The relation between Hearing Handicap Scale (HHS) scores and selected measures of both sensitivity loss and speech discrimination loss was studied on 60 hearing-impaired patients (5 conductive, 6 mixed, and 49 sensorineural). Correlations of HHS with sensitivity indices were moderately high (about 0.65), in contrast to the low correlations (about 0.35) with measures of discrimination. Use of a new index that incorporates information about both sensitivity and discrimination yielded a correlation no higher than the sensitivity measures alone.
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Speaks et al. (1970) studied this question.