Work

An Ultra-Thin Composite Metasurface with Hybrid-Damping Modes for Broadband Sound Absorption

Year: 2024

Type: article

Abstract: In this paper, we proposed an ultra-thin composite metasurface for broadband sound absorption, in which a compound Helmholtz structure and porous materials are coupled in a parallel-series arrangement. The Helmholtz structure comprises multiple compound cells with hybrid-damping modes, in which the over-damping and matched-damping impedance are integrated for a lower and broader absorption spectrum. By coupling the porous materials, the metasurface obtains above 85% average absorption over 750–10,000 Hz with a thickness of 31 mm, and the performance below 1600 Hz is significantly enhanced compared to the pure porous materials. This metasurface could possess broad applications in modern equipment considering its extraordinary absorption and compact structure.

Source: Applied Sciences

DOI: 10.3390/app14209290

Authors: Chongrui Liu, Zexiang Xie, Xiaoli Liu

Institution: Xi'an Jiaotong University

Language: English

Topic: Acoustic Wave Phenomena Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation