FM theta-inducing audible sound, and method, device and recorded medium to generate the same
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United States of America Patent
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Sep 21, 1999
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N/A
app pub date -
Sep 14, 1994
filing date -
Sep 16, 1993
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Expired
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Abstract
An audible sound of modulated wave where a very low-frequency wave of about 20 hertz or lower is superposed on an audio low-frequency wave effectively stimulates Fm theta in human brain waves to improve attention and concentration during mental tasks when auditorily administered. The audible sound is also effective in stimulation of human alpha wave when the very low-frequency wave lies within the range of about 2-10 hertz. Such audible sound is artificially obtainable by generating an electric signal which contains such a modulated wave, and transducing it into audible sound wave.
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