On the relationship between the autocorrelation function of continuous brain waves and the subjective preference of the sound field in change of the IACC

Abstract

This study analyzed the range of α waves (8–13 Hz) of continuous brain waves (CBW) and compared them with the scale value of the subjective preference of the sound field in a change of the interaural cross-correlation function (IACC) [Ando, Concert Hall Acoustics (Springer-Verlag, Heidelberg, 1985)]. The source signal was Sinfonietta, Opus 48; third movement, composed by Arnold. The scale value of the subjective preference and the CBWs to a paired stimuli, i.e., reference stimuli (IACC=1.0) and test stimuli (IACC=0.3 or 0.65), which were presented alternatively were compared. It is found that the value of the effective duration (τe) of the autocorrelation function (ACF) of the α waves from only the right hemisphere corresponds well to the subjective preference. It is considered, therefore, that τe is an objective measure reflecting the subjective preference [Chen and Ando (unpublished)].