Electrically-operated backup alarm
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United States of America Patent
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Jul 29, 1986
Grant Date -
N/A
app pub date -
Nov 8, 1982
filing date -
Nov 8, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved electrically-operated backup alarm for use on mobile construction and industrial machinery, including selectable lower and higher loudness levels, automatically adjustable loudness level with respect to varying ambient noise level in which the alarm is operating, high and low frequency compensation to substantially eliminate high and low frequency signal components of the sensed ambient noise, and compensation for responding to transient signal components of the sensed ambient noise.
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