title: Comparison of the fine structure processing (FSP) strategy and the CIS strategy used in the MED-EL cochlear implant system: speech intelligibility and music sound quality.
abstract: OBJECTIVE
  The aim of the present study was to evaluate MED-EL's Fine Structure Processing (FSP) strategy in comparison with their variations of the standard Continuous Interleaved Sampling (CIS) strategy denoted CIS+ and High Definition CIS (HDCIS).
  
  
  METHODS
  Twenty experienced adult CI users participated in the study in connection with upgrading to a new speech processor and at a two-year follow-up.
  
  
  METHODS
  Blinded paired-comparisons between FSP and HDCIS were performed for speech intelligibility and music sound quality. Standard speech recognition tests in quiet and in noise were also accomplished to monitor the participants' actual performance and to evaluate long-term outcomes.
  
  
  RESULTS
  Overall, the paired-comparison results showed no significant differences between the strategies, however, the total numbers of significant individual preferences were: 11 FSP vs. 12 HDCIS for speech, and 4 FSP vs. 15 HDCIS for music. The average speech recognition score decreased significantly after one month with FSP, but after two years there were no significant difference compared to the initial results with CIS+.
  
  
  CONCLUSIONS
  Owing to the large individual differences in subjective preference, and the fact that the FSP strategy was not superior to the CIS variations, the recipients should be given the opportunity of choosing between the strategies
authors.affiliation: Department of Audiology, Sahlgrenska University Hospital, and Institute of Neuroscience and Physiology, University of Gothenburg, Sweden. lennart.magnusson@neuro.gu.se
authors.forename: Lennart
authors.initials: L
authors.lastname: Magnusson
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D001302:Audiometry, Speech; D001307:Auditory Perception; D001309:Auditory Threshold; D019929:Cochlear Implantation / Q000295:instrumentation*; D003054:Cochlear Implants; D012048:Correction of Hearing Impairment / Q000523:psychology; D005260:Female; D034381:Hearing Loss / Q000523:psychology / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009146:Music; D009622:Noise / Q000009:adverse effects; D057240:Patient Preference; D010470:Perceptual Masking; D019986:Persons with Hearing Disabilities / Q000523:psychology / Q000534:rehabilitation*; D011474:Prosthesis Design; D017603:Signal Detection, Psychological; D012815:Signal Processing, Computer-Assisted; D013065:Speech Intelligibility; D013997:Time Factors