On THE ANALYSIS OF AUTOCORRELATION FUNCTION OF Α-Waves ON THE LEFT AND RIGHT CEREBRAL HEMISPHERES IN RELATION TO THE DELAY TIME OF SINGLE SOUND REFLECTION

Subjective Preference of Cellists for the Delay Time of a Single Reflection in a Performance

“…Figure 2 demonstrates an example of the logarithm of the absolute value of the ACF plotted as a function of the delay time. The envelope decay of the initial part of the ACF can be "tted by a straight line in the range from 0 to !5 dB, and the e!ective duration C of the ACF can be easily obtained from the decay rate extrapolated at !10 dB [9]. Examples of e!ective durations of the running ACF for music motif I played by subjects B and E are shown in Figure 3.…”

Analysis of MEG relating to subjective preference of visual motion stimuli

“…When the spatial factor, the listening level of a continuous speech signal was changed, the right hemisphere was activated significantly [9]. And when the temporal factors, the noise-burst tempo, the delay time of the single reflection (∆t1), and the subsequence reverberation time (T sub ), were changed, the left hemisphere was activated significantly [2][3][4]. The result of our experiment in a visual field is considered to be due to changing the temporal factor, the period of visual stimulus.…”

“…4 demonstrates an example of the logarithm of the absolute value of the ACF plotted as a function of the delay time. The envelope decay of the initial part of the ACF can be fitted by a straight line in a range from 0 dB to -5 dB, and the effective duration τ e of the ACF can be easily obtained from the decay rate extrapolated at -10 dB [3]. The integration time duration (2T) was set at 2.5 s for our ACF analysis of τ e , which is the shortest duration needed to make subjective preference judgments [3].…”

“…The envelope decay of the initial part of the ACF can be fitted by a straight line in a range from 0 dB to -5 dB, and the effective duration τ e of the ACF can be easily obtained from the decay rate extrapolated at -10 dB [3]. The integration time duration (2T) was set at 2.5 s for our ACF analysis of τ e , which is the shortest duration needed to make subjective preference judgments [3]. Calculating τ e of ACF in alphawave range, the occipital area in both left and right hemispheres of each subject's head (Fig.…”

“…Ando and Chen and Chen and Ando developed a method of using the autocorrelation function (ACF) to analyze brain waves [3][4]. They analyzed the effective duration of the envelope of the normalized ACF (τ e ) of the alpha waves under changing the delay time of the single reflection (∆t 1 ) and the subsequent reverberation time (T sub ), which are temporal factors.…”