Evaluation of Speech Recognition in Noise with Cochlear Implants and Dynamic FM

• DOI: 10.3766/jaaa.20.7.3
• Publication Date: 2009-07-28T00:19:41Z
• Authors: Jace Wolfe; Erin C. Schafer; Benjamin Heldner; Hans Mülder; Emily Ward; Brandon Vincent
• Keywords: Bionics; QUIET

Background: Use of personal frequency-modulated (FM) systems significantly improves speech recognition in noise for users cochlear implants (CIs). Previous studies have shown that the most appropriate gain setting on FM receiver may vary based listening situation and manufacturer CI system. Unlike traditional with fixed-gain settings, Dynamic automatically varies changes ambient level. There are no published reports describing benefits use recipients or how performance as a function manufacturer. Purpose: To evaluate Advanced Bionics Corporation Cochlear using vs. system to examine effects Autosensitivity recipients. Research Design: A two-group repeated-measures design. Participants were assigned group according their type CI. Study Sample: Twenty-five subjects, ranging age from 8 82 years, met inclusion criteria one more experiments. Thirteen subjects used Corporation, 12 implants. Intervention: Speech was assessed while traditional, systems. Data Collection Analysis: In Experiments 1 2, evaluated Hearing Noise Test sentences quiet classroom noise. analysis variance (ANOVA) (Advanced Corporation), (traditional dynamic), level, Experiment 3 determined implant when through processor microphone muted. ANOVA signal-to-noise ratio Autosensitivity. Results: 1, resulted better relative at levels 65, 70, 75 dB SPL. obtained compared When enabled equivalent recipients, than FM. Results indicate signals directed Conclusions: should be considered persons CIs improve At default is but by results performance.