the field of noise monitoring technology. It includes a soundproof outer shell and a receiver. A sound-absorbing mechanism is fixedly connected to the inner wall of the soundproof outer shell, and a connecting shell is fixedly connected to the side of the sound-absorbing mechanism. A sound-absorbing cotton layer is fixedly connected to the inner wall of the connecting shell, and a soundproof inner shell is fixedly connected to the inner wall of the sound-absorbing cotton layer. The upper part of the soundproof outer shell is fixedly connected to the receiver. This utility model weakens echo interference within the shell through acoustic reflection and absorption. The synergistic effect of each component constructs a composite anti-interference system of "sealed isolation - vibration buffering - multi-layer sound absorption - internal loss within the cavity," effectively solving the problem of insufficient sound insulation from a single sponge structure in existing technologies. This enables the receiver to accurately capture target noise during electromechanical equipment testing, improving the accuracy of equipment operation status judgment.

Description

Technical Field

[0001] This utility model relates to the field of noise monitoring technology, and in particular to an anti-interference pickup cavity structure. Background Technology

[0002] The anti-interference pickup cavity structure is an acoustic structure that uses the principles of sound wave reflection, absorption, and resonance to suppress environmental noise and enhance the target sound by optimizing the cavity shape, material combination, and acoustic isolation design. Its function is to improve the signal-to-noise ratio of pickup, optimize the response of speech bands, suppress echo reverberation, and resist vibration and electromagnetic interference, so that the equipment can accurately capture the target sound in noisy scenarios such as conference rooms, vehicles, and industries.

[0003] For example, CN210724813U discloses an anti-interference microphone, which includes a microphone and a housing sleeved on the outside of the microphone. One end of the housing is closed and the other end is open. The housing includes a first shell wall on the outside and a second shell wall on the inside. A cavity is formed between the first shell wall and the second shell wall, and a sound insulation medium is provided in the cavity.

[0004] However, in the existing technology, the soundproofing structure of the microphone is often composed of only a single noise sensor and a sponge windproof cover. This simple structure can only rely on the porous characteristics of the sponge to absorb environmental noise to a limited extent, but it is difficult to block the noise generated by non-detection parts of the electromechanical equipment. Due to the lack of multi-level soundproofing design, external noise can be directly transmitted to the sensor through the shell, and it is impossible to attenuate noise of specific frequencies. This results in redundant noise mixed with the target signal during the detection process, which seriously affects the accuracy of equipment operation status detection. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an anti-interference pickup cavity structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an anti-interference sound pickup cavity structure, comprising a soundproof shell and a sound receiver, wherein a sound-absorbing mechanism is fixedly connected to the inner wall of the soundproof shell, a connecting shell is fixedly connected to the side of the sound-absorbing mechanism, a sound-absorbing cotton layer is fixedly connected to the inner wall of the connecting shell, a soundproof inner shell is fixedly connected to the inner wall of the sound-absorbing cotton layer, and the upper part of the soundproof shell is fixedly connected to the sound receiver.

[0007] Preferably, a sound-absorbing base is fixedly connected to the bottom of the soundproof shell, and a sealing base is fixedly connected to the bottom of the sound-absorbing base.

[0008] Preferably, the sound absorption mechanism includes a first sound absorption cover, which is fixedly connected to the inner wall of the sound insulation shell and to the outer wall of the connecting shell.

[0009] Preferably, an elastic component is installed on the inner wall of the first sound-absorbing cover, and a second sound-absorbing cover is fixedly connected to one end of the elastic component.

[0010] Preferably, the elastic component is a spring.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, a sealed base is placed in close contact with the outside to form a stable sealed interface, blocking noise from entering from the bottom. The sound-absorbing base buffers vibrations at the contact point and absorbs sound, reducing the noise transmitted from mechanical vibrations to the receiver. The soundproof shell acts as an outer barrier, using high-density materials such as metal to block external high-frequency noise and vibration. The connecting shell is connected to the soundproof shell, and the sound-absorbing cotton layer on its inner wall absorbs mid-to-low frequency environmental noise through a porous structure. The soundproof inner shell acts as an inner isolation structure, forming a double soundproof cavity with the sound-absorbing cotton layer, further attenuating residual noise. The sound-absorbing mechanism is fixed to the inner wall of the soundproof shell, weakening echo interference within the shell through acoustic reflection and absorption. The various components work together to construct a composite anti-interference system of "sealed isolation - vibration buffering - multi-layer sound absorption - internal loss within the cavity," effectively solving the problem of insufficient sound insulation of a single sponge structure in the prior art. This enables the receiver to accurately capture target noise during electromechanical equipment testing, improving the accuracy of equipment operation status judgment.

