Spatial distributions of acoustic field scattered at the sea bottom-numerical model

• Autorzy: Tęgowski J.
• Konferencja: International Symposium on HYDROACOUSTICS AND ULTRASONICS EAA Symposium (formerly 13th FASE Symposium) Gdańsk-Jurata, 12-16 May 1997
• Języki publikacji: EN

Abstrakty

EN

The results of the numerical simulation of acoustic wave scattering from rough and attenuating sea bottom are presented. Seattering is studied using ray theory with the main geometry of model taken from Novarini and Caruthers. The distribution of rough surface heights together with bottom acoustical parameters determine the scattered acoustical field properties. Different bottom types with various acoustical parameters have been used in numerical calculations in order to examine the influence of phase shift of reflected signal on scattered acoustical field. Simulation technique was made for surfaces with normal distribution of heights and standard deviation of the surface elevation, 0.01 m. Spatial distribution of the scattered field parameters was determined. Results of calculations for frequencies between 5 and 100 kHz and various bottom parameters are compared.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 1997
• Tom: Vol. 1
• Strony: 141--146
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Tęgowski J.

• Institute of Oceanology Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland

Bibliografia

• 1.Brechowskich L.M., 1974, Akustika Okieana - Nauka, Moskov, 94.
• 2.Mackenzie K.V., 1960, Reflection of Sound from Coastal Bottoms, J Acoust. Soc. Am. 51,417.
• 3.Novarini J.C., Caruthers J.W., 1972, - The Degree of Coherence of Acoustic Signals Seattered at Randomly Rough Surfaces, J. Acoust. Soc. Am. 32, 221
• 4.Novarini J. C., Caruthers J.W., 1973, - Numerical Modelling of Acoustic Wave Seattering from Randomly Rough Surfaces: A Facet Model, J. Acoust. Soc. Am. 53,876.
• 5.Svirydov N. L., 1980, Fiziezeskije svofstva korennyeh porod i osadkov dna Baltijskovo moria, Sovietskaja Geologia 3.