Combining acoustic and electric stimulation in the service of speech recognition

Michael Dorman, Rene H. Gifford

Research output: Contribution to journalArticlepeer-review

114 Scopus citations


The majority of recently implanted, cochlear implant patients can potentially benefit from a hearing aid in the ear contralateral to the implant. When patients combine electric and acoustic stimulation, word recognition in quiet and sentence recognition in noise increase significantly. Several studies suggest that the acoustic information that leads to the increased level of performance resides mostly in the frequency region of the voice fundamental, e.g. 125 Hz for a male voice. Recent studies suggest that this information aids speech recognition in noise by improving the recognition of lexical boundaries or word onsets. In some noise environments, patients with bilateral implants can achieve similar levels of performance as patients who combine electric and acoustic stimulation. Patients who have undergone hearing preservation surgery, and who have electric stimulation from a cochlear implant and who have low-frequency hearing in both the implanted and not-implanted ears, achieve the best performance in a high noise environment.

Original languageEnglish (US)
Pages (from-to)912-919
Number of pages8
JournalInternational Journal of Audiology
Issue number12
StatePublished - Dec 2010


  • Bilateral cochlear implants
  • Cochlear implants
  • Combined acoustic and electric stimulation

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing


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