A sound-absorbing and sound-insulating device for suppressing noise of a sound amplifier

Abstract

This invention discloses a sound-absorbing and sound-insulating device for noise suppression in audio amplifier equipment, specifically relating to the field of sound absorption and noise reduction technology. It includes a cabinet with a sound-insulating structure on its inner sidewall. The sound-insulating structure comprises a vibration-damping plate mounted on the cabinet, a damping layer and a sound-absorbing layer sequentially bonded to one side of the vibration-damping plate, and a noise conversion structure located on the inner side of the sound-insulating structure. This noise conversion structure converts noise energy into vibration energy of the sound-absorbing layer. By combining the vibration-damping plate, damping layer, and sound-absorbing layer in the sound-insulating structure, this invention achieves good vibration reduction and sound absorption / insulation. By converting noise energy into vibration energy of the sound-absorbing layer, noise attenuation is accelerated. Furthermore, because the sound-absorbing layer has a strong ability to absorb dust, it also provides some dust prevention. When cleaning is needed, the vibration energy can shake off the dust from the sound-absorbing layer, making cleaning convenient and quick.

Description

Technical Field

[0001] This invention relates to the field of sound absorption and noise reduction technology, and more specifically, to a sound absorption and insulation device for noise suppression in audio amplifier equipment. Background Technology

[0002] A power amplifier, or power amplifier, is the most basic device in an audio system. Its main function is to amplify the weak signal input from the audio source equipment to generate a sufficiently large current to drive the speakers for sound reproduction. It plays a pivotal role in the entire audio system, acting as an "organizer and coordinator," and to a certain extent, determines whether the entire system can provide good sound quality output. Due to considerations of power, impedance, distortion, dynamics, and different usage ranges and control functions, different power amplifiers vary in their internal signal processing, circuit design, and manufacturing processes. They are widely used in high-end multimedia classrooms, training rooms, small conference rooms, or other simple sound reinforcement applications.

[0003] Current audio amplifiers generally only use sound-absorbing and sound-insulating materials such as foam, and the sound insulation effect is not obvious when the sound is loud. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a sound-absorbing and sound-insulating device for noise suppression of audio amplifier equipment, which uses a combination of vibration damping plate, damping layer and sound-absorbing layer to achieve good vibration reduction and sound absorption and sound insulation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sound-absorbing and sound-insulating device for noise suppression of an audio amplifier includes a cabinet, the inner wall of which is provided with a sound-insulating structure. The sound-insulating structure includes a vibration damping plate installed on the cabinet, and a damping layer and a sound-absorbing layer are sequentially bonded to one side of the vibration damping plate.

[0007] Preferably, the damping layer is a viscoelastic damping material.

[0008] Preferably, the sound-absorbing layer is a wave-shaped sound-absorbing sponge.

[0009] Preferably, the sound insulation structure has a noise conversion structure on one side inside the enclosure, which converts noise energy into vibration energy of the sound-absorbing layer.

[0010] Preferably, the noise conversion structure includes a sound collecting cover facing the middle of the enclosure, a diaphragm is installed at one end of the sound collecting cover near the sound insulation structure, and multiple vibrating rods are installed inside the sound-absorbing layer. Vibration energy is transmitted between the diaphragm and the vibrating rods through a vibration transmission wire.

[0011] Preferably, the noise conversion structure further includes a support rod fixedly connected to the enclosure, a sound collector cover installed on the upper end of the support rod, a receiving part on one side of the support rod, a vibration transmission wire passing through the upper end of the receiving part, and a pressure rod threadedly connected to the enclosure above the receiving part. Rotating the pressure rod can cooperate with the receiving part to clamp the vibration transmission wire.

[0012] Preferably, the portion of the vibration transmission wire passing through the upper end of the receiving part is fitted with a vibration damping sleeve.

[0013] Preferably, an axial fan is installed at the top of the enclosure, and an air inlet is provided at the bottom of the enclosure.

[0014] Preferably, the upper and lower walls inside the enclosure are lined with sound-insulating cotton.

[0015] The technical effects and advantages of this invention are as follows:

[0016] 1. By setting up a sound insulation structure, using a combination of vibration damping plates, damping layers, and sound-absorbing layers, it can achieve good vibration reduction and sound absorption and insulation effects.

[0017] 2. By converting noise energy into the vibration energy of the sound-absorbing layer, the noise attenuation can be accelerated. On the other hand, since the sound-absorbing layer has a strong ability to adsorb dust, it can play a certain role in dust prevention. When cleaning is needed, the vibration energy can shake off the dust on the sound-absorbing layer, making cleaning convenient and quick. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Example 2.

