Accident sound detection circuit
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United States of America Patent
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-
Jul 11, 2000
Issued Date -
N/A
app pub date -
Jun 9, 1999
filing date -
Jun 24, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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