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Related Experiment Videos

Temporal window shape as a function of frequency and level.

C J Plack1, B C Moore

  • 1Department of Experimental Psychology, University of Cambridge, England.

The Journal of the Acoustical Society of America
|May 1, 1990
PubMed
Summary
This summary is machine-generated.

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This study refines the temporal-window model of auditory temporal resolution. Findings show the temporal window

Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Signal Processing

Background:

  • The temporal-window model describes auditory temporal resolution as a sliding temporal integrator.
  • Previous work estimated the temporal window's shape using signal detection thresholds in noise gaps.
  • Further investigation is needed to understand how masker level and frequency affect this temporal window.

Purpose of the Study:

  • To thoroughly examine the effects of masker level and frequency on the auditory system's temporal window shape.
  • To model the temporal window's shape using rounded-exponential (roex) functions.
  • To determine the equivalent rectangular duration (ERD) across different frequencies and levels.

Main Methods:

  • Measured auditory thresholds for brief sinusoidal signals in temporal gaps between noise bursts.

Related Experiment Videos

  • Systematically varied signal frequency (300-8100 Hz) and masker spectrum level (20-dB range).
  • Modeled the temporal window shape using sums of two rounded-exponential (roex) functions.

    • Main Results:

    • Temporal window shape was accurately modeled by two roex functions.
    • Equivalent rectangular duration (ERD) decreased from ~13 ms at 300 Hz to ~7 ms at 8100 Hz.
    • ERD decreased with increasing masker level and was not explained by auditory filter ringing at low frequencies.

    Conclusions:

    • The temporal window's characteristics are significantly influenced by frequency and masker level.
    • The auditory system's temporal integration is frequency-dependent and adapts to masker intensity.
    • The roex function provides a robust mathematical description of the auditory temporal window.