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The effect of temporal placement on gap detectability.

K B Snell1, H L Hu

  • 1Audiology Department, Rochester Institute of Technology, New York 14623, USA.

The Journal of the Acoustical Society of America
|January 1, 2000
PubMed
Summary
This summary is machine-generated.

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Detecting silent gaps in noise bursts is harder near the start or end. Gap detectability improves when the gap is closer to the noise burst's center.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Signal detection theory

Background:

  • Masked sinusoid detectability increases as its onset nears the temporal center of a masker.
  • The current study investigates if silent gap detectability in noise bursts follows a similar pattern.
  • Understanding temporal processing is crucial for auditory perception research.

Purpose of the Study:

  • To determine if silent gap detectability in noise bursts is influenced by the gap's temporal placement.
  • To compare gap detection thresholds between experienced and inexperienced listeners.
  • To assess the effect of short-term practice on gap detection.

Main Methods:

  • Gap detection thresholds were measured in 13 subjects (6 inexperienced, 7 experienced) across multiple sessions.

Related Experiment Videos

  • Gaps were presented within 150-ms, low-pass noise bursts at 75 dB SPL, with a 45 dB SPL noise floor.
  • Gap onset positions were varied parametrically relative to the noise burst onset (10-130 ms).

    • Main Results:

    • Gap thresholds were significantly longer (poorer detectability) when gaps were near the noise burst onset or offset.
    • Gap thresholds were significantly shorter (better detectability) when gaps approached the temporal center of the noise burst.
    • Younger, experienced listeners showed significantly shorter thresholds than younger, inexperienced listeners, particularly near stimulus onset/offset.

    Conclusions:

    • Silent gap detectability in noise bursts is position-dependent, mirroring findings for masked sinusoids.
    • Listener experience significantly impacts gap detection performance, especially for temporally peripheral gaps.
    • Temporal placement relative to stimulus onset/offset is a critical factor in auditory gap detection.