Vowel Production in Persian Deaf Children with Cochlear Implant: is the Age of Implantation an Important Factor?

  • Peyman Zamani
  • Amir Rahmanirasa
  • Farzad Weisi
  • Ayub Valadbeigi
  • Farhad Farahani
  • Mohammad Rezaei
Original Article


Proper production of vowels has great significance in speech intelligibility. Evidence shows that cochlear implantation has a significant impact on language and reading abilities in some children immediately after the surgery. The aim of the present study is comparing the quality of 6 simple Persian vowels between two groups of cochlear-implanted children under and over 2 years old. This was a cross-sectional analytic study conducted on 70 children who were implanted under the age of 2, 70 children who were implanted over the age of 2 and 238 normal children as control group. For data analysis, the SFS win acoustic analysis was used. Result of this study showed that F2/i/, f1/e/, f2/e/, f2/∞/, f1/a/, F2/a/, f1/o/, F2/o/and F2/u/means had significant difference between three groups (P < 0.05). Children implanted under the age of 2 showed similar performance as normal children in vowel production. Early cochlear implantation (under the age of 2) affects the quality of simple Persian vowel production significantly as well as the increase of speech intelligibility.


Vowel production Deaf children Cochlear implantation 



The authors wish to thank Hossein Rezaei for his help in editing the English language in our article. Also we are very grateful to the children who took part in this study. The research was supported by University of social welfare and rehabilitation sciences.

Conflict of interest

The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.


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Copyright information

© Association of Otolaryngologists of India 2014

Authors and Affiliations

  • Peyman Zamani
    • 1
  • Amir Rahmanirasa
    • 2
  • Farzad Weisi
    • 4
  • Ayub Valadbeigi
    • 4
  • Farhad Farahani
    • 3
  • Mohammad Rezaei
    • 2
  1. 1.Musculoskeletal Rehabilitation Research CenterAhvaz Jundishapur University of Medical SciencesAhvazIran
  2. 2.Faculty of Rehabilitation SciencesHamadan University of Medical Sciences & Health ServicesHamadanIran
  3. 3.Faculty of Medical SciencesHamadan University of Medical Sciences & Health ServicesHamadanIran
  4. 4.Iran University of Medical Science & Health ServicesTehranIran

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