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The integration of nonsimultaneous frequency components into a single virtual pitch
1Department of Speech and Hearing Sciences, University of Hong Kong. vciocca@hkusua.hku.hk
The Journal of the Acoustical Society of America
|April 23, 1999
Summary
Nonsimultaneous frequency components influence virtual pitch perception. Components presented after the target sound contribute more to virtual pitch than preceding components, especially over longer durations.
Area of Science:
- Auditory Neuroscience
- Psychoacoustics
Background:
- The perception of pitch from complex sounds, or virtual pitch, is influenced by the harmonic series.
- Understanding how nonsimultaneous frequency components affect virtual pitch is crucial for auditory processing models.
Purpose of the Study:
- To investigate how nonsimultaneous frequency components, presented before or after a target sound, impact virtual pitch perception.
- To determine the temporal integration window for pitch processing.
Main Methods:
- A pitch matching task was employed using a harmonic series with a mistuned 4th harmonic.
- Experiments varied the timing of the mistuned component (simultaneous, pre-target, post-target) and introduced silent gaps of varying durations.
Main Results:
- Pre-target components produced smaller pitch shifts than simultaneous components.
- Post-target components produced pitch shifts comparable to simultaneous components, even with significant silent gaps.
- Pitch shift elimination required longer silent gaps for post-target components compared to pre-target components.
Conclusions:
- Nonsimultaneous components occurring after the target onset contribute more significantly to virtual pitch perception.
- The temporal window for pitch processing extends longer for post-target components than for pre-target components.
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