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Comparing the Effect of Different Hearing Aid Fitting Methods in Bimodal Cochlear Implant Users
Jantien L Vroegop1, J Gertjan Dingemanse1, Marc P van der Schroeff1
1Department of Otorhinolaryngology and Head and Neck Surgery, Erasmus Medical Centre, Rotterdam, the Netherlands.
American Journal of Audiology
|November 2, 2018
Summary
Different hearing aid fitting methods did not impact outcomes for bimodal cochlear implant users. However, bimodal stimulation significantly improved speech in noise and sound localization, confirming its benefit.
Area of Science:
- Audiology
- Neuroscience
- Biomedical Engineering
Background:
- Bimodal cochlear implant (CI) users have one CI and one hearing aid.
- Optimizing hearing aid fitting in bimodal CI users is crucial for maximizing auditory benefits.
- Current fitting methods vary in gain prescription and loudness balancing techniques.
Purpose of the Study:
- To compare the effects of three distinct hearing aid fitting procedures on gain.
- To evaluate the impact of these fittings on bimodal benefit in CI users.
- To determine if different gain prescription rules and loudness balancing impact outcomes.
Main Methods:
- A prospective, cross-over study design was employed.
- Fourteen postlingually deafened adult bimodal CI users participated.
- Hearing aid gain and auditory performance (speech-in-quiet, speech-in-noise, sound localization) were measured.
Main Results:
- No significant differences in hearing aid gain were observed across the three fitting methods.
- No significant differences in bimodal auditory performance were found between the fitting methods.
- A consistent bimodal benefit was observed for speech-in-noise and sound localization across all fittings.
Conclusions:
- Bimodal stimulation provides substantial auditory benefits for CI users with residual hearing.
- The specific hearing aid fitting methods evaluated (gain prescription and loudness balancing) did not significantly alter bimodal benefit on average.
- Further research may explore other fitting parameters or patient-specific factors.
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