| Pitch-ranking of electric and acoustic stimuli by cochlear implant users with the HiRes and Fidelity120 speech processing strategies. | |
| | |
MedLine Citation:
|
PMID: 20330318 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
Estimates of place-pitch sensitivity in cochlear implant (CI) users are typically obtained using electric pulse trains presented directly to the implanted electrodes. Such estimates may overestimate the place-pitch sensitivity available to these listeners through their speech processors due to spectral smearing by the analysis filters. To determine the influence of speech processing on place-pitch sensitivity, electric pitch-ranking (EPR) and acoustic pitch-ranking (APR) thresholds were compared in four users of the Advanced Bionics CI. EPR thresholds were obtained for single- and dual-electrode pulse-train stimuli presented to electrodes near the center of the array. APR thresholds were obtained for pure tones having frequencies corresponding to the tonotopic locations of the electric pulse trains, using both the HiRes and Fidelity120 speech processing strategies. Counter to expectation, APR thresholds were similar to EPR thresholds for three of four subjects, and APR thresholds were smaller than EPR thresholds for the remaining subject. APR thresholds did not differ systematically for the HiRes and Fidelity120 strategies, consistent with Nogueira et al. [(in press). EURASIP J Adv Signal Proc]. Findings suggest that CI users can make use of across-channel cues when performing an APR task and that such cues can compensate for spectral smearing by the analysis filters. |
| | |
Authors:
|
Benjamin A Russell; Gail S Donaldson |
Related Documents
:
|
1294198 - The function relating the subjective magnitude of brain stimulation reward to stimulati... 544958 - A new moving-coil microelectrode puller. 8145588 - Grasp synthesis for upper-extremity fns. part 2. evaluation of the influence of electro... 9193058 - Psychometric functions and temporal integration in electric hearing. 2628638 - Oxygen uptake and efficiency related to external work rate during loaded walking. 12015118 - Evidence for surface-based processing of binocular disparity. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Mar |
Date Detail:
|
Created Date: 2010-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
|
Languages: eng Pagination: 1811 Citation Subset: IM |
Affiliation:
|
Dept. of Comm. Sci. and Disord., Univ. of South Florida, Tampa, FL 33620, barussel@mail.usf.edu. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Lowering mean fundamental frequency to improve speech intelligibility in noise under simulated elect...
Next Document: Effect of waveform shape and polarity on loudness and on place pitch for cochlear implant users.