Fitting recommendations and clinical benefit associated with use of the NAL-NL2 hearing-aid prescription in Nucleus cochlear implant recipients

Ruth English*, Kerrie Plant, Michael Maciejczyk, Robert Cowan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Objective: For a group of cochlear implant recipients, who use hearing aids in the contralateral ear, the benefit of NAL-NL2 relative to a recipients’ own prescription was assessed. Whether there was a preferred frequency response and/or gain deviation from NAL-NL2 was then investigated. Design: Speech recognition and self-reported ratings of benefit were examined for the recipients’ own prescription compared to the NAL-NL2 prescription, in the bimodal and hearing-aid alone conditions. Paired-comparison of hearing-aid frequency response was conducted with default NAL-NL2 and two variants, a low frequency boost or cut. Using a loudness balancing procedure, the hearing-aid gain required to achieve equal loudness between the devices was measured. Study sample: Sixteen adults with post-lingual hearing loss. Results: A 22% increase in group median word score in quiet with use of NAL-NL2 in the hearing-aid alone condition. In the bimodal condition there was no improvement with NAL-NL2. Default NAL-NL2 frequency response was preferred by 67% of participants. For 56% of participants, the preferred gain to achieve loudness balance across bimodal devices was within 5-dB of prescribed values. Conclusions: The NAL-NL2 prescription provides a high level of clinical performance, and an acceptable frequency response and gain for most participants.

Original languageEnglish
Pages (from-to)s45-s50
Number of pages6
JournalInternational Journal of Audiology
Volume55
Issue numberSuppl. 2
Early online date3 Feb 2016
DOIs
Publication statusPublished - 2016

Keywords

  • cochlear implant
  • bimodal
  • acoustic hearing
  • hearing-aid prescription

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