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Cavity sound-absorbing sheet

A cavity and sound-absorbing technology, which is applied in the field of sound-absorbing materials, can solve problems such as failure to match the acoustic characteristic impedance of sound-absorbing materials, achieve the effect of improving language clarity and ensuring sound absorption

Active Publication Date: 2016-03-23
GOLD MANTIS CONSTR DECORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials absorb incident sound energy by virtue of their own porosity, thin-film effect or resonance effect, and do not match the acoustic characteristic impedance of the sound-absorbing material with the surrounding sound-transmitting medium, so that the sound energy enters the sound-absorbing material without reflection. , and most of the incident sound energy is absorbed

Method used

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  • Cavity sound-absorbing sheet
  • Cavity sound-absorbing sheet
  • Cavity sound-absorbing sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 , figure 2 , image 3 As shown, a cavity sound-absorbing panel includes a film 1, a cavity partition 4, and a back panel 5. It is a honeycomb panel with an inner cavity 3 structure.

[0025] The cavity partition 4 is a grid plate structure, one side of the cavity partition 4 is provided with a film 1, and the other side of the cavity partition 4 is provided with a back plate 5; A plurality of inner cavities 3 are formed between it and the back plate 5 . The cavity separator 4 is a honeycomb grid plate structure with hexagonal lattice units, and the inner cavity 3 is a cavity with a hexagonal cross section.

[0026] A plurality of ultramicropores 2 are opened on the film 1 at positions corresponding to the inner cavity 3 . The ultramicro holes 2 are tiny round holes with a diameter of 0.2-0.8 mm. The combined structure of the ultramicropores 2 distributed on the film 1 and the inner cavity 3 satisfies the Helmholtz resonance principle.

[0027] A ...

Embodiment 2

[0033] The difference between this embodiment and the first embodiment is that the inner cavity 3 is closed, that is, no round hole is provided on the back plate 5 . The depth of the closed inner cavity 3 is controlled at 50-100 mm, forming a sound-absorbing component.

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Abstract

The invention discloses a cavity sound absorbing plate, which comprises a film (1), a cavity clapboard (4) and a back plate (5), wherein the cavity clapboard (4) has a grid plate structure; one side face of the cavity clapboard (4) is provided with a film (1); the other side face of the cavity clapboard (4) is provided with the back plate (5); a plurality of inner cavities (3) are formed between the film (1) and the back plate (5) in the grid plate structure of the cavity clapboard (4); the film (1) is provided with a plurality of ultra-micro-pores (2) corresponding to the positions of the inner cavities (3); the cavity clapboard (4) has a honeycomb grid plate structure of a hexagonal grid unit; and the back plate (5) is provided with circular holes (6) corresponding to the positions of the inner cavities (3). Due to the adoption of the cavity sound absorbing plate, the problems of long reverberation, sound focusing and echo in large-sized spaces such as shopping malls and gymnasiums can be solved effectively, effective sound absorption in building rooms is ensured, and the language definition in the building rooms is improved.

Description

technical field [0001] The invention relates to a sound-absorbing material for modern building decoration, in particular to a cavity sound-absorbing plate. Background technique [0002] At present, in the selection of sound-absorbing materials for decoration at home and abroad, materials with strong sound-absorbing properties and noise-reducing properties are used. These materials absorb incident sound energy by virtue of their own porosity, thin-film effect or resonance effect, and do not match the acoustic characteristic impedance of the sound-absorbing material with the surrounding sound-transmitting medium, so that the sound energy enters the sound-absorbing material without reflection. , and most of the incident sound energy is absorbed. In large spaces, such as shopping malls and gymnasiums, the sound absorption effect is not very obvious, and acoustic problems often occur. Such as gymnasiums, exhibition halls, railway stations, lecture halls, concert halls, etc., th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/86
Inventor 姜亚洲梁勇霖陈卫潭陆屹杜军吴勇卫蒋玮毕林清盖晓军史勤武刘桦黄懿邹忆文唐新海朱永刚包东群王俊
Owner GOLD MANTIS CONSTR DECORATION
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