The experiment employed 8 healthy subjects. HRVs of the subjects when they listen to the 1/f fluctuation music, bubbling of a stream, "Shirakami-Sanchi", and when they do not, are recorded separately. Furthermore, in order to investigate the psychological state change, the subjects are required to answer VAS questionnaire for both cases (listening to the 1/f music or "Shirakami-Sanchi", and not). When the subjects listen to the 1/f fluctuation music, their LF/HF values are decreased. On the other hand, when the subjects listen to "Shirakami-Sanchi", their LF/HF values are increased. And the experiment result shows that there exists relationship between VAS data ("Like or Dislike") and HRV data. Therefore, the proposed method is very useful.
