Research on DEMON spectrum analysis of long horizontal array

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-02-13 DOI:10.1016/j.apacoust.2025.110594

Wei Guo, Yanqun Wu, Bingbing Zhang, Jiahua Zhu, Zemin Zhou

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引用次数: 0

Abstract

Detection of Envelope Modulation on Noise (DEMON) analysis can extract the propeller speed and blade number of underwater targets without prior information, making it widely utilized for passive detection and identification of underwater targets. This study focuses on the envelope distortion of ship-radiated noise in the background of DEMON spectrum analysis based on a long horizontal array, caused by factors such as sound propagation, spatial correlation fluctuations of array signal, and high-frequency grating lobe energy leakage in the beamforming algorithm. The degradation in DEMON spectrum estimation performance resulting from these objective factors is analyzed through theoretical analysis and detailed processing of measured data. Furthermore, a multi-channel fusion DEMON spectrum estimation method is proposed as a supplementary technology for long horizontal array DEMON spectrum analysis with fluctuating acoustic channels. This paper offers a comprehensive and in-depth analysis and summary of current technical challenges and data processing experience related to the application of the DEMON spectrum analysis algorithm to a long horizontal array, providing valuable reference for future research.

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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.