Dr. T. Jayakumar

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Dr. T. Jayakumar

Associate Professor in Speech Sciences, Department of Speech Language Sciences

Phone Office: 2253

Thirunavukkarasu Jayakumar is an Associate Professor in the area of Speech Sciences. His research interests are on speech production and speech perception in humans using perceptual and objective methods. He has focused interest in voice assessment and management in individuals with professional voice user and voice disorders. His research interest also extents to Event related potentials (ERP) of Speech and language, Speaker verification/identification and Genomic analysis for communication disorders.
His doctoral research was on investigating voice & speech characteristics in monozygotic and dizygotic twins, who were categorized based on DNA fingerprint. He has analytical experience in various research tools / software for speech and voice assessment. He completed his master and doctorate in Speech language pathology at AII India Institute of Speech and Hearing, University of Mysore.
Presently, Dr. T. Jayakumar is working on projects and guiding PhD. candidates in the area of voice science related issues in neuro-typical individuals and individuals with voice disorders. Over 37 master thesis guided and 6 Ph.D dissertations are under his supervision. He has PhD. guideship for Speech-language pathology and Linguistics under University of Mysore.

SCIENTIFIC PAPERS PUBLISHED IN INTERNATIONAL JOURNALS

Jayakumar T., Amrutha, K., Ranjitha KBN & Sanjeev T. S. (2022). A Preliminary Study on the Effect of Bhramari Pranayama on Voice of Prospective Singers. Journal of voice (In Press) DOI: https://doi.org/10.1016/j.jvoice.2022.05.010
Jayakumar T., Jesnu Jose Benoy (2022). Validation of Acoustic Breathiness Index (ABI) in the South Indian Population. Journal of voice (In Press) DOI: https://doi.org/10.1016/j.jvoice.2022.05.006
Jayakumar T., Jesnu Jose Benoy (2022). Acoustic Voice Quality Index (AVQI) in the Measurement of Voice Quality: A Systematic Review and Meta-Analysis. Journal of voice (In Press). https://doi.org/10.1016/j.jvoice.2022.03.018
Jayakumar T., R. Rajasudhakar & Jesnu Jose Benoy (2022). Comparison and Validation of Acoustic Voice Quality Index Version 2 and Version 3 among South Indian Population Journal of voice (In Press). https://doi.org/10.1016/j.jvoice.2022.02.019
Amrutha, K., Sanjeev T. S., & Jayakumar T. (2021). A Critical Review of Swara (Voice) in Ayurveda, Journal of Ayurveda Medical Sciences, 4(2) page - 475-479. https://doi.org/10.5530/jams.2019.4.6
Jayakumar, T., JJ Benoy & HM Yasin (2020). Effect of Age and Gender on Acoustic Voice Quality Index Across Lifespan: A Cross-sectional Study in Indian Population, Journal of Voice, (In press). https://doi.org/10.1016/j.jvoice.2020.05.025
Jayakumar, T., & HM Yasin (2019). A Preliminary Exploration of Vocal Usage in Prospective Professional Voice Users (PPVUs): Students of the Alimah Course, Journal of Voice, Volume 35, Issue 4, Pages 659.e25-659.e33. https://doi.org/10.1016/j.jvoice.2019.11.012
Jayakumar, T., & Savithri, S. R. (2012). Effect of geographical and ethical variation in Dysphonia severity index: A normative study in Indian population, Journal of Voice, 26 (1) e11-e16. https://doi.org/10.1016/j.jvoice.2020.05.025

SCIENTIFIC PAERS PUBLISHED IN NATIONAL JOURNALS

Yeshoda, K., Jayakumar, T., (2019). A Survey of Prevalence of Voice Problems in School Teachers of Mysuru, India, Journal of the All India Institute of Speech and Hearing, 37, 01, 2019
Amrutha, K., Sanjeev T. S., & Jayakumar T. (2017). Effect of pranayama on dimensions of health. Indian journal of ancient medicine and yoga, 10(2), 49-52.
Yeshoda, K., Rajasudhakar, R., Jayakumar, T., Amoolya, G., & Deepthi D. (2013). Investigation of voice characteristics in special educators using Dysphonia severity Index (DSI) Journal of the All India Institute of Speech and Hearing, 32, 63-70.
Jayakumar, T., & Savithri, S. R. (2010). Respiratory similarity in Monozygotic Twins, Journal of the All India Institute of Speech and Hearing, 29 (1), 73-80.
Savithri, S. R., Sreedevi, N., Jayakumar, T., & Kavya V. (2009). Development of speech rhythm in children Journal of the All India Institute of Speech and Hearing, 29 (2), 175-180.
Jayakumar, T., & Savithri, S. R. (2009). Assessment of Voice Quality in Monozygotic Twins: Qualitative and Quantitative Measures, Journal of the All India Institute of Speech and Hearing, 28, 9- 16.
Jayakumar, T., & Savithri, S. R. (2008). Investigation into voice source of monozygotic twins using formant based inverse filtering. Journal of the All India Institute of Speech and Hearing, 27, 8- 14.

