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31 December 2019 The influences and modification on the fidelity of vessel radiated noise power spectrum by main-beam width of measurement array
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Abstract
In the question of the impact of the main-beam width on vessel radiated noise power spectrum characteristics, a typical mathematical model was established, the influence of the main-beam covering vessel and its trajectory on the acquisition of vessel radiation noise power spectrum characteristics is studied. Theoretical and simulation results show that when main-beam cannot cover the vessel and its trajectory, the method of multi-beam synthesis should be apply in order to undistorted acquire the vessel radiation noise power spectrum characteristic. A cargo-ship radiated noise characteristics is acquired based on the method of multi-beam synthesis in this paper, the difference of broadband sound pressure level acquired by beamforming and single hydrophone is less than 1.8dB. The research results can provide a basis and example for the effective acquisition of vessel radiated noise characteristics based on acoustic measurement array.
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Wang Yang, Guijuan Li, and Yansen Liu "The influences and modification on the fidelity of vessel radiated noise power spectrum by main-beam width of measurement array", Proc. SPIE 11384, Eleventh International Conference on Signal Processing Systems, 1138407 (31 December 2019); https://doi.org/10.1117/12.2559663
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