Voice activated echo generator

Details Voice activated echo generator Voice activated echo generator

1985-06-04

1986-12-16

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

360 741, 381 63, 434185, 365 45, G10L 500

Patent

active

046303014

ABSTRACT:
A voice activated echo generator employs digital voice recording technology to digitize several spoken words of audio using low-cost encoding techniques. The audio information is stored in dynamic memory and is played back by reconverting the data back from its digitized form to audio, which then drives a loudspeaker. The echo generator has many design parameters which can be varied, such as, duration of recorded speech, voice actuation sensitivity, number of playback repetitions, speech quality, playback speed, playback pitch, and playback volume. For a toy, an input speech threshold initiates a distinct record interval followed by a substantially immediate and automatic playback interval during which the echo is generated without the problem of acoustic feedback.

REFERENCES:
patent: 4318188 (1982-03-01), Hoffman
patent: 4389915 (1983-06-01), Bione
patent: 4413290 (1983-11-01), Furuta

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