title: Optimization of channel number and stimulation rate for the fast continuous interleaved sampling strategy in the COMBI 40+.
abstract: OBJECTIVE
  To investigate the interrelation between number of channels and stimulation rate in the continuous interleaved sampling strategy (CIS).
  
  
  METHODS
  Three of the first recipients of the new COMBI 40+ cochlear implant participated in consonant, vowel, number, and sentence tests. Speech understanding was evaluated for different combinations of number of active channels from two to twelve and stimulation rate per channel between 1,515 and 9,090 pulses per second.
  
  
  RESULTS
  The results indicate that the optimum number of active channels is not necessarily the maximum number of usable channels.
authors.affiliation: Institute for Advanced Physics, University of Innsbruck, Austria.
authors.forename: S M
authors.initials: SM
authors.lastname: Brill
authors.forename: W
authors.initials: W
authors.lastname: Gstöttner
authors.forename: J
authors.initials: J
authors.lastname: Helms
authors.forename: C
authors.initials: C
authors.lastname: von Ilberg
authors.forename: W
authors.initials: W
authors.lastname: Baumgartner
authors.forename: J
authors.initials: J
authors.lastname: Müller
authors.forename: J
authors.initials: J
authors.lastname: Kiefer
mesh_terms: D000328:Adult; D000368:Aged; D019929:Cochlear Implantation; D003638:Deafness / Q000601:surgery*; D004558:Electric Stimulation / Q000295:instrumentation; D004867:Equipment Design; D006801:Humans; D008875:Middle Aged; D013063:Speech Discrimination Tests; D013067:Speech Perception