LANGUAGE IN INDIA

Strength for Today and Bright Hope for Tomorrow

Volume 13:6 June 2013
ISSN 1930-2940

Managing Editor: M. S. Thirumalai, Ph.D.
Editors: B. Mallikarjun, Ph.D.
         Sam Mohanlal, Ph.D.
         B. A. Sharada, Ph.D.
         A. R. Fatihi, Ph.D.
         Lakhan Gusain, Ph.D.
         Jennifer Marie Bayer, Ph.D.
         S. M. Ravichandran, Ph.D.
         G. Baskaran, Ph.D.
         L. Ramamoorthy, Ph.D.
Assistant Managing Editor: Swarna Thirumalai, M.A.

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Effect of Bilingualism on Speech in Noise Perception in Young Adults

Ms. Vineetha C.V.
Ms. Suma. R.
Ms. Sudha P Nair

Introduction

Speech perception involves the mapping of speech acoustic signals on to linguistic messages (e.g., phonemes, distinctive features, syllables, words, phrases etc). Although speech is typically well understood under quiet conditions and low task demands, many environmental factors such as noise and reverberation negatively affect speech understanding (Crandell & Smaldino, 2000; Nabelek & Mason, 1981). Both noise and reverberation are present to some degree in the listening environments encountered in everyday life (Helfer & Wilbur, 1990).

Reverberation refers to the persistence of a sound in an enclosed environment. It is measured in reverberation time (RT), the time required for a sound pressure wave of a specific frequency to decay by 60 dB after the signal ceases. Speech perception tends to deteriorate as RT increases (e.g., Moncur & Dirks, 1967; Steinberg, 1929). When noise is present in an acoustic environment, it masks the speech signal by obscuring the less intense portions of the signal (Helfer & Wilbur, 1990).

The result is a reduction in the redundancy of acoustic and linguistic cues in speech, an effect that increases as the signal to noise ratio (SNR) decreases. That is, performance on speech-perception tasks tends to deteriorate as the SNR decreases (e.g., Miller,Heise, & Lichten, 1951).

This is only the beginning part of the article. PLEASE CLICK HERE TO READ THE ARTICLE IN PRINTER-FRIENDLY VERSION.

Ms. Vineetha C .V. (B.Sc. Speech & Hearing)
Corresponding Author
JSS Institute of Speech and Hearing
Mysore 570025
Karnataka
India
cvvineetha@ymail.com

Ms. Suma. R., (MASLP) Guide and Supervisor
Lecturer (Speech Language Pathology)
JSS Institute of Speech and Hearing
Mysore 570025
Karnataka
India
sumaraju.mys@gmail.com

Ms. Sudha P Nair, (M.Sc. Speech and hearing) Guide and Supervisor
Lecturer (Audiology)
JSS Institute of Speech and Hearing
Mysore 570025
Karnataka
India
sudha.pnair1@gmail.com.
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