Method of operating a device for monitoring the interior of an a

Details Method of operating a device for monitoring the interior of an a Method of operating a device for monitoring the interior of an a

1996-06-10

1997-10-28

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340514, 340552, 340565, 340567, 367 93, 367 94, B60R 2510

Patent

active

056821344

ABSTRACT:
A method of operating a system for monitoring the interior of a motor vehicle in which a rest signal amplitude is measured for the acoustic receiver or receivers in the absence of sound and is stored in memory while an actual reading is taken of the measured signal again in the absence of sound within the vehicle interior and this letter value is compared to the first and an error register is set if the measured value is outside a stored window.

REFERENCES:
patent: 4743886 (1988-05-01), Steiner et al.

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