Method and device for matching the reflector of an acoustic echo

Details Method and device for matching the reflector of an acoustic echo Method and device for matching the reflector of an acoustic echo

1980-12-22

1982-11-09

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

179 1MF, 367104, 367902, 367151, G01S 752, G10K 1128

Patent

active

043588352

ABSTRACT:
The reflector of an acoustic echo ranging system is matched so as to make up for the influence of the temperature at the bottom of the reflector, on the measurement of the back-reflected signal. The acoustic signal receiver being stationary the transmission frequency is controlled by a temperature responsive electronic circuit so that the receiver is always located at the same pressure antinode. Alternatively, the transmission frequency being fixed, the position of the receiver is controlled by a temperature responsive mechanical gear causing the position of the receiver to coincide with the same pressure antinode.

REFERENCES:
patent: 2274262 (1942-02-01), Wolff
patent: 3895188 (1975-07-01), Ingraham

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