J Audiol Otol.  2018 Oct;22(4):197-203. 10.7874/jao.2018.00059.

Dynamics of Speech Perception in the Auditory-Visual Mode: An Empirical Evidence for the Management of Auditory Neuropathy Spectrum Disorders

Affiliations
  • 1Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India. jithinrajb@gmail.com

Abstract

BACKGROUND AND OBJECTIVES
The present study probed into the relative and combined contribution of auditory and visual modalities in the speech perception of individuals with auditory neuropathy spectrum disorders (ANSD). Specifically, the identification scores of consonant-vowel (CV) syllables, visual enhancement (VE), and auditory enhancement in different signal to noise ratios (SNRs) were compared with that of the control group.
SUBJECTS AND METHODS
The study used a repeated measure standard group comparison research design. Two groups of individuals in the age range of 16 to 35 years participated in the study. The clinical group included 35 participants diagnosed as ANSD, while the control group had 35 age and gender matched individuals with typical auditory abilities. The participants were assessed for CV syllable identification in auditory only (A), visual only (V), and auditory-visual (AV) modalities. The syllables were presented in quiet and at 0 dB SNR.
RESULTS
The speech identification score was maximum in AV condition followed by A-condition and least in V condition. This was true in both the groups. The individuals with ANSD were able to make better use of visual cues than the control group, as evident in the VE score.
CONCLUSIONS
The dynamics of speech perception in the AV mode is different between ANSD and control. There is definite benefit of auditory as well as visual cues to individuals with ANSD, suggesting the need to facilitate both the modalities as part of the audiological rehabilitation. Future studies can focus on independently facilitating the two modalities and testing the benefits in the AV mode of speech perception in individuals with ANSD.

Keyword

Speech perception; Auditory rehabilitation; Hearing loss; Noise

MeSH Terms

Cues
Hearing Loss
Noise
Rehabilitation
Research Design
Signal-To-Noise Ratio
Speech Perception*
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