Bilateral hearing aids use reduced gain due to loudness summation

Evidence

Models of loudness therefore incorporate this phenomenon in various ways (Zwicker and Scharf 1965 ; Moore and Glasberg 1996a , b ; Moore and Glasberg 2007 ). These models can be used in hearing-aid fitting (e.g. Moore and Glasberg 2004 ), so hearing aids fitted using these models will have relatively reduced gain when fitted bilaterally in order to achieve a comfortable maximum loudness level. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1526

Categorization

• XREF: Directly connects to hearing-aid fitting protocols and the loudness models of Moore and Glasberg that form the theoretical backbone of modern fitting.
• SHARE: Send to any clinician fitting bilateral hearing aids — the ecological-validity critique here bears directly on their gain prescriptions.