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Microporous foam double-side absorbing sound type ultra-thin barrier

A technology of microcellular foam and sound barrier, applied in the direction of noise absorption device, building, etc., can solve the problems of thick sound absorption structure, difficult to apply installation space limitation, etc., to widen the sound absorption frequency band, long service life, reduce traffic noise, etc. Effect

Inactive Publication Date: 2006-07-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the sound-absorbing structure formed by adding meshing tooth-shaped cavities after the micro-perforated plate is relatively large, usually around 190mm, and reducing the thickness will sacrifice the low-frequency sound-absorbing performance of the sound barrier
This thickness is sometimes difficult to apply to some occasions with strict installation space restrictions, especially the occasions where the equipment limit between the upper and lower railway lines is small

Method used

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  • Microporous foam double-side absorbing sound type ultra-thin barrier
  • Microporous foam double-side absorbing sound type ultra-thin barrier

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Embodiment Construction

[0014] Such as Figure 1-2 As shown, the present invention includes: two layers of micro-perforated plates 1, two layers of cavities 2, two groups of non-fibrous sound-absorbing porous materials 3, trapezoidal cavities 4, folded partitions 5, and surrounding frames 6. The sound-absorbing surfaces on both sides of the sound barrier are two layers of micro-perforated plates 1, two layers of micro-perforated plates 1, two sets of non-fibrous sound-absorbing porous materials 3 are two layers of cavities 2, two sets of non-fibrous sound-absorbing porous materials 3. There is a trapezoidal cavity 4 between the folding partitions 5, and the surrounding frame 6 fixes the positions of the micro-perforated plate 1 and the folding partitions 5. Two groups of non-fibrous sound-absorbing porous materials 3 are fixed on the folding partition 5 .

[0015] The sound-absorbing surfaces on both sides of the sound barrier, that is, the two outer surfaces of the sound barrier, are both micro-per...

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Abstract

The invention relates to a porous foam dual-surface sound adsorption ultra-thin sound baffle, belonging to the noise control technique. It comprises: two layers of porous plates, two layers of chambers, two groups of non-fiber sound adsorption porous material, a trapezium chamber, a folded baffle plate, and the frame. Wherein, two layers of chambers are arranged between the two layers of porous plates and two groups of non-fiber sound adsorption porous material; the trapezium chamber is arranged between two groups of non-fiber sound adsorption porous material and the folded baffle plate; the frame can fix the porous plates and the folded baffle plate; two groups of non-fiber sound adsorption porous material are fixed on the folded baffle plate; each back of said groups of non-fiber sound adsorption porous plates has a group of trapezium chamber; and two groups of trapezium chambers are meshed and filled by non-fiber sound adsorption porous material. the invention can be mounted between the upper and lower rails of railway or city road or between the driveways to reduce the traffic noise.

Description

technical field [0001] The invention relates to a sound barrier in the technical field of noise control, in particular to a microporous foam double-sided sound-absorbing ultra-thin sound barrier. Background technique [0002] The problem of noise control has been paid more and more attention by people. Environmental noise is directly related to people's quality of life, and even has an important impact on people's physical and mental health. Sound barriers are important facilities for noise control in rail transit, elevated roads and expressways. The current sound barriers are usually installed on one or both sides of roads or rail lines, and can be divided into two categories: sound-absorbing and sound-insulating. . Among them, the side of the sound-absorbing sound barrier facing the sound source has a higher sound absorption coefficient, while the side facing away from the sound source is usually not sound-absorbing; the two sides of the sound-insulating sound barrier are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F8/00
Inventor 蒋伟康严莉刘秀娟
Owner SHANGHAI JIAO TONG UNIV
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