An alternate method for determining functional gain of hearing aids

D. Rines, P. G. Stelmachowicz, M. P. Gorga

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The functional gain of a hearing aid typically is determined by comparing aided and unaided behavioral thresholds. With this method, however, true gain may be underestimated in frequency regions of normal or near-normal hearing sensitivity (i.e., in cases of sloping, rising, or trough-shaped audiograms). Internal hearing-aid noise and/or amplified room noise imposes a lower limit on obtainable aided thresholds. In these cases, comparing aided and unaided acoustic-reflex thresholds may be a valuable clinical alternative to traditional means of determining real-ear gain. This study compared sound-field behavioral threshold and acoustic-reflex threshold estimates of functional gain for individuals with a variety of audiometer configurations. The sound-field behavioral threshold measurements were found to underestimate functional gain if unaided thresholds approached the normal hearing range. In regions of greater hearing loss, behavioral and acoustic-reflex estimates of functional gain were in good agreement.

Original languageEnglish (US)
Pages (from-to)627-633
Number of pages7
JournalJournal of Speech and Hearing Research
Issue number4
StatePublished - 1984

ASJC Scopus subject areas

  • Otorhinolaryngology


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