Standard hearing-aid gain prescriptions may under-amplify high frequencies at low presentation levels.

Evidence

Glyde et al. ( 2013 ) showed that even with frequency-specific gain applied according to the individual audiogram using the NAL-RP hearing aid prescription, a strong relationship between SRM and hearing status persisted. The authors noted that with the relatively low presentation levels used in their experiment (55 dB SPL masker), the NAL-RP prescription may not have provided sufficient gain especially in the high frequency region. Thus in a follow-up experiment (Glyde et al., 2015 ), they examined the effect of providing systematically more high-frequency gain than that provided by NAL-RP. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1721

Categorization

• XREF: Relevant to how measured ‘hearing-loss deficits’ may partly be amplification artifacts rather than true neural/spatial problems.
• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 1721