A hydro-acoustic source model in calculating noise field generated by breaking waves

• Published in: The Journal of the Acoustical Society of America Vol. 118; no. 3_Supplement; p. 2003
• Main Authors: Chen, Xuemei, Means, Steven L., Szymczak, William G., Rogers, Joel C. W.
• Format: Journal Article
• Language: English
• Published: 01-09-2005
• Subjects: Marine
• ISSN: 0001-4966; 1520-8524
• DOI: 10.1121/1.4785681

To develop a complete model for the breaking wave noise, it is necessary to relate the source quantities to the physical parameters of the wave-breaking and noise-generation processes. In this paper, the source structure of an individual breaking wave is simulated using a coupled hydro-acoustic model, which incorporates the physical processes underlying the mechanisms of the generation of the noise. The physical processes of wave formation and breaking are modeled using a generalized hydrodynamics formulation, providing the hydrodynamic parameters, such as pressure variations and air cavity shapes, etc., for the acoustic calculation. In the acoustic simulation, an algorithm has been developed in handling wave propagation in irregular regions, such as the bubbly liquid generated by wave-breaking. For the noise field modeling, the locations and occurrence times for the individual breaking waves are specified as stochastic quantities using Poisson simulations and the total noise field is calculated as the superposition of the noise contributed by those breaking waves. [Work supported by ONR.]