ELECTROMAGNETIC-EXCITATION OF INFRASOUND IN A CONDUCTING MEDIUM

A comparative analysis is made of the mechanisms of interaction betwee n the electromagnetic fields of a global resonator and hydrodynamic an d acoustic disturbances in a conducting medium. A universal boundary c ondition at the interface between air and the conducting medium, which takes into account the motion of the electrolyte, is obtained in an e xplicit analytical form to calculate the long-wavelength electromagnet ic fields. The intensity of the electromagnetic field excited by a ver tical hydroacoustic wave is estimated together with the efficiency of excitation of infrasonic oscillations of a conducting medium in the fi eld of a global resonator. (C) 1998 American Institute of Physics. [S1 063-7842(98)01501-3].