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  • Title: Effects of center frequency on binaural auditory filter bandwidth in the human brain.
    Author: Soeta Y, Shimokura R, Nakagawa S.
    Journal: Neuroreport; 2008 Nov 19; 19(17):1709-13. PubMed ID: 18841088.
    Abstract:
    Effects of center frequency on the binaural auditory filter in the human auditory cortex were examined using auditory-evoked magnetic fields. Two tones with different frequency separations, which were presented dichotically to the left and right ears, were used as the sound stimuli. Eight normal-hearing participants took part in the study. The amplitudes of the N1m components of auditory-evoked magnetic fields were approximately constant when the frequency separation was less than 10-20% of the center frequency; however, the N1m amplitudes increased with increasing frequency separation when the frequency separation was greater than 10-20% of the center frequency. This indicates that binaural auditory filter bandwidth is approximately 10-20% of the center frequency.
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