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Development of a test of speech intelligibility in noise using sentence materials with controlled word predictability


Journal of the Acoustical Society of America 61(5): 1337-1351
Development of a test of speech intelligibility in noise using sentence materials with controlled word predictability
A test of everyday speech reception was described in which a listener's utilization of the linguistic-situational information of speech was assessed, and was compared with the utilization of acoustic-phonetic information. The test items were sentences which were presented in babble-type noise, and the listener response was the final word in the sentence (the key word) which was always a monosyllabic noun. Two types of sentences were used: high-predictability items for which the key word was somewhat predictable from the context and low-predictability items for which the final word could not be predicted from the context. Both types were included in several 50 item forms of the test, which were balanced for intelligibility, key-word familiarity and predictability, phonetic content and length. Performance of normally hearing people for various signal-to-noise ratios showed significantly different functions for low- and high-predictability items. The potential applications of this test, particularly in the assessment of speech reception in the hearing impaired, were discussed.

Accession: 005132139

PMID: 881487

DOI: 10.1121/1.381436

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