Method of recording and reproducing subliminal signals that are

Details Method of recording and reproducing subliminal signals that are Method of recording and reproducing subliminal signals that are

1991-03-25

1993-07-06

Apley, Richard J.

Education and demonstration

Audio recording

434236, 600 28, 381 731, G09B 504, G09B 1900, A61M 2100, H04R 302

Patent

active

052248640

ABSTRACT:
A subliminal recording includes both subliminal message and mask signals applied to both tracks of a two track recording medium. The subliminal message signals are identical in content, and are recorded in an out-of-phase relationship. The mask signals are recorded in phase. The resulting recording may be utilized in the conventional manner for subliminal recordings. By combining the composite signals in an inverted relationship, the mask signals cancel while the subliminal message signals are additive, thus allowing the presence of the subliminal message signal to be confirmed on the recording.

REFERENCES:
patent: 4315502 (1982-02-01), Gorges
patent: 4395600 (1983-07-01), Lundy et al.
patent: 4658306 (1987-04-01), Daigaku et al.
patent: 4777529 (1988-10-01), Schultz et al.

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