title: [Tone recognition and electrode discrimination in prelingually deafened cochlear-implant listeners].
abstract: OBJECTIVE
  To investigate tone recognition and electrode discrimination in prelingually deafened children with the Nucleus device, and to develop guidelines for customized mapping in the implant users.
  
  
  METHODS
  Fourteen prelingually deafened children with cochlear implants participated in this study. Tone recognition was measured with a four-alternative, forced choice procedure from 25 consonant-vowel syllables, each of which had four tonal variations. Electrode discrimination was measured using a same-difference procedure on 7 pairs of electrodes covering the entire electrode array.
  
  
  RESULTS
  Tone recognition ranged from 35% to 99% correct with a mean of 62.8% and standard deviation of 14.7% in these users. Electrode discrimination had the mean threshold of 3.4 +/- 0.9, with the best performance from the middle electrodes (E 14 and E 17) at 2.6 and the followed performance at the most apical electrode (E 20).
  
  
  CONCLUSIONS
  The results showed significant individual differences from both tone recognition and electrode discrimination, but there is significant correlation between them.
authors.affiliation: Cochlear Implant Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Chao-gang
authors.initials: CG
authors.lastname: Wei
authors.forename: Ke-li
authors.initials: KL
authors.lastname: Cao
authors.forename: Xiao-wei
authors.initials: XW
authors.lastname: Chen
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.forename: Zhen-yu
authors.initials: ZY
authors.lastname: Zheng
authors.forename: Fan-gang
authors.initials: FG
authors.lastname: Zeng
mesh_terms: D000293:Adolescent; D002648:Child; D019929:Cochlear Implantation; D003054:Cochlear Implants; D004558:Electric Stimulation; D004566:Electrodes; D004867:Equipment Design; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000534:rehabilitation / Q000601:surgery*; D006801:Humans; D007804:Language Development; D008297:Male; D013063:Speech Discrimination Tests; D013067:Speech Perception