Monaural to binaural audio processor

Details Monaural to binaural audio processor Monaural to binaural audio processor

1983-07-21

1985-11-26

Hickey, R. J.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

330 59, 381 94, H04R 500

Patent

active

045557950

ABSTRACT:
An audio processor which converts monaural input to a realistic pleasant sounding binaural output in which optical coupling means, having a nonlinear transfer characteristic, creates an unbalanced output to a pair of audio outputs. The system provides for a high or low level input, which may be selected by a switch, to an emitter follower which drives an optical coupling circuit. The optical coupling circuit is comprised of a light emitting diode and a phototransistor connected in a phase splitting network. The phase splitting network provides an unbalanced output to terminals for connecting to preamplifiers, amplifiers, etc. An alternative embodiment employs two optical coupling circuits in two separate signal processing channels, including two phase splitting networks.

REFERENCES:
patent: 3156769 (1969-11-01), Markowitz
patent: 3560656 (1971-02-01), Gilbert
patent: 3670106 (1972-06-01), Orban
patent: 3911776 (1975-10-01), Beigel
patent: 3980964 (1976-09-01), Grodinsky
patent: 4239939 (1980-12-01), Griffis
patent: 4308424 (1981-12-01), Bice, Jr.
Sansui Corp., Advertisement in Stereo Review, Aug., 1979.

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