PROBLEM TO BE SOLVED: To provide a sleep induction promoting apparatus capable of effectively inducing sleep by allowing various users to equally relax, and without boring the users.;SOLUTION: The sleep induction promoting apparatus for promoting the sleep induction of the user 2, includes: a signal oscillation part 7a for generating pink noise; an ultrasonic wave generating part 7b for synthesizing an inaudible component not less than 20 kHz in the pink noise with the frequency modulation component of the inaudible component, generating the ultrasonic wave of a high frequency component by inaudible sound, and irradiating the user with ultrasonic waves; and a control part 11 for controlling the respective parts.;COPYRIGHT: (C)2009,JPO&INPIT
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