Method of recording and reproducing subliminal signals that are 180 degrees out of phase

• US 5,224,864 A
• Filed: 03/25/1991
• Issued: 07/06/1993
• Est. Priority Date: 03/25/1991
• Status: Expired due to Fees

• Current Assignee: Steven Vavagiakis
• Original Assignee: Steven Vavagiakis
• Inventors: Vavagiakis, Steven
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): Leubecker, John P.
• Application Number:
  US07/674,138
• Time in Patent Office: 834 Days
• Field of Search: 434/307, 434/319, 434/236, 434/262, 360/90, 360/22, 360/18, 360/20, 352/131, 358/142, 73/156, 381/73.1, 381/105, 381/124, 381/51, 381/71, 381/74, 381/97, 395/2, 346/1.1, 600/28, 600/27
• US Class Current: 434/319
• CPC Class Codes: G09B 19/00 Teaching not covered by other main groups of this subclass teaching or practice apparatus for gun-aiming or gun-laying F41G3/26
• CPC Class Codes: G09B 5/04 with audible presentation of the material to be studied sound recording or reproducing G11B

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.

Claims

1. A method for the recording and subsequent reproduction of a subliminal message recording, comprising the steps of placing both a subliminal message signal and a mask signal upon first and second tracks of a recording medium for simultaneous playback, said subliminal message signal on each of said tracks being of identical content and in a 180°

out-of-phase relationship, said mask signal on each of said first and second tracks being of identical content and in an in-phase relationship, the amplitudes of said subliminal message and mask signals being chosen such that the subliminal message signal cannot be perceived upon playback, and playing back each of said tracks through a separate channel of a multi-channel playback apparatus.