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Two-tone masking in normal hearing listeners

W M Rabinowitz, R C Bilger, C Trahiotis

    The Journal of the Acoustical Society of America
    |October 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

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    This study measured critical bandwidth using two-tone masking, finding estimates approximated normative values. Masker level effects were analyzed, suggesting adjustments for more accurate critical-band mechanism insights.

    Area of Science:

    • Auditory psychophysics
    • Psychoacoustics
    • Hearing science

    Background:

    • Two-tone masking is a key paradigm for investigating auditory perception.
    • Critical bandwidth (CB) estimation is crucial for understanding auditory filtering.
    • Previous studies show masker level influences CB estimates.

    Purpose of the Study:

    • To measure psychophysical critical bandwidth using two-tone masking across various frequencies.
    • To analyze the relationship between masker level and critical bandwidth estimates.
    • To discuss implications for the underlying critical-band mechanism.

    Main Methods:

    • Psychophysical measurements using a 4IFC adaptive procedure with 58 untrained subjects.
    • Two-tone masking presented at 0.25, 0.5, 1, 2, and 4 kHz with a masker level of 62 dB SPL/tone.

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  • Data analyzed using two-line-regression to estimate critical bandwidth.

    • Main Results:

    • Individual data exhibited high variability, but average data were systematic.
    • Estimated critical bandwidth values approximated normative values.
    • Literature analysis revealed a substantial increase in estimated CB with masker level in two-tone masking.

    Conclusions:

    • A portion of the masker level effect on CB appears artificial due to masker tone frequency.
    • An alternative masker-frequency spacing is proposed to mitigate level-dependent artifacts.
    • Findings contribute to understanding the auditory critical-band mechanism.