Work out hearing aid gain instantly with clear inputs, formula shown and shareable results.
Applies the classic linear prescription rules — half gain, third gain and Berger — to a hearing threshold and shows the resulting output level.
Linear gain rules
Gain = threshold x factor, with 0.5 for the half gain rule, 0.33 for the third gain rule and 0.6 for Berger; output = input level + gain
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
They are teaching and sanity-check rules; modern fittings use NAL-NL2 or DSL v5 nonlinear prescriptions.
Full gain would make loud sounds uncomfortable and does not match how loudness perception recruits in sensorineural loss.