Profile of Auditory Temporal Processing in Older Listeners This investigation examined age-related performance differences on a range of speech and nonspeech measures involving temporal manipulation of acoustic signals and variation of stimulus complexity. The goal was to identify a subset of temporally mediated measures that effectively distinguishes the performance patterns of younger and older listeners, with and without ... Research Article
Research Article  |   April 01, 1999
Profile of Auditory Temporal Processing in Older Listeners
 
Author Affiliations & Notes
  • Sandra Gordon-Salant
    University of Maryland College Park
  • Peter J. Fitzgibbons
    Gallaudet University Washington, DC
  • Contact author: Sandra Gordon-Salant, PhD, University of Maryland, Department of Speech & Hearing Sciences, College Park, MD 20742.
    Contact author: Sandra Gordon-Salant, PhD, University of Maryland, Department of Speech & Hearing Sciences, College Park, MD 20742.×
  • Corresponding author: e-mail: sgordon@bss1.umd.edu
Article Information
Hearing & Speech Perception / Acoustics / Hearing Disorders / Hearing / Research Articles
Research Article   |   April 01, 1999
Profile of Auditory Temporal Processing in Older Listeners
Journal of Speech, Language, and Hearing Research, April 1999, Vol. 42, 300-311. doi:10.1044/jslhr.4202.300
History: Received August 10, 1998 , Accepted November 2, 1998
 
Journal of Speech, Language, and Hearing Research, April 1999, Vol. 42, 300-311. doi:10.1044/jslhr.4202.300
History: Received August 10, 1998; Accepted November 2, 1998

This investigation examined age-related performance differences on a range of speech and nonspeech measures involving temporal manipulation of acoustic signals and variation of stimulus complexity. The goal was to identify a subset of temporally mediated measures that effectively distinguishes the performance patterns of younger and older listeners, with and without hearing loss. The nonspeech measures included duration discrimination for simple tones and gaps, duration discrimination for tones and gaps embedded within complex sequences, and discrimination of temporal order. The speech measures were undistorted speech, time-compressed speech, reverberant speech, and combined time-compressed + reverberant speech. All speech measures were presented both in quiet and in noise. Strong age effects were observed for the nonspeech measures, particularly in the more complex stimulus conditions. Additionally, age effects were observed for all time-compressed speech conditions and some reverberant speech conditions, in both quiet and noise. Effects of hearing loss were observed also for the speech measures only. Discriminant function analysis derived a formula, based on a subset of these measures, for classifying individuals according to temporal performance consistent with age and hearing loss categories. The most important measures to accomplish this goal involved conditions featuring temporal manipulations of complex speech and nonspeech signals.

ACKNOWLEDGMENTS
This research was supported by a grant from the National Institute of Aging (AG R01 09191). The authors are grateful to Cheryl Neylon and Hillary Crowley for their assistance with the collection of data for this project.
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