Abstract
The present study was designed to further assess the relationship between the acoustic reflex and speech intelligibility. Monosyllabic words mixed with noise were presented to 35 subjects at −6, −3, 0, and +3 dB S/N ratios. The word lists were presented with a 2000-Hz tone in the contralateral ear at a level either 15 dB above or 20 dB below the acoustic reflex threshold. This was performed to evaluate the intelligibility of the monosyllabic words with the acoustic reflex contracted or relaxed. The results indicated that at S/N ratios of −3 and 0 dB a significant decrement in speech intelligibility occurred. A slight but not significant decrement was seen at −6 and +3 dB S/N. The results of the present study show that contraction of the acoustic reflex causes a decrease in speech intelligibility. These results are discussed along with possible reasons to explain the lack of agreement with previous research.
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