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Rigshospitalet - a part of Copenhagen University Hospital
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Complex-Tone Pitch Discrimination in Listeners With Sensorineural Hearing Loss

Research output: Contribution to journalJournal articleResearchpeer-review

DOI

  1. Adaptive Processes in Hearing

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Temporal Fine-Structure Coding and Lateralized Speech Perception in Normal-Hearing and Hearing-Impaired Listeners

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Individual Hearing Loss: Characterization, Modelling, Compensation Strategies

    Research output: Contribution to journalJournal articleResearchpeer-review

  • Federica Bianchi
  • Michal Fereczkowski
  • Johannes Zaar
  • Sébastien Santurette
  • Torsten Dau
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Physiological studies have shown that noise-induced sensorineural hearing loss (SNHL) enhances the amplitude of envelope coding in auditory-nerve fibers. As pitch coding of unresolved complex tones is assumed to rely on temporal envelope coding mechanisms, this study investigated pitch-discrimination performance in listeners with SNHL. Pitch-discrimination thresholds were obtained for 14 normal-hearing (NH) and 10 hearing-impaired (HI) listeners for sine-phase (SP) and random-phase (RP) complex tones. When all harmonics were unresolved, the HI listeners performed, on average, worse than NH listeners in the RP condition but similarly to NH listeners in the SP condition. The increase in pitch-discrimination performance for the SP relative to the RP condition (F0DL ratio) was significantly larger in the HI as compared with the NH listeners. Cochlear compression and auditory-filter bandwidths were estimated in the same listeners. The estimated reduction of cochlear compression was significantly correlated with the increase in the F0DL ratio, while no correlation was found with filter bandwidth. The effects of degraded frequency selectivity and loss of compression were considered in a simplified peripheral model as potential factors in envelope enhancement. The model revealed that reducing cochlear compression significantly enhanced the envelope of an unresolved SP complex tone, while not affecting the envelope of a RP complex tone. This envelope enhancement in the SP condition was significantly correlated with the increased pitch-discrimination performance for the SP relative to the RP condition in the HI listeners.

Original languageEnglish
JournalTrends in hearing
Volume20
ISSN2331-2165
DOIs
Publication statusPublished - 7 Sep 2016
Externally publishedYes

    Research areas

  • Journal Article

ID: 49776738