[0019] Figure 2 This is a schematic diagram of the overall structure of Example 1.

[0020] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0021] Figure 4 for Figure 1 A partial structural diagram.

[0022] The attached figures are labeled as follows:

[0023] 1. Enclosure; 11. Sound insulation cotton; 2. Sound insulation structure; 21. Vibration damping plate; 22. Damping layer; 23. Sound absorption layer; 3. Noise conversion structure; 31. Sound collector cover; 32. Vibrating diaphragm; 33. Vibrating rod; 34. Vibration transmission wire; 35. Support rod; 351. Receiving part; 36. Pressure rod; 37. Vibration damping sleeve; 4. Axial flow fan; 41. Air inlet. Detailed Implementation

[0024] Example 1

[0025] like Figure 2 and Figure 3 As shown, this embodiment provides a sound-absorbing and sound-insulating device for noise suppression of audio amplifier equipment, including a housing 1. The inner side wall of the housing 1 is provided with a sound insulation structure 2. The sound insulation structure 2 includes a vibration damping plate 21 installed on the housing 1, and a damping layer 22 and a sound-absorbing layer 23 are sequentially bonded to one side of the vibration damping plate 21.

[0026] Furthermore, the damping layer 22 is a viscoelastic damping material.

[0027] Furthermore, the sound-absorbing layer 23 is a wave-shaped sound-absorbing sponge.

[0028] Vibration damping plate 21 can stop or reduce the vibration of the enclosure 1 itself, while also playing a certain role in sound insulation and noise reduction. Wave-shaped sound-absorbing sponge absorbs the energy of incoming sound waves through the principle of refraction, thus acting as an error correction mechanism. Viscoelastic damping material possesses characteristics of both viscous liquids and elastic solids; it is a material that combines energy storage capacity (elastic part) and energy dissipation capacity (viscous part) in different proportions. When subjected to alternating stress, the mechanical energy acting on the elastic component is stored like potential energy and then returned to the outside, exhibiting elasticity. The other part of the energy acting on the viscous component does not return to the outside; due to the internal friction of the material, it is converted into heat energy and dissipated, causing the vibration amplitude to decay rapidly over time, thereby achieving vibration reduction and reducing radiated noise. Therefore, by setting up the sound insulation structure 2 and using a combination of vibration damping plate 21, damping layer 22, and sound-absorbing layer 23, good vibration reduction and sound absorption / insulation effects can be achieved.

[0029] Furthermore, such as Figure 2 As shown, sound insulation cotton 11 is installed on both the upper and lower walls inside the enclosure 1 to improve the sound insulation effect.

[0030] Example 2

[0031] like Figure 1 and Figure 4 As shown, based on Embodiment 1, a noise conversion structure 3 is provided on one side of the sound insulation structure 2 located inside the enclosure 1. The noise conversion structure 3 converts noise energy into vibration energy of the sound-absorbing layer 23. By converting noise energy into vibration energy of the sound-absorbing layer 23, noise attenuation can be accelerated.

[0032] In this embodiment, as shown in the figure Figure 1 and Figure 4As shown, the noise conversion structure 3 includes a sound collecting cover 31 facing the middle of the enclosure 1. A diaphragm 32 is installed at one end of the sound collecting cover 31 near the sound insulation structure 2. Multiple vibrating rods 33 are installed inside the sound-absorbing layer 23. Vibration energy is transmitted between the diaphragm 32 and the vibrating rods 33 through a vibration transmission wire 34. The sound collecting cover 31 collects noise and reflects it to the middle, causing the diaphragm 32 to vibrate. The diaphragm 32 transmits the vibration to the vibrating rods 33 through the vibration transmission wire 34, thereby reducing vibration and attenuating noise. The vibration transmission wire 34 can be made of thin steel wire.

[0033] Furthermore, such as Figure 4 As shown, the noise conversion structure 3 also includes a support rod 35 fixedly connected to the enclosure 1. A sound collector cover 31 is installed on the upper end of the support rod 35. One side of the support rod 35 has a receiving portion 351. The vibration transmission wire 34 passes through the upper end of the receiving portion 351. Above the receiving portion 351, a pressure rod 36 is threadedly connected to the enclosure 1. Rotating the pressure rod 36 allows it to engage with the receiving portion 351, thereby clamping the vibration transmission wire 34. The pressure rod 36 can be rotated to press down on the vibration transmission wire 34. By adjusting the degree of pressure, the vibration intensity of the vibrating rod 33 can be adjusted.

