A sound insulation board

Abstract

This utility model provides a sound insulation board. This design uses sound-absorbing cotton and sound-insulating cotton for noise reduction and sound insulation. It adopts dual low-frequency absorption, a compact integrated four-layer functional composite structure, and magnetic sealing to eliminate installation pain points, achieving a leapfrog improvement of "better high frequency, breakthrough low frequency, and no edge damage". It includes a sound insulation board body. The top of the sound insulation board body has a connecting groove. The bottom of the sound insulation board body has a connecting block fixedly installed. The sound insulation board body includes a sound-absorbing layer, a sound-insulating layer, an adaptive metasurface layer, a local oscillator substrate layer, a broadband dissipation layer, and a constraint damping layer. The sound-absorbing layer faces the sound source direction, and the constraint damping layer faces inward. The sound-absorbing layer includes a rectangular box. The outer side of the rectangular box has multiple sound-absorbing holes. The inner side of the rectangular box is provided with sound-absorbing cotton for sound absorption. The sound insulation layer is sound-insulating cotton, which is fixedly installed on the back side of the sound-absorbing layer.

Description

Technical Field

[0001] This utility model relates to the field of sound insulation board technology, and in particular to a sound insulation board. Background Technology

[0002] Existing sound insulation panels primarily rely on the mass effect of high-density materials (such as gypsum board and rubber sheets) to block sound wave transmission. Porous sound-absorbing structures: These use porous materials such as rock wool and polyester fibers to dissipate sound energy through friction. Damping sandwich design: Soft viscoelastic materials (such as butyl rubber) are filled between the layers to suppress resonance.

[0003] However, existing sound insulation materials rely on mass effect, and low-frequency sound waves have long wavelengths and strong penetrating power, resulting in weak low-frequency sound insulation performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, the present invention solves the following technical problem: existing sound insulation materials rely on mass effect, and low-frequency sound waves have long wavelengths and strong penetrating power, resulting in weak low-frequency sound insulation performance. Therefore, this invention provides a sound insulation board.

[0005] To achieve the above objectives, this utility model provides:

[0006] A sound insulation panel includes a sound insulation panel body, a connecting groove is provided on the top of the sound insulation panel body, and a connecting block is fixedly installed on the bottom of the sound insulation panel body. The sound insulation panel body includes a sound absorbing layer, a sound insulation layer, an adaptive metasurface layer, a local oscillator substrate layer, a broadband dissipation layer, and a constraint damping layer. The sound absorbing layer faces the sound source direction, and the constraint damping layer faces inward.

[0007] Preferably, the sound-absorbing layer includes a rectangular box, the outer side of which has multiple sound-absorbing holes, and the inner side of which is provided with sound-absorbing cotton for sound absorption.

[0008] Preferably, the sound insulation layer is sound insulation cotton, which is fixedly installed on the back side of the sound absorption layer.

[0009] Preferably, the adaptive metasurface layer is a three-proof plate, and multiple Helmholtz resonant cavities are arranged on the inner side of the adaptive metasurface layer, forming a honeycomb Helmholtz resonant cavity array. The cavity diameter of the Helmholtz resonant cavity is Φ10mm / neck width is 1.5mm.

[0010] Preferably, the back surface of the adaptive metasurface layer has two cavities, both of which are filled with aerogel. The cavities filled with nanoporous aerogel enhance low-frequency heat dissipation.

[0011] Preferably, the local oscillator substrate layer is an epoxy resin matrix material.

[0012] Preferably, a rectangular cavity is formed on the local oscillator substrate layer, and multiple steel balls are encapsulated in silicone within the rectangular cavity. The natural frequency of the oscillator is tuned to the target frequency band by adjusting the diameter of the steel balls and the hardness of the silicone.

[0013] Preferably, the broadband dissipation layer is a polyester fiber felt, and the polyester fiber felt on the broadband dissipation layer is configured with high-density areas and low-density areas. This is used to cover medium and high frequencies.

[0014] Preferably, the constraint damping layer is formed by pressing an aluminum plate and butyl rubber together to suppress overall vibration. The plate-frame contact area is filled with silane-modified polyurethane foam, whose elastic modulus increases gradually from the core to the frame, eliminating sound reflections caused by impedance abrupt changes. The aluminum plate is 0.5 mm thick and the butyl rubber is 1 mm thick.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] 1. Sound absorption is achieved through sound-absorbing cotton, and sound insulation is achieved through sound insulation layers;

[0017] 2. The sound source is oriented towards the adaptive metasurface layer. The honeycomb Helmholtz resonator array formed by multiple Helmholtz resonators converts sound energy into heat energy through air friction. According to the law of conservation of energy, the sound wave energy is consumed. The low-frequency heat dissipation is enhanced by the microporous aerogel filling the cavity, and the heat energy is dissipated.

