EEG response of different sound waves and frequencies

In this study, same amplitute sounds of sinuzoidal, square and saw tooth wave in frequencies of 100 Hz, 1 kHz and 10 kHz have been generated during 1 second. These sounds have been listened 5 times by a subject. The averaged power spectrums of the EEG which gathered from the subject have been represented in the frequencies of 0–4 Hz, 4–7 Hz ve 8–12 Hz and evaluated.