Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 17, 2007
0Patent Application Number
112019210
Date Filed
August 9, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
The emergency vehicle alert system may be used for detection of selected sound frequency signals emitted by warning devices of vehicles. A sensor may sense a selected sound frequency signal spectrum and may be in communication with multiple operational amplifiers. The operational amplifiers may be biased to detect a warning device sound source within 50 feet and within 1,500 feet of the sensor. The detection of a warning device sound source may be communicated to a warning indicator to activate the warning indicator.
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