Apparatus and method for automatically monitoring broadcast band listening habits
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 4, 1990
Grant Date -
N/A
app pub date -
Jun 29, 1988
filing date -
Jun 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic monitor and system for automatically monitoring broadcast band listening habits and periodically collecting data at a central location. The electronic monitor includes a microphone circuit and a tuner circuit. The tuner circuit is tuned until a match is found between the microphone circuit and the tuner circuit and the event of a match is recorded in the portable monitor. Operation may be performed intermittently to extend battery operation. The portable monitor further has power supply monitoring circuits to prevent incorrect data and loss of data in the event of battery discharge. Digitizing and signal processing circuits are provided to perform the match and loss of match determination.
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