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Temporal offset judgments for concurrent vowels by young, middle-aged, and older adults
Daniel Fogerty1, Diane Kewley-Port, Larry E Humes
1Department of Communication Sciences and Disorders, University of South Carolina, Columbia, South Carolina 29208, USA. fogerty@sc.edu
The Journal of the Acoustical Society of America
|June 21, 2012
Summary
Older adults struggle with processing simultaneous sounds due to age-related temporal processing declines. This impacts their ability to distinguish between single, overlapping, or separated vowel sounds.
Area of Science:
- Auditory neuroscience
- Psychoacoustics
- Human aging research
Background:
- Age-related decline in temporal processing can affect auditory perception.
- Understanding how aging impacts the ability to process concurrent sounds is crucial.
Purpose of the Study:
- To investigate age-related differences in processing temporally asynchronous vowel pairs.
- To identify the relationship between temporal processing abilities and auditory perception in older adults.
Main Methods:
- Listeners categorized vowel pairs based on temporal asynchrony.
- Measured boundaries for multiplicity (one vs. multiple sounds) and gap-identification (sound separation).
- Correlated performance with various temporal processing tasks.
Main Results:
- Older listeners required longer temporal offsets to perceive vowel pairs as distinct (multiplicity).
- Middle-aged and older listeners needed longer offsets to identify gaps between sounds.
- Vowel temporal-order thresholds correlated with multiplicity; age and gap detection correlated with gap-identification in older adults.
Conclusions:
- Aging impairs the ability to process temporal aspects of concurrent sounds.
- Specific temporal processing deficits are linked to distinct perceptual boundaries in older adults.
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