Meter for passively logging the presence and identity of TV viewers
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United States of America Patent
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Dec 2, 1986
Grant Date -
N/A
app pub date -
Nov 12, 1985
filing date -
Nov 12, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A meter for passively logging the presence of TV viewers including circuitry for disabling the audio of a TV set, a transmitter for wirelessly transmitting the audio to a plurality of headphones, a circuit responsive to the headphones presence upon the head of a viewer for transmitting a headphone ID signal to a monitor, a receiver in the monitor for logging the fact that particular headphones are activated, and a time of day clock for logging the period of time particular headphones are activated.
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