title: Results of speech processor upgrade in a population of Veterans Affairs cochlear implant recipients.
abstract: OBJECTIVE
  This study aimed to evaluate the change in performance when the Speak processing strategy replaced the Mpeak strategy.
  
  
  METHODS
  Twenty-one veterans who participated in the original Department of Veterans Affairs Multicenter Cochlear Implant Study, received the Nucleus F0F1F2 processor (Cochlear Corp., Englewood, CO, U.S.A.) (WSP) and were subsequently upgraded to the Mpeak (MSP) processing strategy.
  
  
  METHODS
  Closed- and open-set speech recognition in quiet and in noise in auditory only conditions at the phoneme, word, and sentence levels were evaluated.
  
  
  RESULTS
  Changes in audiologic parameters were evaluated using a paired t-test for related samples. Statistically significant improvements in mean scores were found for all tests and were greatest for the speech-in-noise conditions. An examination of individual data revealed that 61% of the subjects improved for tests administered in quiet, whereas up to 69% of the subjects had improved performance in noise. Subjects with no open set speech discrimination using the Mpeak strategy showed no improvement with the Speak strategy.
  
  
  CONCLUSIONS
  Cochlear implants can provide improved performance using modifications to external speech processor hardware and software without changing the internal implant.
authors.affiliation: New York University Medical Center, Veterans Affairs Medical Center, New York, New York, USA.
authors.forename: N L
authors.initials: NL
authors.lastname: Cohen
authors.forename: S B
authors.initials: SB
authors.lastname: Waltzman
authors.forename: J T
authors.initials: JT
authors.lastname: Roland
authors.forename: B
authors.initials: B
authors.lastname: Bromberg
authors.forename: N
authors.initials: N
authors.lastname: Cambron
authors.forename: L
authors.initials: L
authors.lastname: Gibbs
authors.forename: W
authors.initials: W
authors.lastname: Parkinson
authors.forename: C
authors.initials: C
authors.lastname: Snead
mesh_terms: D003054:Cochlear Implants; D006801:Humans; D008875:Middle Aged; D009622:Noise; D013063:Speech Discrimination Tests; D013067:Speech Perception; D016896:Treatment Outcome; D014728:Veterans