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Aging and Spectro-Temporal Integration of Speech.
John H Grose1, Heather L Porter2, Emily Buss3
1Department of Otolaryngology-Head and Neck Surgery, University of North Carolina at Chapel Hill, NC, USA john_grose@med.unc.edu.
Trends in Hearing
|October 16, 2016
Summary
Age does not significantly impact the spectro-temporal integration of speech, even in older adults with good hearing. This research found no age-related deficits in integrating speech fragments across different frequencies, times, or ears.
Area of Science:
- Auditory Neuroscience
- Speech Perception
- Psychoacoustics
Background:
- Spectro-temporal integration is crucial for understanding speech.
- Previous research suggests age-related declines in auditory processing.
- The specific impact of age on integrating speech across multiple dimensions is not fully understood.
Purpose of the Study:
- To investigate the effects of aging on the spectro-temporal integration of speech.
- To test the hypothesis that older listeners have reduced integration abilities.
- To examine if age impacts integration across frequency, time, and binaural presentation.
Main Methods:
- Participants: Younger, middle-aged, and older adults with normal audiometric hearing.
- Stimuli: Sentences filtered into two bands (500 Hz and 2500 Hz), with adjustable bandwidth.
- Conditions: Seven configurations varying spectral, temporal (10 Hz interruption), and binaural presentation of speech fragments.
Main Results:
- Speech intelligibility varied across conditions but was not significantly affected by listener age.
- No evidence of performance deficits in older listeners was found in any tested configuration.
- Age did not differentially impact the ability to integrate speech fragments across frequency, time, or ear.
Conclusions:
- Aging, in itself, does not necessarily impair the ability to integrate speech fragments.
- Auditory processing for spectro-temporal integration remains robust in older adults with normal hearing.
- Further research may explore other factors influencing speech perception in aging populations.
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