Paper  |   December 2006
Recognition of Simulated Telephone Speech by Cochlear Implant Users
 
Author Affiliations & Notes
  • Qian-Jie Fu
    House Ear Institute, Los Angeles
  • John J. Galvin, III
    House Ear Institute, Los Angeles
  • Contact author: Qian-Jie Fu, Department of Auditory Implants and Perception, House Ear Institute, 2100 West Third Street, Los Angeles, CA 90057. E-mail: qfu@hei.org.
Article Information
Hearing Aids, Cochlear Implants & Assistive Technology / Speech, Voice & Prosody
Paper   |   December 2006
Recognition of Simulated Telephone Speech by Cochlear Implant Users
American Journal of Audiology, December 2006, Vol. 15, 127-132. doi:10.1044/1059-0889(2006/016)
History: Received April 25, 2006 , Revised August 10, 2006 , Accepted October 3, 2006
 
American Journal of Audiology, December 2006, Vol. 15, 127-132. doi:10.1044/1059-0889(2006/016)
History: Received April 25, 2006; Revised August 10, 2006; Accepted October 3, 2006

Purpose: To evaluate cochlear implant users’ understanding of telephone speech.

Method: Telephone speech was simulated by band-limiting broadband speech stimuli. Multitalker vowel, consonant, and sentence recognition was measured for both simulated telephone speech and broadband speech in 10 postlingually deafened adult cochlear implant users. The study was approved by the St. Vincent’s Hospital institutional review board, and signed, informed consent was obtained from all participants.

Results: There was no significant difference in vowel recognition scores between broadband and telephone speech. However, mean consonant and sentence recognition scores were significantly poorer with telephone speech.

Conclusions: The limited telephone bandwidth significantly reduced cochlear implant users’ understanding of telephone speech. The effect of band-limited speech was highly variable, suggesting that the contribution of high-frequency information to speech recognition varied significantly among the cochlear implant users.

Acknowledgments
This research was supported by National Institutes of Health Grant DC-004993. We would like to thank all of the study participants.
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