Abstract

Lingual vibrotactile thresholds were obtained for 10 normal subjects under four different conditions: (1) bilateral auditory masking during reading, (2) right ear auditory masking during reading, (3) left ear auditory masking during reading, (4) no auditory masking during reading. Baseline thresholds were obtained prior to any exposure to masking. To investigate changes in the articulatory patterns of the subjects under masking conditions, four acoustic measurements were obtained from a test word embedded in a stimulus sentence: (1) stop closure duration, (2) voice onset time, (3) vowel duration, (4) duration of final stop closure. The different types of auditory disruptions during speech production resulted in a decrease in lingual sensitivity as well as temporal reorganization of articulatory speech patterns. Although fluctuations were observed in speech segment measurements during masking conditions, laterality of masking appears to have no effect on temporal articulatory speech patterns.

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