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A full-frequency sound absorption and noise reduction device

A sound absorption and noise reduction technology, applied in noise absorption devices, buildings, etc., can solve problems such as human health hazards, narrow sound absorption frequency band, poor sound absorption performance, etc., to save costs, increase sound absorption frequency band, improve The effect of sound absorption performance

Active Publication Date: 2016-08-24
JIANGSU XINGUANG ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention aims to solve the problems that the existing sound barriers are harmful to human health, the sound absorption frequency band is narrow, and the sound absorption performance is poor, and then proposes a multi-layer non-fiber sound-absorbing material As a noise reduction device for internal sound-absorbing structures

Method used

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  • A full-frequency sound absorption and noise reduction device
  • A full-frequency sound absorption and noise reduction device
  • A full-frequency sound absorption and noise reduction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 1-4 As shown, a full-frequency sound absorption and noise reduction device includes a panel 1, a sound-absorbing material layer, a back plate 2, a cover plate 3, a bottom plate 4 and two side plates 8, the panel 1, the back plate 2, the cover plate 1. The bottom plate 4 and two side plates 8 form a cavity structure, and the sound-absorbing material layer is arranged inside the cavity structure. The sound-absorbing material layer is foamed rubber 5, foamed ceramics 6 and foamed aluminum 7; the panel 1 is evenly stamped Sound-absorbing hole, back plate 2 pressing edge; cover plate 1 lower surface is provided with 3 card slots 11, bottom plate 4 upper surface is provided with 3 card slots 11 matching with cover plate 1; from panel 1 to back plate 2, The foamed rubber 5, the foamed ceramics 6, and the foamed aluminum 7 are arranged between the cover plate 1 and the bottom plate 4 in turn, and the upper and lower ends are correspondingly arranged in the slots...

Embodiment 2

[0031] It is basically the same as Example 1, except that the sound-absorbing materials installed from panel 1 to back panel 2 are foam ceramics 6, foam aluminum 7, and foam rubber 5; the thickness of foam rubber 5 is 40 mm, and the thickness of foam ceramics The thickness of 6 is 30mm, the thickness of aluminum foam 7 is 5mm; the distance between panel 1 and ceramic foam 6 is 20mm, the distance between ceramic foam 6 and aluminum foam 7 is 10mm, and the distance between aluminum foam 7 and foam rubber The cavity distance formed by 5 is 10 mm, and the cavity distance formed by the foam rubber 5 and the back plate 2 is 30 mm. With this device, the measured sound absorption coefficient is 0.81, the bending load resistance is increased by 30%, the wind pressure resistance performance ratio is increased by 20%, and the service life is nearly doubled.

Embodiment 3

[0033] It is basically the same as Example 1, except that the sound-absorbing materials installed from panel 1 to back panel 2 are aluminum foam 7, foam rubber 5, and ceramic foam 6; the thickness of foam rubber 5 is 60 mm, and the foam The thickness of the ceramic 6 is 50mm, the thickness of the foamed aluminum 7 is 15mm; the distance between the panel 1 and the foamed aluminum 7 is 25mm, the distance between the foamed aluminum 7 and the foamed rubber 5 is 30mm, the foamed ceramic 6 and the foamed The distance between the cavity formed by the aluminum 7 is 30 mm, and the distance between the cavity formed by the foamed aluminum 7 and the back plate 2 is 35 mm. With this device, the measured sound absorption coefficient is 0.86, the noise reduction is increased by 20%, the bending load is increased by 30%, the wind pressure resistance performance is increased by 20%, and the service life is nearly doubled.

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Abstract

The invention discloses a full-screen sound absorption and noise reduction device which comprises a face plate, a sound absorption material layer, a back plate, a cover plate, a bottom plate and two side plates. A cavity structure is formed by the face plate, the back plate, the cover plate, the bottom plate and the two side plates. The sound absorption material layer is arranged in the cavity structure. The full-screen sound absorption and noise reduction device is characterized in that the sound absorption material layer is made of foaming rubber, foaming ceramic and foaming aluminum. Non-fiber sound absorption materials are adopted as inner filler, have no harm to human bodies and are environmentally friendly; the inner sound absorption materials are installed between the cover plate and the bottom plate in an inserted mode, and therefore installation is more convenient, and cost is saved; due to the design of the multi-layer sound absorption structure, the sound absorption performance of the device is improved, and the sound absorption frequency is increased.

Description

technical field [0001] The invention relates to a full-frequency sound absorption and noise reduction device. Background technique [0002] With the development of our country's economy, the construction of railways and roads is also constantly developing, and the resulting traffic noise problem has been paid more and more attention. Building noise reduction devices is one of the most effective and practical technical means to reduce noise pollution. Fiber materials such as glass wool are generally used as sound-absorbing bodies in current noise reduction devices, which bring certain harm to human health, and generally a single sound-absorbing material is used as a filler, and the sound-absorbing frequency band is narrow, and the sound-absorbing effect is not good. good. Contents of the invention [0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention aims to solve the problems that the existing sound barriers are h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01F8/00
CPCE01F8/0005E01F8/007
Inventor 高琍玲康健许晶晶蒋立新王卫东宣君
Owner JIANGSU XINGUANG ENVIRONMENTAL PROTECTION ENG
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