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A proposal is made that 15 dB HL, rather than 25 dB HL, be considered the upper limit of normal hearing sensitivity. This recommendation is based on an explanation of the change from an earlier philosophy and the fact that so many people with hearing levels that average less than 25 dB HL consider themselves to have hearing difficulty. Such reclassification of people with slight to mild hearing losses would dignify their clinical complaints and aid in counseling that would assist them with their hearing difficulties.
Martin et al. (Tue,) studied this question.