Tinnitus and Normal Hearing: A Study on Contralateral Acoustic Reflex Purpose The aim of this study was to evaluate the difference of the contralateral acoustic reflex (AR) threshold between adult subjects with hearing within clinically normal limits, with and without tinnitus. Method The study sample in this exploratory, descriptive, and comparative study comprised 40 female subjects who were ... Research Article
Research Article  |   December 01, 2013
Tinnitus and Normal Hearing: A Study on Contralateral Acoustic Reflex
 
Author Affiliations & Notes
  • Luciene da Cruz Fernandes
    Bahia State University, Bahia, Brazil
  • Teresa Maria Momensohn-Santos
    Catholic University of São Paulo, São Paulo, Brazil
  • Josiane Silva Martins Carvalho
    Jorge Amado University Center, Bahia, Brazil
  • Fernando Luís de Queiroz Carvalho
    Bahia State University, Bahia, Brazil
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication.×
  • Correspondence to Luciene da Cruz Fernandes: luenefernandes@gmail.com
  • Editor: Larry Humes
    Editor: Larry Humes×
Article Information
Hearing & Speech Perception / Hearing Disorders / Research Articles
Research Article   |   December 01, 2013
Tinnitus and Normal Hearing: A Study on Contralateral Acoustic Reflex
American Journal of Audiology, December 2013, Vol. 22, 291-296. doi:10.1044/1059-0889(2013/13-0005)
History: Received January 14, 2013 , Revised March 8, 2013
 
American Journal of Audiology, December 2013, Vol. 22, 291-296. doi:10.1044/1059-0889(2013/13-0005)
History: Received January 14, 2013; Revised March 8, 2013

Purpose The aim of this study was to evaluate the difference of the contralateral acoustic reflex (AR) threshold between adult subjects with hearing within clinically normal limits, with and without tinnitus.

Method The study sample in this exploratory, descriptive, and comparative study comprised 40 female subjects who were evaluated: 20 had tinnitus and 20 formed the control group. The contralateral AR threshold was evaluated at the frequencies of 500, 1000, and 2000 Hz.

Results Elevated or absent AR thresholds were found only in subjects with complaints of tinnitus. At all frequencies and in either ear, the median AR threshold was higher in the group that complained of tinnitus (100.0 dB; range = 95.0–100.0 dB) compared with the control group (90.0 dB; range = 86.3–95.0 dB; p < .01). There was a statistically significant difference (p < .05) in the group with tinnitus, in each of the frequencies studied and in both the right and left ear.

Conclusion The results suggest that evaluation of the efferent system, through AR, could be an important tool for the differential diagnosis of tinnitus in patients whose hearing was within clinically normal limits.

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