Influence of compressed music bit rate on human electroencephalogram

This paper deals with our research analyzing the influence of sound on human brain activity. Described experiment was performed on four subjects. The sound sequence consisted of six 40 s long tracks with different content was prepared as a WAV file and compressed to MP3 format with three different bit rates - 192 kb/s, 128 kb/s and 32 kb/s. Subjects were listening to the original sequence and compressed sequences with a decreasing bit rate. While they were listening to the sequences their electroencephalogram (EEG) was monitored by four channel device. The influence of decreasing bit rate on extracted EEG has been analyzed in time and frequency domain, energies were calculated.