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Auditory temporal gap detection for noise markers with partially overlapping and non-overlapping spectra
1Hearing Research Laboratory, Department of Psychology, Dalhousie University, B3H 4J1, Halifax, NS, Canada. dennis.phillips@dal.ca
Hearing Research
|November 16, 2002
Summary
Listeners
Area of Science:
- Auditory perception
- Psychoacoustics
- Signal processing in hearing
Background:
- Temporal gap detection is crucial for speech and music perception.
- Understanding how spectral properties of masker noise affect gap detection is important.
Purpose of the Study:
- To investigate how spectral overlap/separation of gap markers influences temporal gap detection thresholds.
- To compare gap detection in spectral overlap conditions versus conditions with a wideband masker.
Main Methods:
- Six listeners performed temporal gap detection tasks.
- An adaptive tracking method was used with constant spectrum-level noises.
- Spectral overlap/separation of gap markers and masker bandwidth were systematically varied.
Main Results:
- Gap thresholds were a linear function of spectral dissimilarity in 4/6 listeners under spectral overlap conditions.
- Gap thresholds were inversely related to bandwidth in all listeners under mask conditions.
- Spectral overlap conditions yielded higher gap thresholds than mask conditions with similar within-channel bandwidth.
Conclusions:
- Spectral dissimilarity between gap markers significantly impacts temporal gap detection.
- Spectral dissimilarity can override within-channel auditory information for temporal gap recovery.
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