Shuai Wang , Liuhai He , Chunchuan Liu , Fengming Li
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引用次数: 0
Abstract
This paper proposes a parametric design methodology based on coupling analysis to improve the acoustic performance of conventional Helmholtz resonator arrays with perforated panels, aiming to achieve enhanced low-frequency and broadband sound absorption without structural modifications. Porous material linings are considered within the cavities of the Helmholtz resonators using the double porosity theory. The sound absorption coefficient (SAC) is obtained based on the acoustic impedance in a circular tube and the equivalent circuit method. An acoustic experiment and numerical simulation using the finite element method are carried out for comparison. The complex frequency plane method is applied to elucidate the coupling effects among the absorbers. By coupling the perforated panels with Helmholtz resonator arrays, the zeros of the distinct absorbers move along the positive direction of the imaginary frequency axis, resulting in an acoustic absorber with high SAC and widened sound absorption band. The paper provides a method to design high-performance absorbers under geometric constraints, enabling tailored noise control solutions without structural redesign.
期刊介绍:
Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense.
Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems.
Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.