Apparatus and method for automatically monitoring broadcast band

Details Apparatus and method for automatically monitoring broadcast band Apparatus and method for automatically monitoring broadcast band

1988-06-29

1990-09-04

Eisenzopf, Reinhard J.

Telecommunications

Audience survey or program distribution use accounting

458 67, 458186, 358 84, 381 58, H04B 1700, H04R 2900

Patent

active

049550705

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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