AUDITORY FILTER ASYMMETRY AT 2000 HZ IN 80 NORMAL-HEARING EARS

Auditory filter asymmetry, bandwidth, dynamic range, and efficiency wa s measured at 2000 Hz in both ears of 40 naive, normal-hearing adults, counterbalanced for sex and initial ear tested. The filters were meas ured with 200-ms tonal signals temporally centered in 300-ms maskers. The maskers were notched noises presented at a spectrum level of 40 dB SPL. Quiet thresholds for the signal were also obtained. The distribu tions of the measured variables and correlations between them are repo rted. The average filter was nearly symmetric but the most common filt ers had steeper upper slopes. The shapes of the two sides of the filte r were independent. Filter asymmetry was not correlated with the equiv alent rectangular bandwidth (ERB), and quiet threshold was not consist ently correlated with the dynamic range of the filter or with ERB. The mean ERB was 255 Hz. (C) 1996 Acoustical Society of America.