Title

Backward Masking and Speech Perception

Presentation Type

Poster

Abstract

Backward masking (BM) has shown differential effects with age and auditory processing. BM may be related to reduced speech discrimination. This study utilized 21 Vowel-Consonant (VC) stimuli followed by a white noise masker. The Interstimulus Interval (ISI) is the time between a presented consonant and the masking noise. The ISI interval was 5 msec and the noise duration was 50, 100 and 200 msec. Each stimulus was randomly presented ten times. Confusion matrices were obtained by having the subject respond to the presented consonant. The confusion matrix is essentially the correct and incorrect responses. The data yielded consonant intelligibility and information transmission for distinctive features. The results indicated a reduction in selected features as well as reduced consonant identification as BM became more effective. This study provides evidence for reduced speech understanding in children and adults with auditory processing deficits and the elderly experiencing hearing difficulties.

Category

Life Sciences

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Apr 15th, 3:00 PM Apr 15th, 4:00 PM

Backward Masking and Speech Perception

Backward masking (BM) has shown differential effects with age and auditory processing. BM may be related to reduced speech discrimination. This study utilized 21 Vowel-Consonant (VC) stimuli followed by a white noise masker. The Interstimulus Interval (ISI) is the time between a presented consonant and the masking noise. The ISI interval was 5 msec and the noise duration was 50, 100 and 200 msec. Each stimulus was randomly presented ten times. Confusion matrices were obtained by having the subject respond to the presented consonant. The confusion matrix is essentially the correct and incorrect responses. The data yielded consonant intelligibility and information transmission for distinctive features. The results indicated a reduction in selected features as well as reduced consonant identification as BM became more effective. This study provides evidence for reduced speech understanding in children and adults with auditory processing deficits and the elderly experiencing hearing difficulties.