双耳差频声刺激下的脑波特征与心理变化

Brainwave features and psychological reactions under the stimulation of binaural auditory beats

首先通过前期主观实验得到人耳对双耳差频声的感知频谱,随后通过两部分实验,分别探索双耳差频声刺激下被试的脑波特征与心理变化,选取人耳感知阈值较大的中频作为载波信号。经过分析脑波特征与心理变化之间的相关性,为通过测量与分析被试的脑波参数,预测其心理尺度提供一定的分析思路。分析结果表明:各脑波分析指标与疲劳、抑郁、精力这三个情绪以及情绪总估价分之间的相关性较为显著,相关系数绝对值均达到0.5以上;Delta/Theta波段功率比重与反应时间、正确率正相关,Beta波段功率比重与反应时间、正确率负相关。

First, human auditory perception spectrum based on binaural beats is obtained by the prior subjective expe- riment. Then, laws of EEG and psychological variation under the stimulation of binaural beats （choosing the mid-frequency of a greater perception threshold as the carrier） are summarized through two-stage experiments. By analyzing the correlation between EEG features and psychological indicators, a certain analysis method for predicting psychological scale is achieved through measuring and analyzing EEG parameters. The analysis results indicate that there are good correlations （〉0.5） between various EEG indexes and fatigue/depression/energy/TMD （Total Mood Disturbance）, and that the proportion of Delta/Theta band power is positively correlated with reaction time and accu- racy rate, while the status of Beta band is just the reverse.