Accident sound detection circuit

Details Accident sound detection circuit Accident sound detection circuit

1998-06-24

1999-11-23

Hopsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specified indicator structure

340436, 340903, 340917, 340933, G08B 300

Patent

active

059908017

ABSTRACT:
An accident sound detection circuit includes an accident sound detection block that detects an accident sound from a sound signal inputted from an environmental sound detection unit and outputs an accident sound detection signal, a power spectrum calculator for obtaining a power spectrum in regard to a sound signal when acquiring the accident sound detection signal, outputted from the accident sound detection block, as a trigger signal, a spectrum pattern calculator for forming a pattern of the power spectrum, and a pattern comparator circuit for comparing the formed spectrum pattern and a set pattern set in a pattern generating circuit beforehand and generating a final accident sound detection signal if the patterns coincide with each other.

REFERENCES:
patent: 4023017 (1977-05-01), Ceseri
patent: 4337642 (1982-07-01), Yoshida
patent: 4806931 (1989-02-01), Nelson
patent: 4864297 (1989-09-01), Shaw et al.
patent: 5717391 (1998-02-01), Rodriguez
patent: 5784007 (1998-07-01), Pepper
JP 04 338 900 A, Patent Abstracts of Japan Section: P, Sect. No. 1520, vol. 17, No. 187, p. 108, Dec. 4, 1993.

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