Sound recording system

Details Sound recording system Sound recording system

1978-03-02

1979-02-27

Kamm, William E.

Surgery

Truss

Perineal

A61M 2100

Patent

active

041413440

ABSTRACT:
In recording an audio program, such as music or voice, on a magnetic tape recorder an A.C. signal generator operating at a frequency below about 14 Hz. provides an A.C. baseline for the audio program signal. This 14 Hz. or lower A.C. signal is sensed by the listener's ear to create an Alpha or Theta state in his brain when the tape is played back.

REFERENCES:
patent: 3400333 (1968-09-01), Inose
patent: 3576185 (1971-04-01), Schulz et al.
patent: 3712292 (1973-01-01), Zentmeyer, Jr.

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