3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1305-C5-1308
Remote acoustic monitoring of manganese nodules on the ocean bottomA.V. BUNCHUK and A.N. IVAKIN
N.N. Andreev Acoustics Institute, 4 Shvernik Street, 117036 Moscow, Russia
A wide set of experimental and theoretical investigations have been conducted to find out acoustic properties of the deep-sea bottom covered with manganese nodules. The field experiments have been carried out in four regions of the Pacific and Indian oceans at the frequency range 2-20 kHz with the aim to detect acoustically the presence of bottom nodules and to estimate their parameters. The theoretical model of sound scattering and reflection by a set of nodules on the bottom has been developed, in which the explicit form of connection between characteristics of bottom reradiated acoustic signals and nodules parameters have been established. It made possible to explain all the obtained experimental data and to solve some inverse problems. The main results of the investigations are discussed and considered as the basis for acoustic monitoring of nodules deposits.
© EDP Sciences 1994