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Double-face sound-absorbing contacting oral cavity sound shield without cotton

A technology of sound barriers and cavities, applied in noise absorption devices, buildings, etc., can solve the problems of small sound absorption frequency band width and difficulty in meeting the frequency requirements of traffic noise, so as to broaden the sound absorption frequency band, reduce thickness, and reduce traffic noise. noise effect

Inactive Publication Date: 2007-08-15
SHANGHAI JIAOTONG UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The sound barrier has the characteristics of not using natural or artificial cotton fibers, but because the sound barrier only uses a sound-absorbing structure composed of a layer of micro-perforated plates, the width of the sound-absorbing frequency band is relatively small, and it is difficult to meet the frequency requirements of traffic noise control
At the same time, this type of sound barrier has only one side for sound absorption, so it is not suitable for use between tracks and lanes with noise sources on both sides. If two pieces of this type of sound barrier are combined back to back into a double-sided sound-absorbing barrier, the total thickness will be one side. double the sound barrier

Method used

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  • Double-face sound-absorbing contacting oral cavity sound shield without cotton
  • Double-face sound-absorbing contacting oral cavity sound shield without cotton

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Embodiment Construction

[0013] As shown in Figures 1 to 3, the present invention includes: two layers of aluminum fiber sheets 1, two layers of cavities 2, two layers of micro-perforated plates 3, toothed cavities 4, folded partitions 5, and surrounding frames 6. The sound-absorbing surfaces on both sides of the sound barrier are made of aluminum fiber sheets 1, and between the two layers of aluminum fiber sheets 1 and the two layers of micro-perforated plates 3 is a folded partition 5, between the two layers of micro-perforated plates 3 and the folded partition 5 Between them is a tooth-shaped cavity 4, and the surrounding frame 6 fixes the positions of the aluminum fiber sheet 1, the micro-perforated plate 3 and the folding partition 5.

[0014] The sound-absorbing surfaces on both sides of the sound barrier, that is, the two outer surfaces of the sound barrier, are all aluminum fiber sheets. The aluminum fiber sheet 1 and the cavity 2 constitute the first group of sound-absorbing structures, and th...

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Abstract

A non-wool sound screen with engaged cavities and sound absorptive surfaces is composed of two aluminium fibres sheet layers as surficial layers, two empty cavity layers, two microhole plat layers, a toothed cavity, folded partion, and fixing frame. Its advantage is high effect to decrease noise.

Description

technical field [0001] The invention relates to a sound barrier, in particular to a double-sided sound-absorbing cotton-free thin sound barrier, which belongs to the field of noise control in environmental engineering. 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-insul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01F8/00
Inventor 蒋伟康刘秀娟王晨
Owner SHANGHAI JIAOTONG UNIV
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