A method for controlling dipole characteristic noise sources inside duct based on acoustic shortcut channel

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-01-18 DOI:10.1016/j.apacoust.2025.110542

Zhenfei Zang, Xiaochen Zhao, Shiqi Zhang, Jie Guo

引用次数: 0

Abstract

This study proposes a passive noise control method using coupled loudspeakers to counteract dipole sound sources within ducts. Coupled loudspeakers create an acoustic shortcut channel in the duct, which cancels out the out-of-phase noise radiated upstream and downstream by dipole sources placed in the duct. This paper establishes an acoustic model of the coupling system based on plane wave theory and analyzes its attenuation effect on duct noise. Additionally, the study analyzes the influence of geometric and loudspeaker parameters. To broaden the noise reduction frequency band, the paper investigates the acoustic attenuation characteristics of arrays of coupled loudspeakers combinations. Ultimately, experimental results demonstrate that properly arranged coupled loudspeakers can achieve more than 10 dB noise control effectiveness in the low-frequency range against dipole sources.

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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.