| 摘要 |
<p>In a sleepiness level detection apparatus (100), a heart beat detecting unit (110) detects a heart beat signal, a heart beat interval computing unit (120) detects a heart beat interval, and a spectrum computing unit (130) computes spectral density corresponding to fluctuation in the heart beat interval. Further, a peak frequency computing unit (140) computes maximum frequency and maximum spectral density that is spectral density corresponding to the maximum frequency, and a sleepiness level detection unit (170) determines whether a subject is in a wakeful state based on fluctuation trend of the maximum frequency and the maximum spectral density.</p> |
