• Users Online: 405
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Search Ahead of print Current issue Archives Submit article Instructions Subscribe Contacts Login 
Year : 2015  |  Volume : 31  |  Issue : 1  |  Page : 36-41

Improvement of cochlear implant performance: changes in dynamic range

1 Audiology Unit, Departments of ENT, Faculty of Medicine, Zagazig University, Zagazig, Egypt
2 Cairo University, Cairo, Egypt

Correspondence Address:
Ahmed Khater
Department of ENT, Faculty of Medicine, Zagazig University, Zagazig
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1012-5574.152706

Rights and Permissions

Context Theoretically, a wide input dynamic range (IDR) will capture more of the incoming acoustic signal than a narrow IDR, allowing the cochlear implant (CI) user to hear soft, medium, and loud sound. A narrow IDR may restrict the CI user's ability to hear soft speech and sound because less of the incoming acoustic signal is being mapped into the CI user's electrical dynamic range. Aim The overall goal of the study is to provide guidelines for audiologists to efficiently and effectively optimize performance of CI recipients for two difficult listening situations: understanding soft speech and speech in noise. Settings and design Two variables were studied; the independent variables were IDR and the electric dynamic range of the channels. The dependent variables were six Ling sounds, monosyllabic word test, and speech in noise test. Materials and methods Fourteen patients participated in the study. For each patient, seven programs were created. In each program, dependent variables were assessed in different independent ones. Results A restricted IDR resulted in poor speech recognition compared with the relatively wide IDR. Subjectively determined T level and most comfortable level (MCL) at the most, not the maximum, comfortable level appears to have a positive effect on both soft sound recognition and speech discrimination. Conclusion Dynamic range is an important factor -among others- to improve the ability of CI users to understand soft speech as well as speech in noise.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded249    
    Comments [Add]    
    Cited by others 1    

Recommend this journal