Method of high-resolution sea bottom prospecting and tuned array of paraboloidal electroacoustic transducers to carry out such method

Abstract From the Canadian patent

A method of and an apparatus for the high-resolution sea bottom prospecting in which an electroacoustic paraboloidal transducer (P1-P10) is placed into water the electrodes of which are near the focus of the paraboloid and are connected both to a capacitor bank (C1-C10) the capacitance of which may be varied at will and to a supply circuit (G) for the generation of an electroacoustic discharge between said electrodes. As the capacitance varies the delay time between the primary pulse or underwater prospecting pulse and the cavitation pulse is recorded at any discharge and at the same time dominant frequency of the prospecting signal spectrum is determined. Afterwards capacitance values are …