Journal article
Accuracy of cochlear implant recipients on pitch perception, melody recognition, and speech reception in noise
Ear and hearing, Vol.28(3), pp.412-423
06/2007
DOI: 10.1097/aud.0b013e3180479318
PMID: 17485990
Abstract
The purposes of this study were to (a) examine the accuracy of cochlear implant recipients who use different types of devices and signal processing strategies on pitch ranking as a function of size of interval and frequency range and (b) to examine the relations between this pitch perception measure and demographic variables, melody recognition, and speech reception in background noise.
One hundred fourteen cochlear implant users and 21 normal-hearing adults were tested on a pitch discrimination task (pitch ranking) that required them to determine direction of pitch change as a function of base frequency and interval size. Three groups were tested: (a) long electrode cochlear implant users (N = 101); (b) short electrode users that received acoustic plus electrical stimulation (A+E) (N = 13); and (c) a normal-hearing (NH) comparison group (N = 21). Pitch ranking was tested at standard frequencies of 131 to 1048 Hz, and the size of the pitch-change intervals ranged from 1 to 4 semitones. A generalized linear mixed model (GLMM) was fit to predict pitch ranking and to determine if group differences exist as a function of base frequency and interval size. Overall significance effects were measured with Chi-square tests and individual effects were measured with t-tests. Pitch ranking accuracy was correlated with demographic measures (age at time of testing, length of profound deafness, months of implant use), frequency difference limens, familiar melody recognition, and two measures of speech reception in noise.
The long electrode recipients performed significantly poorer on pitch discrimination than the NH and A+E group. The A+E users performed similarly to the NH listeners as a function of interval size in the lower base frequency range, but their pitch discrimination scores deteriorated slightly in the higher frequency range. The long electrode recipients, although less accurate than participants in the NH and A+E groups, tended to perform with greater accuracy within the higher frequency range. There were statistically significant correlations between pitch ranking and familiar melody recognition as well as with pure-tone frequency difference limens at 200 and 400 Hz.
Low-frequency acoustic hearing improves pitch discrimination as compared with traditional, electric-only cochlear implants. These findings have implications for musical tasks such as familiar melody recognition.
Details
- Title: Subtitle
- Accuracy of cochlear implant recipients on pitch perception, melody recognition, and speech reception in noise
- Creators
- Kate Gfeller - School of Music, Department of Speech Pathology and Audiology, Iowa Cochlear Implant Clinical Research Center, USA. kay-gfeller@uiowa.eduChristopher TurnerJacob OlesonXuyang ZhangBruce GantzRebecca FromanCarol Olszewski
- Resource Type
- Journal article
- Publication Details
- Ear and hearing, Vol.28(3), pp.412-423
- Publisher
- United States
- DOI
- 10.1097/aud.0b013e3180479318
- PMID
- 17485990
- ISSN
- 0196-0202
- eISSN
- 1538-4667
- Grant note
- P50 DC000242 / NIDCD NIH HHS 1R01-DC000377 / NIDCD NIH HHS 2-P50-DC00242 / NIDCD NIH HHS RR00059 / NCRR NIH HHS
- Language
- English
- Date published
- 06/2007
- Academic Unit
- School of Music; Communication Sciences and Disorders; Biostatistics; Neurosurgery; Otolaryngology
- Record Identifier
- 9983997357302771
Metrics
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