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Effect of acoustic features on discrimination ability in individuals with auditory neuropathy spectrum disorder: an electrophysiological and behavioral study

  • Kumari ApekshaEmail author
  • U. Ajith Kumar
Otology
  • 15 Downloads

Abstract

Purpose

The present study aimed to investigate the discrimination ability for acoustic cues in individuals with auditory neuropathy spectrum disorder (ANSD) using both behavioral and neural measures and to compare the result with normal hearing individuals.

Methods

Four naturally produced syllables /ba/, /da/, /ma/ and /pa/ were used to study discrimination skills. They were combined in pairs such that the two syllables differ in acoustic features, that is place (/ba/–/da/), manner (/ba/–/ma/) and voicing (/ba/–/pa/) cues. Thirty individuals with ANSD and 30 individuals with normal hearing sensitivity were the participants. Syllable discrimination skill was assessed using behavioral (reaction time, sensitivity and D-prime) and neural (P300) measures.

Results

There was prolongation in latency and reduction in amplitude of P300 in individuals with ANSD compared to individuals with normal hearing sensitivity. Individuals with ANSD showed better discrimination skill for stimulus pairs differing in the manner followed by place and the least perceived was voicing information.

Conclusion

Discrimination ability of individuals with ANSD is found to be affected as evident on behavioral and neural measures. The discrimination ability varies with acoustic features of speech.

Keywords

Auditory neuropathy spectrum disorder P300 Discrimination skills Acoustic features Scalp topography 

Notes

Acknowledgements

We sincerely thank Director, All India Institute of Speech and Hearing and Head, Department of Audiology. We like to thank all the participants of this study.

Compliance with ethical standards

Conflict of interest

The authors report no conflict of interest and are solely responsible for the content and writing of the paper.

Informed consent

Informed consent was obtained from all individual participants included in the study.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Speech and HearingJSS Institute of Speech and HearingMysoreIndia
  2. 2.Department of AudiologyAll India Institute of Speech and HearingMysoreIndia

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