[0034] Furthermore, such as Figure 4 As shown, a damping sleeve 37 is fitted over the portion of the vibration transmission wire 34 that passes through the upper end of the receiving part 351. This serves to dampen vibration and protect the vibration transmission wire 34.

[0035] Furthermore, such as Figure 1 As shown, an axial fan 4 is installed at the top of the housing 1, and an air inlet 41 is provided at the bottom of the housing 1. This serves to dissipate heat and remove dust.

[0036] During use, the noise is collected by the sound collecting cover 31 and reflected to the center, causing the diaphragm 32 to vibrate. The diaphragm 32 transmits the vibration to the vibrating rod 33 through the vibration transmission wire 34, which serves to reduce vibration and attenuate noise. In addition, since the sound-absorbing layer 23 (wave-shaped sound-absorbing sponge) has a strong ability to absorb dust, it can play a certain role in dust prevention. However, over time, it will absorb a large amount of dust, affecting the normal use of internal components. Therefore, it needs to be treated. The vibration of the vibrating rod 33 can cause the sound-absorbing layer 23 to vibrate, thereby shaking off the dust. At this time, the axial fan 4 should be turned to blow air outward to expel the dust.

[0037] During normal use, when dust removal is not required, the pressure rod 36 should be rotated to press against the vibration transmission wire 34. Controlling the pressure controls the vibration amplitude, achieving both noise reduction through vibration and minimizing the vibration amplitude of the sound-absorbing layer 23 to prevent dust from being shaken off. The axial fan 4 can be kept on continuously. When dust removal is needed, the vibration transmission wire 34 should be loosened to intensify the vibration of the vibrating rod 33, thereby shaking off dust from the sound-absorbing layer 23. During normal use, the pressure applied to the vibration transmission wire 34 should be controlled, and loosening the wire should be avoided as much as possible to prevent loosening due to prolonged and intense vibration.

[0038] By converting noise energy into vibration energy of the sound-absorbing layer 23, noise attenuation can be accelerated. On the other hand, since the sound-absorbing layer 23 has a strong ability to adsorb dust, it can play a certain role in dust prevention. When cleaning is required, the vibration energy can shake off the dust on the sound-absorbing layer 23, making cleaning convenient and quick.

Claims

1. A sound-absorbing and sound-insulating device for noise suppression in an audio amplifier, comprising a housing (1), wherein the inner wall of the housing (1) is provided with a sound-insulating structure (2), characterized in that: The sound insulation structure (2) includes a vibration damping plate (21) installed on the enclosure (1), and a damping layer (22) and a sound-absorbing layer (23) are sequentially bonded to one side of the vibration damping plate (21); The sound insulation structure (2) is provided with a noise conversion structure (3) on one side inside the box (1). The noise conversion structure (3) converts noise energy into vibration energy of the sound-absorbing layer (23). The noise conversion structure (3) includes a sound collection cover (31) facing the middle of the box (1). A vibrating diaphragm (32) is installed at one end of the sound collection cover (31) near the sound insulation structure (2). Multiple vibrating rods (33) are installed inside the sound-absorbing layer (23). The vibrating diaphragm (32) and the vibrating rods (33) transmit vibration energy through a vibration transmission wire (34). The noise conversion structure (3) also includes a support rod (35) fixedly connected to the housing (1). The sound collection cover (31) is installed on the upper end of the support rod (35). One side of the support rod (35) has a receiving part (351). The vibration transmission wire (34) passes through the upper end of the receiving part (351). Above the receiving part (351), a pressure rod (36) is threadedly connected to the housing (1). Rotating the pressure rod (36) can cooperate with the receiving part (351) to clamp the vibration transmission wire (34).

2. The sound-absorbing and sound-insulating device for noise suppression of audio amplifier equipment according to claim 1, characterized in that: The damping layer (22) is a viscoelastic damping material.

3. The sound-absorbing and sound-insulating device for noise suppression of audio amplifier equipment according to claim 1, characterized in that: The sound-absorbing layer (23) is a wave-shaped sound-absorbing sponge.

4. The sound-absorbing and sound-insulating device for noise suppression of audio amplifier equipment according to claim 1, characterized in that: The vibration transmission wire (34) is fitted with a vibration damping sleeve (37) on the upper part of the receiving part (351).

5. A sound-absorbing and sound-insulating device for noise suppression of an audio amplifier according to any one of claims 1-4, characterized in that: An axial fan (4) is installed at the upper end of the housing (1), and an air inlet (41) is provided at the bottom of the housing (1).

6. The sound-absorbing and sound-insulating device for noise suppression of audio amplifier equipment according to claim 1, characterized in that: The upper and lower walls inside the enclosure (1) are provided with sound insulation cotton (11).

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