Audible audio level indicator

Details Audible audio level indicator Audible audio level indicator

1986-04-10

1987-12-08

Tokar, Michael J.

Communications: electrical

Condition responsive indicating system

Specific condition

340566, G08B 300

Patent

active

047120932

ABSTRACT:
A system for monitoring the level of an intelligence-containing audio frequency signal wherein an operator audibly monitors the signal but cannot adequately monitor a visual level indicator. The system utilizes a threshold detector which compares the level of an audio frequency signal to a preselected level and generates a control signal if the audio frequency signal exceeds the threshold. The system further includes a gate which couples a tone to the headphones of the operator in response to generation of the control signal. In an alternative embodiment, if a second threshold is exceeded, the threshold detector generates a second control signal which changes the tone signal frequency.

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patent: 4307385 (1981-12-01), Evans et al.
patent: 4416155 (1983-11-01), Kirby
patent: 4529973 (1985-07-01), Blamberg

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