Signal detector and methodology for monitoring sound signals hav

Details Signal detector and methodology for monitoring sound signals hav Signal detector and methodology for monitoring sound signals hav

2000-02-15

2000-12-19

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

H04B 106

Patent

active

061635049

ABSTRACT:
A signal detector for monitoring sound signals comprises a first sensor operative in response to sound signals to produce a first electrical signal, first processing circuitry operative in response to the first electrical signal to amplify it and produce a first input signal, digitally controlled oscillator circuitry operative to produce a reference signal at a selected reference signal frequency, a mixer operative to receive the first input signal and reference signal to produce a mixed composite signal, conditioning circuitry operative in response to the mixed composite signal to produce a first amplified output signal, and a first output device for producing a first display in response to the first amplified output signal. A methodology is also provided for monitoring sound signals in order to indicate a presence of those signals having frequencies within a selected range.

REFERENCES:
patent: 5432755 (1995-07-01), Komninos
patent: 6058076 (2000-05-01), Komninos

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