Design of adjustable low-frequency sound absorbers through hybrid digital-analog shunt loudspeakers

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2024-10-09 DOI:10.1016/j.apacoust.2024.110331

Yubing Xu, Chaonan Cong

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引用次数: 0

Abstract

Low frequency noise is the primary frequency range that affects individuals’ physical and emotional well-being. The impact of conventional low-frequency sound absorption technologies is restricted by spatial constraints. The shunt loudspeaker is an emerging technology for controlling low-frequency noise, where the acoustic impedance can be modified by a shunt circuit. However, the imprecision and instability caused by the nonlinear impact of loudspeakers and the parasitic resistance of electronic components in analog circuits is challenging. To overcome the problem, this research proposes an adjustable low-frequency sound absorber based on a hybrid digital-analog shunt loudspeaker. The equivalent circuit model is initially formulated, and the design of the adjustable synthetic impedance is then developed. Simulations and experiments are conducted to validate the theoretical model. The proposed absorber demonstrates excellent capabilities in absorbing low-frequency sound with greater precision, stability, independent of the cavity depth and ease of adjustment, enabling a wide range of practical applications.

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通过数字模拟混合分流扬声器设计可调节低频吸音器

低频噪音是影响个人身心健康的主要频率范围。传统低频吸音技术的影响受到空间限制。分流扬声器是一种新兴的低频噪声控制技术，它可以通过分流电路改变声阻抗。然而，扬声器的非线性影响和模拟电路中电子元件的寄生电阻所造成的不精确和不稳定是一项挑战。为了克服这一问题，本研究提出了一种基于数字模拟混合并联扬声器的可调式低频吸声器。首先建立了等效电路模型，然后开发了可调合成阻抗的设计。仿真和实验验证了理论模型。所提出的吸收器在吸收低频声音方面表现出卓越的能力，具有更高的精度和稳定性，不受腔体深度的影响，并且易于调节，因此可以广泛地实际应用。

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.