Moving sound source identifying system

Details Moving sound source identifying system Moving sound source identifying system

1978-04-05

1980-06-17

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

Responsive to intruder energy

367125, H04B 106

Patent

active

042087350

ABSTRACT:
A moving sound source identifying system wherein a correlation function signal between two sound signals derived respectively from two microphones arranged apart from each other on the ground for respectively receiving sounds which are simultaneously emitted by a sound source is used for identifying whether the sound source is moving or stationary and whether it is flying or moving on the ground, by means of discriminating the variation of respective times whereat maximum or minimum levels of the correlation function signal appear, which variation is caused in accordance with the angle of elevation of the sound source. Continuously obtained results of the identification are utilized for classifying sound sources, removing the noise disturbance and automatically pursuing the sound source.

REFERENCES:
patent: 2166991 (1939-07-01), Guanella
patent: 3145341 (1964-08-01), Andrew
patent: 3182283 (1965-05-01), Ellingson et al.
patent: 3750152 (1973-07-01), Waful
patent: 3763465 (1973-10-01), Tatge et al.
patent: 3852706 (1974-12-01), Barney et al.
patent: 3947803 (1976-03-01), Brown

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