On the nonlinear low-frequency sound absorption performance of Helmholtz resonators with spiral neck

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-05-02 DOI:10.1016/j.apacoust.2025.110765

Zhanzhi Li , Qianwen Yang , Yan Lu , Mingmin Chen , Xiaopei Liu , Dong Yang , Min Zhu

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引用次数: 0

Abstract

This paper focuses on improving the sound absorption performance of Helmholtz resonators at low frequencies by optimizing its neck structure with a given limited cavity volume. It is found that the design of incorporating a spiral baffle at the neck can greatly utilize the neck space and effectively improve the low-frequency sound absorption performance. An impedance model based on the effective length and cross-sectional area of the neck is developed and good predictions on the sound absorption performance against the experimental results are achieved. Both the linear and nonlinear resistances are modeled and validated against experimental results. Notably, under higher sound pressure levels (in the nonlinear region), the HR with spiral neck structure could maintain a more robust sound absorption performance compared to the HR with a traditional orifice neck or an extended orifice neck. This includes both a larger peak sound absorption coefficient and a smaller deviation of the resonance frequency at higher sound pressure levels. The theoretical model is finally used to optimize the spiral neck structure parameters and the results are validated by experimental measurements.

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螺旋颈亥姆霍兹谐振器的非线性低频吸声性能

本文主要研究在限定腔体体积的情况下，通过优化颈部结构来提高亥姆霍兹谐振器的低频吸声性能。研究发现，在颈部加装螺旋折流板的设计可以极大地利用颈部空间，有效提高低频吸声性能。建立了基于颈部有效长度和横截面积的阻抗模型，并根据实验结果对吸声性能进行了较好的预测。建立了线性电阻和非线性电阻的模型，并根据实验结果进行了验证。值得注意的是，在较高声压级（非线性区域）下，与传统孔颈结构或扩展孔颈结构相比，螺旋颈结构的吸声性能更强。这包括更大的峰值吸声系数和更高声压级时更小的共振频率偏差。最后利用理论模型对螺旋颈结构参数进行了优化，并通过实验验证了优化结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

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.