ERIC Number: EJ789715
Record Type: Journal
Publication Date: 2008-Apr
Reference Count: 0
Binaural Advantage for Younger and Older Adults with Normal Hearing
Dubno, Judy R.; Ahlstrom, Jayne B.; Horwitz, Amy R.
Journal of Speech, Language, and Hearing Research, v51 n2 p539-556 Apr 2008
Purpose: Three experiments measured benefit of spatial separation, benefit of binaural listening, and masking-level differences (MLDs) to assess age-related differences in binaural advantage. Method: Participants were younger and older adults with normal hearing through 4.0 kHz. Experiment 1 compared spatial benefit with and without head shadow. Sentences were at 0 degree, and speech-shaped noise was at 0 degree, 90 degree, or plus or minus 90 degree. Experiment 2 measured binaural benefit with the near ear unplugged compared with plugged for sentences at 0 degree and masker at 90 degree. Experiment 3 measured MLDs under earphones for 0.5-kHz pure tones in Gaussian and low-noise noise, and spondees in speech-shaped noise. Results: Spatial-separation benefit for speech did not differ significantly for younger and older adults but was smaller than predicted by an audibility-based model for older adults and larger than predicted for younger adults. Binaural listening benefit was observed for younger participants only. Tonal MLDs suggested that listeners benefit from interaural difference cues during noise dips for signals out of phase. Neither tonal nor speech MLDs differed significantly between younger and older participants. Conclusion: Binaural processing of sentences revealed some age-related deficits in the use of interaural difference cues, whereas no deficits were observed for more simple detection or recognition tasks.
Descriptors: Sentences, Cues, Older Adults, Hearing (Physiology), Age Differences, Adults, Spatial Ability, Audio Equipment, Evaluation Methods, Task Analysis, Auditory Stimuli
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: firstname.lastname@example.org; Web site: http://www.asha.org/about/publications/journal-abstracts/jslhr/
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A