Assembly for eliminating noise from acoustic signals during the determination of the position of sound in the ground

摘要

The arrangement has a portable receiver (9) comprising an acoustic sensor (8) and a magnetic field sensor (7) for detecting magnetic impulses of arcs formed at a fault point. Acoustic impulse is supplied to a memory (10) and compared with previously stored acoustic impulse by a processing algorithm in a processing unit (11). Start time points of the acoustic impulses are synchronized by magnetic impulses, where result from the computing unit is supplied to an evaluating unit i.e. audio channel. A movement detector is attached to the acoustic and magnetic field sensors.