Effect of stimulus polarity on speech evoked auditory brainstem response

  • Kaushlendra Kumar Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka, India.
  • Jayashree S. Bhat Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka, India.
  • Pearl Edna D’Costa Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka, India.
  • Manav Srivastava Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka, India.
  • Mohan Kumar Kalaiah | mohan.kumark@manipal.edu Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka, India.

Abstract

The aim of the present study was to investigate the effect of stimulus polarity on speech evoked auditory brainstem response (ABR). In order to accomplish it, speech evoked ABR was recorded with various stimulus polarities from 17 normally hearing adults. The result of the study shows differential effect of stimulus polarity on components of speech evoked ABR. Latency of peaks for onset, sustained and offset responses of speech evoked ABR were found to be not significantly different across stimulus polarities. In contrast, the amplitude of first formant and high frequency components was found to be significantly reduced for alternating polarity compared to single polarity, while amplitude of fundamental frequency response was not affected by polarity of the stimuli. Thus speech evoked ABR may be recorded using single polarity rather than using alternating polarities.

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Author Biographies

Kaushlendra Kumar, Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka

Assistant Professor

 

Jayashree S. Bhat, Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka

Professor and Head

 

Pearl Edna D’Costa, Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka
Audiologist
Mohan Kumar Kalaiah, Department of Audiology and Speech Language Pathology, Kasturba Medical College (Manipal University), Mangalore, Karanataka

Assistant Professor

 

Published
2014-01-03
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Original Articles
Keywords:
speech evoked auditory brainstem response, frequency following response, polarity.
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How to Cite
Kumar, K., Bhat, J. S., D’Costa, P. E., Srivastava, M., & Kalaiah, M. K. (2014). Effect of stimulus polarity on speech evoked auditory brainstem response. Audiology Research, 3(1), e8. https://doi.org/10.4081/audiores.2013.e8