Fitting hearing aids with the Articulation Index: Impact on hearing aid effectiveness

Although most clinical tests focus on how much a particular hearing aid imp roves speech audibility under controlled conditions, it is unclear how thes e measures relate to hearing aid effectiveness, or the benefit perceived by the patient under everyday conditions. In this study, the relationship bet ween audibility and hearing aid effectiveness was examined in a cohort of p atients who obtained hearing aids through the Veteran's Administration. The measure of audibility was the Articulation Index, a common index of speech audibility. Measures of effectiveness included two hearing-specific survey s and self-reported ratings of global satisfaction and hearing aid use adhe rence. Results indicated that there were no systematic relationships betwee n measurements of improved audibility and patient ratings of communication ability. Additionally, improved audibility was not related to overall satis faction with the amplification characteristics of the hearing aid (fitting) . However, improved audibility is related to hearing aid use adherence, wit h patients who achieve better audibility reporting that they use their hear ing aids more frequently.