Abstract
Possibilities of electric field measurements in the audio frequency range using underground (capacitive) electric sensors are considered. Features of parameters of electric sensors and input circuits of the measurement equipment, robust methods, and software tools for processing obtained data are analyzed. Examples of experimental studies by the audiomagnetotelluric sounding (AMTS) method, demonstrating possibilities of implementing ungrounded electric field measurements in a frequency range of 7–300 Hz, are presented.
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