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Apparatus for inducing frequency reduction in brain wave

Frequency reduction in human brain wave is inducible by allowing human brain to perceive 4-16 hertz beat sound. Such beat sound can be easily produced with an apparatus, comprising at least one sound source generating a set of low-frequency signals different each other in frequency by 4-16 hertz. Electroencephalographic study revealed that the beat sound is effective to reduce beta-rhythm into alpha-rhythm, as well as to retain alpha-rhythm.

Patent number: 4834701
Filing date: Jul 24, 1985
Issue date: May 30, 1989
Inventor: Kazumi Masaki
Assignee: Ken Hayashibara
Apparatus for inducing frequency reduction in... - Google Patents

brain, mind