Document Detail

Effects of phase duration and electrode separation on loudness growth in cochlear implant listeners.
MedLine Citation:
PMID:  10738817     Owner:  NLM     Status:  MEDLINE    
Loudness estimates were obtained in a group of four adult subjects implanted with the Nucleus-22 multielectrode cochlear implant device, for a range of pulse amplitudes and different fixed phase durations and electrode separations. The stimulus was a 200-ms long train of biphasic pulses presented at 500 pulses/s. Subjects estimated loudness as a number from 0 ("don't hear it") to 100 ("uncomfortably loud"). Loudness was found to grow exponentially with pulse amplitude, at a rate that was dependent upon the phase duration as well as the electrode separation. An equation of the form L = e(lambda + gamma M)(D theta)I, where L is the estimated loudness, M is the separation between electrodes of a stimulating pair, D is the phase duration, I is current amplitude, and lambda, gamma, and theta are constants, appears to describe the observed data adequately. The findings are remarkably consistent across subjects.
M Chatterjee; Q J Fu; R V Shannon
Related Documents :
11219737 - Development of a disposable ethanol biosensor based on a chemically modified screen-pri...
1746827 - Evaluation of the temporal bones of a multichannel cochlear implant patient.
6704717 - Decrease in both choline acetyltransferase activity and eeg patterns in the hippocampal...
7347157 - Lesions made in the rabbit brain to assist the design and use of electrodes for amygdal...
14674507 - In vitro fracture resistance of teeth with dentin-bonded ceramic crowns and core build-...
9874507 - Dysregulation of trace element composition in ovariectomized cynomolgus monkey bones.
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  107     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2000-05-09     Completed Date:  2000-05-09     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1637-44     Citation Subset:  IM    
Department of Auditory Implants and Perception, House Ear Institute, Los Angeles, California 90057, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cochlear Implantation*
Loudness Perception / physiology*
Middle Aged
Models, Biological
Speech Perception / physiology
Time Factors
Grant Support
R01 DC01526-05/DC/NIDCD NIH HHS; R03 DC03519-01/DC/NIDCD NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Tori of confusion: binaural localization cues for sources within reach of a listener.
Next Document:  Place-pitch sensitivity and its relation to consonant recognition by cochlear implant listeners usin...