This paper deals with a research of an influence of listening to sound sequence on changing of brain activity. Differences of human electroencephalogram (EEG) monitored by a four channel device on silent conditions and while listening to a sound sequence are described. Sound sequence consisted of fourteen tracks separated by five seconds of silence. This experiment was performed on four subjects sitting on a chair with closed eyes inside an audiology room. The average of four channels was used for additional processing. Signal of each subject was edited to fifteen parts representing EEG signals during listening to each track. All parts of EEG signal were filtered to delta, theta, alpha, beta and gamma activities. Energy of all these activities was calculated. For each activity the changeability of EEG during listening to the tracks was analyzed by analysis of variance.
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