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Normal hearing thresholds for clicks

D R Stapells, T W Picton, A D Smith

    The Journal of the Acoustical Society of America
    |July 1, 1982
    PubMed
    Summary
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    This study determined normal hearing thresholds for clicks, finding that presentation rate significantly impacts results. A root-mean-square measure (SPL(1ms)) provided the most consistent hearing threshold measurements for clicks with varying symmetry.

    Area of Science:

    • Audiology
    • Acoustics
    • Psychoacoustics

    Background:

    • Determining accurate hearing thresholds for transient sounds like clicks is crucial for audiological assessments.
    • Standard sound pressure level (SPL) measurements may not adequately capture the characteristics of brief acoustic stimuli.

    Purpose of the Study:

    • To evaluate normal hearing thresholds for clicks.
    • To investigate the influence of listening period duration, presentation rate, polarity, and symmetry on click hearing thresholds.
    • To compare different measurement metrics (peak SPL, peak equivalent SPL, SPL(1ms)) for click thresholds.

    Main Methods:

    • Hearing thresholds for clicks were measured in 40 normal young adults.
    • Stimuli included 100-microsecond square-wave clicks presented via TDH-49 earphones.

    Related Experiment Videos

  • Variations in listening period duration (2s down to 100ms), presentation rate (5 to 80/s), and click polarity were assessed.
  • Different SPL measurement methods were compared: peak SPL, peak equivalent SPL, and SPL(1ms).

    • Main Results:

    • No significant threshold changes were observed for listening periods from 2s to 300ms, but a 2.5 dB increase occurred from 300ms to 100ms.
    • Increasing stimulus presentation rate from 5 to 80/s decreased thresholds by 4.5 dB per tenfold rate change.
    • No significant threshold differences were found between rarefaction and condensation clicks.
    • SPL(1ms) provided more consistent thresholds for clicks with varying symmetry compared to peak SPL or peak equivalent SPL.

    Conclusions:

    • Click hearing thresholds are influenced by presentation rate and, to a lesser extent, listening duration.
    • The SPL(1ms) measurement offers a more reliable method for determining click hearing thresholds, especially for stimuli with asymmetrical waveforms.
    • These findings have implications for standardizing click-based audiological tests.