Emergency vehicle detection system

Details Emergency vehicle detection system Emergency vehicle detection system

1997-08-22

1999-04-13

Wu, Daniel J.

Communications: electrical

External condition vehicle-mounted indicator or alarm

Transmitter in another vehicle

340904, 340943, 3406933, 367 93, 174 36, 381 56, G08G 100

Patent

active

058942793

ABSTRACT:
An emergency vehicle detection system is provided including a first microphone mounted to a front end of a vehicle for receiving audio signals and a second microphone mounted to a rear end of the vehicle also for receiving audio signals. A pair of wires are provided having a first end connected to an associated one of the microphones. An indicator light is positioned on a dash of the vehicle for illuminating upon the actuation thereof. A high pass filter resides in communication with the wires for abating frequencies of the audio signals that reside below a predetermined amount. Finally, a level detector is connected between the high pass filter and the indicator light. In use, the level detector is adapted to actuate the indicator light upon the detection of an audio signal with a magnitude greater than a predetermined level.

REFERENCES:
patent: 3014199 (1961-12-01), Dill et al.
patent: 3916413 (1975-10-01), Davis
patent: 4158190 (1979-06-01), Stefanov
patent: 4212085 (1980-07-01), Vaillancour et al.
patent: 4939315 (1990-07-01), Palmer
patent: 4952931 (1990-08-01), Serageldin et al.
patent: 4956866 (1990-09-01), Bernstein et al.

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