Title :
Identification of bottom parameters from acoustic reflections
Author :
Fokina, Margarit A S ; Kerzhakov, Boris V.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
Abstract :
The effect of the layer structure of the elastic absorbing bottom on the space-frequency dependences of acoustic fields in shallow and deep seas in the frequency range 20-533 Hz is studied. The comparison of the experimental losses due to sound propagation in the deep-water part of the Atlantic Ocean at three frequencies and the results of numerical calculations has shown that the experimental and calculated losses may agree satisfactory only if the layer bottom structure is taken into account. Significant parameters of layered bottom such as acoustic impedance, attenuation coefficient and sediment thickness was recovered
Keywords :
geophysical techniques; oceanographic techniques; seafloor phenomena; sediments; seismology; sonar; underwater sound; 20 to 533 Hz; acoustic impedance; acoustic wave scattering; acoustics; attenuation coefficient; elastic absorbing bottom; explosion seismology; layer structure; loss; marine sediment; measurement technique; numerical calculation; ocean bottom; sea; seafloor; sediment thickness; sonar; sound propagation; space-frequency dependence; underwater sound; Acoustic propagation; Acoustic reflection; Attenuation; Impedance; Interference; Oceans; Physics; Propagation losses; Sediments; Tensile stress;
Conference_Titel :
OCEANS '95. MTS/IEEE. Challenges of Our Changing Global Environment. Conference Proceedings.
Conference_Location :
San Diego, CA
Print_ISBN :
0-933957-14-9
DOI :
10.1109/OCEANS.1995.526910
