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Related Experiment Videos

Gap detection in normal and hearing-impaired listeners

P J Fitzgibbons, F L Wightman

    The Journal of the Acoustical Society of America
    |September 1, 1982
    PubMed
    Summary

    Hearing-impaired listeners have poorer temporal resolution than normal-hearing individuals. This difference in temporal gap detection persists across various sound frequencies and presentation levels.

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    Area of Science:

    • Auditory Neuroscience
    • Psychoacoustics
    • Speech Perception

    Background:

    • Temporal resolution is crucial for auditory perception and speech understanding.
    • Cochlear impairments can significantly affect auditory processing, including temporal aspects.

    Purpose of the Study:

    • To assess and compare temporal resolution between normal-hearing and cochlear-impaired listeners.
    • To investigate the influence of sound frequency on temporal gap detection.

    Main Methods:

    • Measured minimum detectable temporal gap (delta t ms) using octave-band noises (400-800 Hz, 800-1600 Hz, 2000-4000 Hz).
    • Utilized a broadband notched noise masker to isolate spectral cues.
    • Tested participants with normal hearing and cochlear impairments.

    Main Results:

    • Temporal resolution improved with increasing center frequency in all listeners.
    • Cochlear-impaired listeners demonstrated significantly poorer temporal resolution compared to normal-hearing listeners.
    • Impaired resolution was observed irrespective of sound pressure level or sensation level comparisons.

    Conclusions:

    • Cochlear impairment leads to deficits in temporal resolution.
    • Frequency-dependent improvements in temporal processing are present in both normal and impaired hearing.
    • These findings highlight the impact of cochlear damage on fundamental auditory temporal processing abilities.

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