Effects of stimulus duration on amplitude modulation processing with cochlear implants

Xin Luo, John J. Galvin, Qian Jie Fu

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

This study investigated temporal integration processes underlying cochlear implant (CI) users' amplitude modulation processing. Thresholds for modulation detection (AMDTs) and modulation frequency discrimination (AMFDTs) were measured for 50-, 100-, and 200-Hz modulation frequencies with stimulus durations from 50 to 400 ms in eight adult CI users. The results showed significant interactions between modulation frequency and stimulus duration for AMDTs and AMFDTs. The data suggest that temporal integration limits CI users' sensitivity to low temporal pitch over short durations, and that temporal integration over longer durations may not enhance CI users' sensitivity to high temporal pitch.

Original languageEnglish (US)
Pages (from-to)EL23-EL29
JournalJournal of the Acoustical Society of America
Volume127
Issue number2
DOIs
StatePublished - Feb 16 2010
Externally publishedYes

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ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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