[0018] 3. Sound waves contact the local oscillator substrate layer. A soft-coated hard core silicone-coated steel ball oscillator is embedded in the local oscillator substrate layer, breaking the limitation of the mass law. Sound waves of a specific frequency excite the oscillator to resonate, and the reverse sound wave interference cancels the transmission, further improving sound insulation.

[0019] 4. A broadband dissipative layer for sound wave contact is formed by covering the mid-to-high frequency sound waves through high-density and low-density areas set by polyester fiber felt, and is formed by pressing aluminum plates and butyl rubber on the constraint damping layer to suppress overall vibration.

[0020] This utility model reduces noise and provides sound insulation by using sound-absorbing cotton and sound-insulating cotton. It adopts dual low-frequency absorption, a compact integrated four-layer functional composite structure, and magnetic sealing to eliminate installation pain points, achieving a leapfrog improvement of "better high frequency, breakthrough in low frequency, and no edge damage". Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of this design;

[0022] Figure 2 This is a schematic diagram of the internal structure of the adaptive metasurface layer in this design;

[0023] Figure 3 This is a schematic cross-sectional view of the adaptive metasurface layer in this design;

[0024] Figure 4 This is a schematic diagram of the internal structure of the local oscillator substrate layer in this design;

[0025] Figure 5 This is a schematic diagram of the broadband dissipation layer in this design;

[0026] Figure 6 This is a schematic diagram of the internal structure of the sound-absorbing layer in this design.

[0027] In the diagram: 1. Sound insulation panel body; 11. Adaptive metasurface layer; 111. Helmholtz resonant cavity; 112. Cavity; 113. Aerogel; 12. Localized oscillator substrate layer; 121. Rectangular cavity; 122. Steel ball; 13. Broadband dissipation layer; 131. High-density area; 132. Low-density area; 14. Constrained damping layer; 15. Sound absorption layer; 151. Sound absorption hole; 152. Sound absorption cotton; 153. Rectangular box; 16. Sound insulation layer; 2. Connecting block; 21. Connecting groove. Detailed Implementation

[0028] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0029] See Figure 1-6 As shown, a sound insulation panel includes a sound insulation panel body 1. The top of the sound insulation panel body 1 is provided with a connecting groove 21, and the bottom of the sound insulation panel body 1 is fixedly installed with a connecting block 2. The sound insulation panel body 1 includes a sound absorbing layer 15, a sound insulation layer 16, an adaptive metasurface layer 11, a local oscillator substrate layer 12, a broadband dissipation layer 13, and a constraint damping layer 14. The sound absorbing layer 15 faces the sound source direction, and the constraint damping layer 14 faces inward.

[0030] Multiple sound insulation panel bodies 1 are connected and installed by connecting block 2 and connecting groove 21.

[0031] In this embodiment, the sound-absorbing layer 15 includes a rectangular box 153. The outer side of the rectangular box 153 is provided with a plurality of sound-absorbing holes 151, and the inner side of the rectangular box 153 is provided with sound-absorbing cotton 152, which absorbs sound.

[0032] In this embodiment, the sound insulation layer 16 is sound insulation cotton, which is fixedly installed on the back side of the sound absorption layer 15.

[0033] In this embodiment, the adaptive metasurface layer 11 is a tri-proof plate, and multiple Helmholtz resonant cavities 111 are disposed on the inner side of the adaptive metasurface layer 11, forming a honeycomb Helmholtz resonant cavity array. The cavity diameter of the Helmholtz resonant cavity 111 is Φ10mm / neck width is 1.5mm. Two cavities 112 are disposed on the back side of the adaptive metasurface layer 11, and both cavities 112 are filled with aerogel 113. The cavity filling with nanoporous aerogel enhances low-frequency heat dissipation.

[0034] In this embodiment, the local oscillator substrate layer 12 is made of epoxy resin matrix material, and a rectangular cavity 121 is formed on the local oscillator substrate layer 12. Multiple steel balls 122 are encapsulated in silicone within the rectangular cavity 121. The natural frequency of the oscillator is tuned to the target frequency band by the diameter of the steel balls 122 and the hardness of the silicone.

