High frequency ship radiated noise in shallow water

• Autorzy: Carbó R. , Molero A. C.
• Konferencja: Proceedings of the 2 nd EAA International Symposium on Hydroacoustics 24-27 May 1999, Gdańsk-Jurata POLAND
• Języki publikacji: EN

Abstrakty

EN

The stationary acoustic field in a two pIane parallel medium, sea surface and sea boftom, when a source near to the sea surface radiates, is characterized by the thickness of the medium and the reflectivity of the boundary surfaces. It is known that the maxima and minima of pressure are produced at same given depths depending on the radiated frequency and distance. Considering the ship noise as an acoustical source, the frequency spectrum of the acoustic pressure at certain depth, is nof only the spectrum of the acoustic ship noise but it is also modified by the wave field originated by consecutive reflections at the boundary surfaces. As a consequence, over the free field spectrum of (he ship noise, a series of minima appears. The corresponding frequencies are those for which the receiver is located at the nodes of the stationary wave field.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1999
• Tom: Vol. 2
• Strony: 213--218
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Carbó R.

• Instituto de Acustica, CSIC, Serrano 144, 28006 Madrid, SPAIN

autor

Molero A. C.

• Instituto de Acustica, CSIC, Serrano 144, 28006 Madrid, SPAIN

Bibliografia

• 1. L.M. Breckhovskikh. Waves in Layered Media, New York: Academic Press, 1969, ch. 5, p.325-34.
• 2. R Carbó, J.S. Santiago, AC. Molero. Condicionantes del ruido radiado al agua por un buque oceanografico. Proc. of Acustica 98, Lisbon, pp. 241-244, (1998)
• 3. B. Garnier, E. Beltri, Ph. Marchami, N. Diner, Noise signature engagement of fisheńes research vessel: a European survey, Proc. of the European Conference on Underwater Acoustics, Luxemburg, pp. 210-221, (1992).
• 4. R.J. Urick. Principles of Underwater Sound, New York: Me. Graw Hill, 1975, ch. p.314.