Chuo University

Masayuki Satomi

Hiroyuki Kubotani

Wataru Nakai

Takeshi Toi

A wakefulness-maintaining device capable of maintaining a driver's wakefulness by making the driver aware of changes in sound characteristics. A wakefulness-maintaining device (), which maintains a person's wakefulness, wherein: a switching time control part () analyzes the characteristics of perceived sounds acquired by a microphone provided inside the vehicle, the perceived sounds comprising control sounds played back by the wakefulness-maintaining device () and environmental sounds around the person when no control sounds are being played back; an in-car sound-accumulating part () accumulates the perceived sounds; an acoustic pressure change-setting part () sets the control method to be used on the environmental sounds on the basis of the characteristics of the perceived sounds accumulated by the in-car sound-accumulating part (); and a control sound-generating part () applies the control method, set by the acoustic pressure change-setting part (), on the environmental sounds and generates control sounds.

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Tokyo, Japan

Masayuki Satomi