Canadian Journal of Speech-Language Pathology and Audiology

Suggested Crossover Frequencies and Compression Ratios for a Two-channel Wide Dynamic Range Compression Hearing Aid

Author(s) Donald E Hayes, MA
Volume 20
Number 4
Year 1996
Page(s) 232-239
Language English
Keywords compression
Abstract Forty hearing-impaired participants were fitted with the ReSound ED2 two-channel two-memory wide dynamic range compression hearing aid. After participants had worn the ED2 for six months, the final settings for crossover frequency (CF) and compression ratio (CR) for each channel were documented. There were statistically significant correlations between the slope of hearing loss and the programmed CF and CR. It was found that as slope increased, the CF increased and the low frequency CR decreased. No participant selected a CF for Memory 2 shich was lower than the CF for Memory 1. It is recommended that the interactions between the channels of multichannel instruments and the settings of CF and CR not be overlooked.

Quarante participants se sont fait ajuster la prothèse auditive ReSound ED2 à compression dynamique large, à deux voies et à deux mémoires. Au bout de six mois, on a documenté les réglages définitifs de la fréquence de coupure (FC) et des rapports de compression (RC) de chaque canal. Des corrélations statistiquement significatives existaient entre la courbe de la perte auditive et la FC et les RC programmés. On a découvert qu'une augmentation de la courbe a entraîné une augmentation de la FC et une diminution des RC à basse fréquence. Aucun participant n'a choisi une FC de la mémoire 2 inférieure à la FC de la mémoire 1. Il est recommandé de tenir compte des interactions entre les canaux des instruments multicanal et de l'importance d'un réglage approprié de la FC et des RC.
Record ID 162

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