Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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A study on the estimation of auditory filter shape by notch noise masking

노치 잡음 마스킹 방법에 의한 청각 필터의 특성에 관한 연구

  • 김영훈 (서울대학교 의과대학 의공학교실, 공과대학 의공학 협동과정) ;
  • 박광석 (서울대학교 의과대학 의공학교실, 공과대학 의공학 협동과정)
  • Published : 1991.05.15
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Abstract

In this study, peripheral auditory system has been modeled as a filter bank of overlaping bandpass filters, and auditory filter shape has been estimated by notch noise masking. The filter was centered at 1kHz, and noise level was set to 40dB SPL. Masker noise was generated by summing sinusoidal functions with random phase for very steep skirts. To estimate threshold we used two alternative forced choice with 500 msec of duration. We measured threshold with notch width at 0.05,0.1,0.2,0.3,0.4 and 0.5. The filter was asymmetric with steeper upper branch and its ERB was 168 - 192 Hz.

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