Accuracy of Cochlear Implant Recipients on Pitch Perception, Melody Recognition, and Speech Reception in Noise

• DOI: 10.1097/aud.0b013e3180479318
• Publication Date: 2007-05-07T08:01:51Z
• Authors: Kate Gfeller; Christopher Turner; Jacob Oleson; Xuyang Zhang; Bruce Gantz; Rebecca Froman; Carol Olszewski
• Keywords: Pitch detection algorithm

In Brief Objective: The purposes of this study were to (a) examine the accuracy cochlear implant recipients who use different types devices and signal processing strategies on pitch ranking as a function size interval frequency range (b) relations between perception measure demographic variables, melody recognition, speech reception in background noise. Design: One hundred fourteen users 21 normal-hearing adults tested discrimination task (pitch ranking) that required them determine direction change base size. Three groups tested: long electrode (N = 101); short received acoustic plus electrical stimulation (A+E) 13); (c) (NH) comparison group 21). Pitch was at standard frequencies 131 1048 Hz, pitch-change intervals ranged from 1 4 semitones. A generalized linear mixed model (GLMM) fit predict if differences exist Overall significance effects measured with Chi-square tests individual t-tests. correlated measures (age time testing, length profound deafness, months use), difference limens, familiar two Results: performed significantly poorer than NH A+E group. similarly listeners lower range, but their scores deteriorated slightly higher range. recipients, although less accurate participants groups, tended perform greater within There statistically significant correlations recognition well pure-tone limens 200 400 Hz. Conclusions: Low-frequency hearing improves compared traditional, electric-only implants. These findings have implications for musical tasks such recognition. (CI) using conventional hybrid (acoustic + electric stimulation, E) range; relationships E pure tone