聆聽音樂時腦波及心率變異性之變化

The use of music for relaxing and relieving anxiety has become increasing popular in recent years. A lot of relevant researches have shown that music has both mental and physiological effect. However, few researches make use of physiological signals to verify the influence of music on human. The aim of our study is to measure the variation of electroencephalogram (EEG) and heart rate variability (HRV) during the course of experiments in listening to music and to distinguish the relation between the music、EEG and HRV. Sixteen volunteers of university students were include in this study. Three situations (no music, soft music and rock music) were randomly ordered in the experiment procedure to prevent bias. The indicators of EEG and HRV in these situations were used to assess and compare the impact of music.
In EEG analysis, we found that the situation of no music had the biggest alpha power and listening to rock music had the smallest alpha power. In comparison of gamma band, it was revealed that listening music, no mater what music, would raise the gamma band power. According to relevant research, stimulus to the perception and selective attention caused individual's gamma power to rise. We also found that there were greater alpha powers on the people who like rock music than the people who don't like when listening to rock music.
In the analysis of HRV, we have discovered that the situation of listening soft music had the increased LF/HF (comparing to rock music) or LF(nu) (comparing to no music). It indicated that listening soft music induced stronger sympathetic activities or reduced the vagal activity. Moreover, we found that alpha power of EEG showed a negative correlation to LF/HF and LF(nu) of HRV and a positive correlation to HF、HF(nu) and SDRR of HRV. This result confirmed that these two physiological measures are consistent in assessment of relaxation in listening to music.