Dynamic Source Localization via Finite-Element Underwater Acoustic Field Estimation

Acoustic source localization is used in many underwater applications. Acquiring an accurate directional angle for an acoustic source is crucial for source localization. To achieve this purpose, this paper presents a method for directional angle estimation of underwater acoustic sources using a marine vehicle. It is assumed that the vehicle is equipped with two hydrophones and that the acoustic source transmits a specific signal repeatedly. The proposed method provides a probabilistic model for time delay estimation. The probability is recursively updated by prediction and update steps. The prediction step performs a probability transition using the angular displacement of the marine vehicle. The predicted probability is updated using a generalized cross correlation function with a verification process using entropy measurement. The proposed method can provide a reliable and accurate estimation of the directional angles of underwater acoustic sources. Experimental results demonstrate good performance of the proposed probabilistic directional angle estimation method in both an inland water environment and a harbor environment.

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Procedures for Measuring and Modelling Underwater Acoustic Field Parameters

Springer Proceedings in Physics - Acoustics and Vibration of Mechanical Structures—AVMS-2017 ◽

10.1007/978-3-319-69823-6_17 ◽

2017 ◽

pp. 137-145

Author(s):

Delicia Arsene ◽

Claudia Borda ◽

Marinela Marinescu ◽

Larisa Butu ◽

Victor Popovici ◽

...

Keyword(s):

Acoustic Field ◽

Underwater Acoustic

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The analysis of the acoustic field in irregularly shaped rooms by the finite element method

Journal of Sound and Vibration ◽

10.1016/s0022-460x(73)80126-9 ◽

1973 ◽

Vol 29 (1) ◽

pp. 67-IN1 ◽

Cited By ~ 51

Author(s):

T. Shuku ◽

K. Ishihara

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Acoustic Field ◽

The Finite Element Method ◽

Element Method

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Direct regressions for underwater acoustic source localization in fluctuating oceans

Applied Acoustics ◽

10.1016/j.apacoust.2016.10.005 ◽

2017 ◽

Vol 116 ◽

pp. 303-310 ◽

Cited By ~ 28

Author(s):

Riwal Lefort ◽

Gaultier Real ◽

Angélique Drémeau

Keyword(s):

Source Localization ◽

Acoustic Source ◽

Underwater Acoustic ◽

Acoustic Source Localization

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Underwater Acoustic Field in the Presence of Coastlines: A Uniform GTD Approach

Acoustical Imaging ◽

10.1007/978-1-4615-3370-2_146 ◽

1992 ◽

pp. 927-931

Author(s):

Leonidas P. Ivrissimtzis ◽

Dimitris P. Chrissoulidis

Keyword(s):

Acoustic Field ◽

Underwater Acoustic

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Structure-Acoustic Coupling Analysis of Vibration and Underwater Acoustic Radiation of a Ring-Stiffened Conical Shell

Shock and Vibration ◽

10.1155/2021/5027939 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Qingtao Gong ◽

Zhanyang Chen ◽

Hongbin Gui ◽

Dong Yu

Keyword(s):

Acoustic Field ◽

Conical Shell ◽

Sound Pressure ◽

Field Model ◽

Acoustic Radiation ◽

Rear Side ◽

The Finite Element Method ◽

Underwater Acoustic ◽

Acoustic Coupling ◽

Element Method

The underwater acoustic radiation of the submarine power cabin has recently become a hot topic in the industry and also in the academia. In this article, the vibration and underwater acoustic radiation of a ring-stiffened conical shell with bases are investigated numerically by means of the combination of the finite element method and boundary element method. The acoustic radiation field is obtained by the traditional acoustic field model and ISO acoustic field model, respectively. A series of numerical examples are given, and the results are compared. Besides, the sound pressure at different positions with frequency is further studied. It is shown that the sound radiated by the structure mainly propagates to the side directions of the shell and propagates relatively less to the front side and the rear side.

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