Sound propagation time measuring apparatus for measuring objects distance, has calculation device calculating sound propagation time and time difference of sound reception signal based on pulsed signal produced by inverse analysis device

摘要

The apparatus (10) has an analog/digital converter (14) converting a sound reception signal reflected by a target object and received by an acoustic unit of a sound reception device, into a digital echo signal. A calculation device (17) calculates sound propagation time and time difference of the reception signal based on a pulsed signal produced by an inverse analysis device (16).