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Effect of stimulus bandwidth and duration on monaural envelope correlation perception
Emily Buss1, Huanping Dai2, Joseph W Hall3
1Department of Otolaryngology/Head and Neck Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 ebuss@med.unc.edu.
The Journal of the Acoustical Society of America
|January 26, 2015
Summary
Listeners
Area of Science:
- Auditory perception
- Psychoacoustics
- Signal processing
Background:
- Monaural envelope correlation perception involves discriminating noise bands based on envelope correlation.
- Sensitivity declines with stimulus bandwidth below 100 Hz.
Purpose of the Study:
- To investigate if listener performance is limited by the number of modulation periods within a presentation.
- To evaluate the effects of stimulus bandwidth and duration on monaural envelope correlation perception.
Main Methods:
- Manipulated stimulus bandwidth (25-100 Hz) and duration (25-800 ms).
- Used two noise bands separated by a 500-Hz gap, centered at 2250 Hz.
- Assessed performance in highly trained listeners.
Main Results:
- Performance improved with an increased number of envelope modulation periods.
- Substantial individual differences in performance were observed.
- Listener performance was influenced by both bandwidth and duration.
Conclusions:
- The number of envelope modulation periods is a key factor in monaural envelope correlation perception.
- Auditory processing capabilities vary significantly among individuals.
- Further research is needed to fully understand the factors influencing this perceptual ability.
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