[0013] 2. In this invention, a first sound-absorbing cover is fixed between the inner wall of the soundproof outer shell and the outer wall of the connecting shell. Its porous structure can absorb incident sound waves initially, weakening noise energy. A spring, as an elastic component, connects the first and second sound-absorbing covers. When a sound wave acts on the second sound-absorbing cover, the spring buffers the sound wave energy through expansion and contraction, converting some of the sound energy into elastic potential energy and reducing vibration transmission. The second sound-absorbing cover, supported by the spring, forms a floating secondary sound-absorbing layer, further absorbing the residual noise attenuated by the first sound-absorbing cover. At the same time, the spring's buffering effect reduces echo interference caused by sound wave reflection. This structure, through the combination of a "rigid sound-absorbing layer + elastic buffer + floating sound-absorbing layer," constructs a three-stage noise reduction system of "absorption-buffering-reabsorption." Compared with the existing single sponge structure, it can more efficiently attenuate noise of different frequencies, while suppressing sound wave vibration transmission, making the sound pickup environment of the receiver purer and significantly improving the accuracy of equipment status detection. Attached Figure Description

[0014] Figure 1 This utility model provides a three-dimensional structural diagram of an anti-interference pickup cavity structure;

[0015] Figure 2 This utility model provides a cross-sectional front view of an anti-interference pickup cavity structure;

[0016] Figure 3This invention presents a cross-sectional three-dimensional structural diagram of the first sound-absorbing cover in an anti-interference pickup cavity structure.

[0017] Legend: 1. Soundproof outer shell; 2. Sound-absorbing base; 3. Sealed base; 4. Connecting shell; 5. Sound-absorbing cotton layer; 6. Soundproof inner shell; 7. Sound receiver; 8. Sound-absorbing mechanism; 81. No. 1 sound-absorbing cover; 82. Spring; 83. No. 2 sound-absorbing cover. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1: As Figures 1-2 As shown, this utility model provides an anti-interference sound pickup cavity structure, including a soundproof shell 1 and a sound receiver 7. A sound-absorbing mechanism 8 is fixedly connected to the inner wall of the soundproof shell 1. A connecting shell 4 is fixedly connected to the side of the sound-absorbing mechanism 8. A sound-absorbing cotton layer 5 is fixedly connected to the inner wall of the connecting shell 4. A soundproof inner shell 6 is fixedly connected to the inner wall of the sound-absorbing cotton layer 5. The upper part of the soundproof shell 1 is fixedly connected to the sound receiver 7. A sound-absorbing base 2 is fixedly connected to the bottom of the soundproof shell 1. A sealing base 3 is fixedly connected to the bottom of the sound-absorbing base 2.

[0021] The specific settings and functions of this embodiment are described below. The sealing base 3 is placed in close contact with the outside to form a stable sealing interface, blocking noise from entering from the bottom. The sound-absorbing base 2 reduces the noise transmitted to the receiver 7 by buffering vibrations at the contact position and absorbing sound. The soundproof shell 1 acts as an outer barrier, using high-density materials such as metal to block external high-frequency noise and vibration. The connecting shell 4 is connected to the soundproof shell 1, and the sound-absorbing cotton layer 5 on its inner wall absorbs mid-to-low frequency environmental noise through a porous structure. The soundproof inner shell 6 acts as an inner isolation structure, forming a double soundproof cavity with the sound-absorbing cotton layer 5 to further attenuate residual noise. The sound-absorbing mechanism 8 is fixed to the inner wall of the soundproof shell 1, weakening the echo interference in the shell through acoustic reflection and absorption. The various components work together to construct a composite anti-interference system of "sealing and blocking - vibration buffering - multi-layer sound absorption - internal loss in the cavity", effectively solving the problem of insufficient sound insulation of a single sponge structure in the prior art. This enables the receiver 7 to accurately capture target noise in the detection of electromechanical equipment and improve the accuracy of equipment operation status judgment.