[0035] In this embodiment, the broadband dissipation layer 13 is a polyester fiber felt, and the polyester fiber felt on the broadband dissipation layer 13 is configured with a high-density region 131 and a low-density region 132. It is used to cover the mid-to-high frequency range.

[0036] In this embodiment, the constraint damping layer 14 is formed by pressing an aluminum plate and butyl rubber together, and is used to suppress overall vibration. The plate-frame contact area is filled with silane-modified polyurethane foam, whose elastic modulus increases gradually from the core of the plate to the frame, eliminating sound reflection caused by impedance abrupt changes. The aluminum plate is 0.5 mm thick and the butyl rubber is 1 mm thick.

[0037] Working principle: During use, the sound source is directed towards the sound-absorbing cotton 152, where sound is absorbed. Sound insulation is achieved through the sound-insulating layer 16, and then directed towards the adaptive metasurface layer 11. A honeycomb-shaped Helmholtz resonant cavity array formed by multiple Helmholtz resonant cavities 111 converts sound energy into heat energy through air friction. According to the law of conservation of energy, this dissipates sound wave energy. Low-frequency heat dissipation is enhanced by the porous aerogel 113 filling the cavity 112, further dissipating the heat energy. The sound wave then contacts the local oscillator substrate layer 12, where a soft-coated hard-core silicone-coated steel ball oscillator is embedded, breaking the mass law limitation. Sound waves of a specific frequency excite the oscillator to resonate, and reverse sound wave interference cancels transmission, further providing sound insulation. The sound wave then contacts the broadband dissipation layer 13, where high-density areas 131 and low-density areas 132, formed by polyester fiber felt, cover the mid-to-high frequencies of the sound wave. This is achieved by pressing aluminum plates and butyl rubber onto the constraint damping layer 14, which is used to suppress overall vibration.

[0038] This utility model is not limited to the above-described preferred embodiment. Anyone can derive other products in various forms under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that is the same as or similar to this utility model is within its protection scope.

Claims

1. A sound insulation panel, comprising a sound insulation panel body (1), characterized in that: The top of the sound insulation panel body (1) is provided with a connecting groove (21), and the bottom of the sound insulation panel body (1) is fixedly installed with a connecting block (2). The sound insulation panel body (1) includes, in sequence, a sound-absorbing layer (15), a sound-insulating layer (16), an adaptive metasurface layer (11), a local oscillator substrate layer (12), a broadband dissipation layer (13), and a constraint damping layer (14). The sound-absorbing layer (15) faces the sound source direction, and the constraint damping layer (14) faces inward.

2. The sound insulation board as described in claim 1, characterized in that: The sound-absorbing layer (15) includes a rectangular box (153), with multiple sound-absorbing holes (151) on the outer side of the rectangular box (153) and sound-absorbing cotton (152) on the inner side of the rectangular box (153) for sound absorption.

3. The sound insulation board as described in claim 1, characterized in that: The sound insulation layer (16) is sound insulation cotton, which is fixedly installed on the back side of the sound absorption layer (15).

4. The sound insulation board as described in claim 1, characterized in that: The adaptive metasurface layer (11) is a three-proof plate. Multiple Helmholtz resonant cavities (111) are arranged on the inner side of the adaptive metasurface layer (11), and the multiple Helmholtz resonant cavities (111) form a honeycomb Helmholtz resonant cavity array.

5. A sound insulation panel as described in claim 1, characterized in that: The adaptive metasurface layer (11) has two cavities (112) on its back side, and both cavities (112) are filled with aerogel (113).

6. A sound insulation panel as described in claim 1, characterized in that: The local oscillator substrate layer (12) is made of epoxy resin matrix material.

7. A sound insulation panel as described in claim 1, characterized in that: A rectangular cavity (121) is formed on the local oscillator substrate layer (12), and a plurality of steel balls (122) are encapsulated in silicone in the rectangular cavity (121).

8. A sound insulation panel as described in claim 1, characterized in that: The broadband dissipation layer (13) is a polyester fiber felt, and the polyester fiber felt on the broadband dissipation layer (13) is configured as a high-density region (131) and a low-density region (132).

9. A sound insulation panel as described in claim 1, characterized in that: The constraint damping layer (14) is formed by pressing an aluminum plate and butyl rubber together.

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