Movable membrane-shaped metamaterial acoustic barrier and method of installation

By designing a lightweight, flexible membrane metamaterial sound barrier, combined with multi-layered sound insulation layers and a cavity structure, the problems of inconvenient movement and sound leakage of existing sound barriers have been solved, achieving efficient noise control at construction sites.

CN116892313BActive Publication Date: 2026-07-24INNOVATION CENTER OF YANGTZE RIVER DELTA ZHEJIANG UNIVERSITY
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Patent Information

Application Number
CN202310803950.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-03
Publication Date
2026-07-24
Estimated Expiration
2043-07-03

AI Technical Summary

Technical Problem

Existing noise control measures at construction sites suffer from problems such as heavy weight, inconvenience in relocation, cumbersome disassembly and assembly, poor sound insulation performance, and serious sound leakage, especially the sound leakage problem caused by the gaps at the bottom of existing sound barriers.

Method used

The sound barrier is made of lightweight, flexible membrane metamaterial, including microporous membrane, multi-layer sound insulation layer and cavity structure. Combined with magnetic mass block and fixed buckle design, it forms a high-efficiency sound absorption and sound insulation performance. The cavity reduces sound energy, and the sound insulation layer reflects and absorbs sound waves. The lightweight materials and structural design make it easy to assemble and disassemble.

Benefits of technology

While ensuring convenient disassembly and relocation, it improves the sound insulation and sound absorption performance of construction site noise control, reduces sound leakage, and enhances the overall noise reduction effect of the sound barrier.

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Abstract

The application discloses a movable membrane-shaped metamaterial sound barrier, which comprises a thin film noise reduction unit and a structure fixing unit for arranging and fixing the thin film noise reduction unit, wherein the thin film noise reduction unit comprises a microporous membrane, a first cavity, a first sound insulation layer, a second cavity and a second sound insulation layer arranged along the sound wave propagation direction, and the microporous membrane is provided with a plurality of micropores for absorbing sound waves; when sound waves enter the first cavity through the microporous membrane, the micropores and the first cavity are used for preliminary noise reduction to reduce reflected sound generated by the sound waves; the sound energy of the transmitted sound waves is reduced through the first sound insulation layer and the second sound insulation layer; and the sound energy of the transmitted sound waves is further reduced through the second cavity. The application further provides an installation method. The sound barrier provided by the application is convenient to disassemble and assemble and has the effects of sound insulation and sound absorption, so that the noise pollution of construction equipment in a construction site can be effectively reduced.
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