Continuing the relative position of the body which uses the small-sized stereo ultrasonic receiving device, the device,

摘要

PROBLEM TO BE SOLVED: To provide a small-sized lightweight ultrasonic receiving device, especially a small-sized lightweight ultrasonic receiving device mountable directly on an animal swimming in the water.;SOLUTION: This device is constituted of: a CPU, a band-pass filter, an analog/digital converter, a circuit comprising a memory, and a drive battery are stored in a waterproof case; two hydrophones are connected to the CPU in the waterproof case; a voice signal received by the two hydrophones is processed by the CPU by a program software stored in a part of the memory; and the amplitude and the time are recorded in the memory.;COPYRIGHT: (C)2007,JPO&INPIT