[0022] Example 2: Figure 2 and Figure 3 As shown, the sound absorption mechanism 8 includes a first sound absorption cover 81, which is fixedly connected to the inner wall of the sound insulation shell 1 and to the outer wall of the connecting shell 4. An elastic component is installed on the inner wall of the first sound absorption cover 81, and a second sound absorption cover 83 is fixedly connected to one end of the elastic component. The elastic component is a spring 82.

[0023] The overall effect of this embodiment is as follows: the first sound-absorbing cover 81 is fixed between the inner wall of the soundproof outer shell 1 and the outer wall of the connecting shell 4. Its porous structure can absorb the incident sound waves for the first time, weakening the noise energy. The spring 82, as an elastic component, connects the first sound-absorbing cover 81 and the second sound-absorbing cover 83. When the sound wave acts on the second sound-absorbing cover 83, the spring 82 buffers the sound wave energy through expansion and contraction, converting part of the sound energy into elastic potential energy and reducing vibration transmission. The second sound-absorbing cover 83 forms a floating secondary sound-absorbing layer under the support of the spring 82, further absorbing the residual noise after it has been attenuated by the first sound-absorbing cover 81. At the same time, the buffering effect of the spring 82 reduces the echo interference caused by sound wave reflection. This structure, through the combination of "rigid sound-absorbing layer + elastic buffer + floating sound-absorbing layer", constructs a three-level noise reduction system of "absorption-buffering-reabsorption". Compared with the existing single sponge structure, it can more efficiently attenuate noise of different frequencies, while suppressing the transmission of sound wave vibration, making the sound pickup environment of the receiver 7 purer and significantly improving the accuracy of equipment status detection.

[0024] The device is used and works as follows: it is placed in close contact with the outside through the sealing base 3, and the sound-absorbing base 2 buffers and absorbs the vibration at the contact point. The soundproof outer shell 1, connecting shell 4, sound-absorbing cotton layer 5 and soundproof inner shell 6 are used to insulate and absorb external noise.

[0025] Meanwhile, the first sound-absorbing cover 81 in the sound-absorbing mechanism 8 absorbs the sound, and then the second sound-absorbing cover 83 absorbs the sound again. At the same time, the expansion and contraction of the spring 82 buffers the absorbed sound wave energy through the expansion and contraction of the second sound-absorbing cover 83, further reducing noise.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An anti-interference pickup cavity structure, characterized in that: It includes a soundproof shell (1) and a receiver (7). The inner wall of the soundproof shell (1) is fixedly connected to a sound-absorbing mechanism (8). The side of the sound-absorbing mechanism (8) is fixedly connected to a connecting shell (4). The inner wall of the connecting shell (4) is fixedly connected to a sound-absorbing cotton layer (5). The inner wall of the sound-absorbing cotton layer (5) is fixedly connected to a soundproof inner shell (6). The upper part of the soundproof shell (1) is fixedly connected to the receiver (7).

2. The anti-interference pickup cavity structure according to claim 1, characterized in that: The bottom of the soundproof shell (1) is fixedly connected to a sound-absorbing base (2), and the bottom of the sound-absorbing base (2) is fixedly connected to a sealing base (3).

3. The anti-interference pickup cavity structure according to claim 1, characterized in that: The sound absorption mechanism (8) includes a first sound absorption cover (81), which is fixedly connected to the inner wall of the sound insulation shell (1) and fixedly connected to the outer wall of the connecting shell (4).

4. The anti-interference pickup cavity structure according to claim 3, characterized in that: The inner wall of the No. 1 sound-absorbing cover (81) is equipped with an elastic component, and one end of the elastic component is fixedly connected to the No. 2 sound-absorbing cover (83).

5. The anti-interference pickup cavity structure according to claim 4, characterized in that: The elastic component is a spring (82).

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