Results 151 to 160 of about 569 (176)
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An ensemble source spectra model for merchant ship-radiated noise
The Journal of the Acoustical Society of America, 2002This paper presents an evaluation of the classical model for determining an ensemble of the broadband source spectra of the sound generated by individual ships and proposes an alternate model to overcome the deficiencies in the classical model. The classical model, proposed by Ross [Mechanics of Underwater Noise (Pergamon, New York, 1976)] postulates ...
Stephen C, Wales, Richard M, Heitmeyer
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Underwater radiated noise of the NOAA ship Oscar Dyson
Noise Control Engineering Journal, 2006The NOAA Ship OSCAR DYSON is the First-in-Class fisheries research vessel designed and built for the National Oceanic and Atmospheric Administration (NOAA) for fish stock assessment. One of its most important contractual requirements was to achieve an underwater noise limit established by the International Council for the Exploration of the Seas (ICES).
Michael Bahtiarian, Raymond Fischer
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On the active control of spectral lines of ship radiated noise
2014 12th International Conference on Signal Processing (ICSP), 2014By properly setting up a secondary sound source on ship's shell, it is theoretically feasible to suppress ship radiated noise in a local region. Since low frequency line spectrum of ship radiated noise contains significant signature information, its active control has always been an important research task.
Yuan Zheng, Chengjun Hu, Hanbo Zhao
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Reduction of noise radiated from ship structures
Applied Acoustics, 1968Abstract The noise power generated by a normal point force excitation applied to various types of ships' hulls are compared with theoretical values for an infinite plate. Tests simulating the response of a hull structure by vibrating one panel of a box floating in a tank of water and measuring the transmitted noise power are described.
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Research on Ship-Radiated Noise Beat Tune Future
2014 Seventh International Symposium on Computational Intelligence and Design, 2014Starting from human subject feeling, ship-radiated noise beat tune future is researched based on psychoacoustics. The relationships between beat tune and the shaft frequency harmonic structure of DEMON are found. Harmonic structures between targets of different types are different, and beat tunes are also different.
Jiaxing Qiu, Jingcheng Zhang
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Similarity Evaluation of Ship Radiated Noise’s Continuous Spectrum
2018 14th IEEE International Conference on Signal Processing (ICSP), 2018Similarity evaluation of ship radiated noise’s continuous spectrum is indispensable for applications such as underwater target identification, ship status monitoring, etc. The evaluation mainly consists of two signal processing steps: feature extraction of continuous spectrum, calculation of feature similarity.
Yuan ZHENG, Zhizhong LI, Bin JIANG
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Numerical assessment of underwater noise radiated by a cruise ship
Ships and Offshore Structures, 2013The present paper deals with a methodology for the prediction of propeller-induced acoustic pressures and associated ship response, having considered propellers as the main acoustic source onboard ships. Semi-empirical and numerical approaches have been coupled for the characterisation of the propeller and the determination of the radiated acoustic ...
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Clustering of Multiple Ships Underwater Radiated Noise
OCEANS 2023 - Limerick, 2023Talmo Alexandri, Roee Diamant
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