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仿海螺腔结构的吸声性能

Sound absorption performance of a conch-imitating cavity structure.

作者信息

Xie Suchao, Yang Shichen, Yan Hongyu, Li Zhen

机构信息

Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China.

Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Changsha, 410075, China.

出版信息

Sci Prog. 2022 Jan-Mar;105(1):368504221075167. doi: 10.1177/00368504221075167.

DOI:10.1177/00368504221075167
PMID:35102795
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10450301/
Abstract

At present, in order to solve noise pollution, many experts are studying methods to improve the noise reduction performance of sound barriers and acoustic devices. However，the development of sound-absorbing structures under external noise environments with multiple frequencies has not made significant progress.To improve the sound absorption performance (SAP) and sound insulation performance (SIP) of structures, a novel cavity-imitating sound-absorbing structure model was established based on the multi-cavity resonance structure of conches. By performing experiments with an impedance tube and finite element simulation, the internal design of, and experimental results from a conch-imitating cavity structure (CICS) were analysed. In addition, a variety of structural parameters were investigated and the application of the sound absorber was analyzed. The analytical results showed that the CICS exhibits excellent SAP at low and intermediate frequencies. The peak frequency and sound absorption bandwidth can be changed and optimised by adjusting the structural parameters. The results show that the structure can effectively improve the sound absorption and insulation performance of the sound barrier to achieve the purpose of improving the acoustic performance, and proposes a new solution for the realisation of sound absorption and noise reduction in a multi-noise environment.

摘要

目前，为了解决噪声污染问题，许多专家正在研究提高声屏障和声学装置降噪性能的方法。然而，在多频率外部噪声环境下吸声结构的发展尚未取得显著进展。为了提高结构的吸声性能（SAP）和隔音性能（SIP），基于海螺的多腔共振结构建立了一种新型仿腔吸声结构模型。通过阻抗管实验和有限元模拟，分析了仿海螺腔结构（CICS）的内部设计和实验结果。此外，研究了各种结构参数，并分析了吸声器的应用。分析结果表明，CICS在中低频表现出优异的吸声性能。通过调整结构参数可以改变和优化峰值频率和吸声带宽。结果表明，该结构可以有效提高声屏障的吸声和隔音性能，达到改善声学性能的目的，并为在多噪声环境中实现吸声降噪提出了一种新的解决方案。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2cb4/10450301/715376e7665c/10.1177_00368504221075167-fig18.jpg
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