Abstract
In subjects with sensorineural hearing impairment many psychophysical functions are deteriorated. However, there is only little knowledge about the impact of these deteriorations on speech intelligibility. Especially the psychophysical correlates of impaired speech intelligibility in background noise are unknown. Some authors suggest a detrimental effect on speech intelligibility due to a reduced frequency resolving power of pathological ears (Evans, 1978; Scharf, 1978). Experimental evidence for this hypothesis is provided by studies of Ritsma et al. (1980) and Festen and Plomp (1983). Others point out the importance of a normal temporal resolution for the petception of speech (Elliott, 1975; Danaher, Wilson and Pickett, 1978). Tyler and Summerfield (1980) found a significant correlation between gap detection and speech intelligibility in noise, indicating a possible relationship. However, in our opinion the relations between speech perception and temporal properties of the ear are underexposed.
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