SCIENTIFIC PAERS PUBLISHED IN PROCEEDINGS

Appas Saha, Sam Publius A. & Jayakumar T. (2016) Voice Range And Voice Quality Between Indian Western Singers And African Origin Western Singers. Proceedings of International Symposium Frontiers of Research on Speech and Music, kolkata, India
Saryu Sharma, Juhi Kidwai & Jayakumar T. (2014) Speech characteristics in ventriloquism Proceedings of International Symposium Frontiers of Research on Speech and Music, Mysore, India.
Jayakumar, T., Vijayakumar N. & Pragati R. (2012). Categorical perception of Voice onset time and F2 Continuum by Kannada and Malayalam speaking Individuals, Proceeding of Speech synthesis and its applications, 2-3, karyavattom, India.
Jayakumar, T., Geetha Y. V., Vijayakumar N. & Lincy, M. V. (2012). Auditory Processing in stuttering: Using Complex Non-linguistic Stimulus, Proceeding of Frontiers of Research on Speech and Music, Gurgoan, India.
Merlin, T., Pankaja, K. R. & Jayakumar. T. (2012). Effect of Fundamental and Formant Frequency on Listener’s Judgment of Speaker Size, Masculinity and Attractiveness in Indian context, Proceeding of Frontiers of Research on Speech and Music, Gurgoan, India.
Jayakumar, T., & Savithri, S. R. (2007). Acoustic vowel Space and Speaking rate in monozygotic twins: Preliminary Investigation. Proceeding of National Symposium on Acoustics. 136-138. Thruchankodu.
Jayakumar, T. (2007). Phonatory Stability of Voice in Children. Proceeding of Frontiers of Research on Speech and Music, 85-88, Mysore, India.
Seema. M., Kalaiselvi.P.S., & Jayakumar, T. (2006). Knowledge about Vocal Hygiene in Singing Students. Proceeding of Frontiers of Research on Speech and Music, 94-97, Lucknow, India.
Kalaiselvi.P. S. Jayakumar, T.,& Seema. M. (2006). Occurrence and Nature of Vocal Symptoms in two groups of Professional Voice users: A Comparative Study. Proceeding of Frontiers of Research on Speech and Music, 132-135, Lucknow, India.
Jayakumar. T., Kalaiselvi.P., & Seema. M. (2006). A Comparative Study of Voice parameters from Live versus Tape Recorded Voice samples. Proceeding of Frontiers of Research on Speech and Music, 124-126, Lucknow, India.
Seema. M., Jayakumar. T., Kalaiselvi.P.S. (2005). The Effect of Speaking Sample Duration on Fundamental Frequency. Proceeding of National Acoustic Symposium, 330-332, Bangalore.
Jayakumar. T., Venugopal M. (2004). Perception of voicing in Tamil and Hindi speakers. Proceedings of the national symposium on Acoustic, Section C, 1-9.

CHAPTERS IN BOOKS

Approaches to elicit true vocal fold vibrations – National Workshop on Voice: Assessment and Management. India, 2008.
Title of the Books: Aural Rehabilitation/Habilitation of Children with Hearing Impairment

Tamil Nadu Open University - M. SEd (HI) Course Book –

Block 3: Introduction to language and theories of Language Acquisition
Block 4: The Speech process and components of speech
Block 5: Speech Teaching (2016)

PROJECTS GRANTED

Extramural Projects

T. Jayakumar & yeshoda K

Effect of cognitive load on speech and voice characteristics : across lifespan: A cross-sectional study

DST-2020 to 2023

Three year

Ongoing

Narne, V.K., T. Jayakumar, & Swapna.N.

Cortical auditory evoked Potentials as a measure of central auditory development in children with Hearing impaired.

DST-2011 to 2014

Three year

Completed

Intermural projects
S.No.	Authors	Title	Funding Source	Duration	Status
1.	Jayakumar T. (2018)	Prevalence and risk factors of Voice problems and effect of voice projection training in Imams	AIISH Research Found-2018	One year	Completed
2.	Jayakumar T. (2018)	Standardization of Linguistic Profile Test (LPT) in Tamil	AIISH Research Found-2018	One year	Completed
3.	K. Rajalakshmi, T. Jayakumar, N. Sreedevi & Srinivas Kovvali	The genetics of sensorineural hearing loss	AIISH Research Found-2017	Two year	Ongoing
4.	Yeshoda K. & Jayakumar T. (2012)	Prevalence of voice disorders in school teachers around Mysore	AIISH Research Found-2012	One year	Completed
5.	Jayakumar T. & Narne, V.K. (2011)	Behavioral correlates of P300 responses - Voice Onset Time (VOT) and place of articulation continuum in Kannada and Hindi speaking individuals.	AIISH Research Found-2011	One year	Completed
6.	Jayakumar T. Narne, V.K & Geetha, Y.V, (2010).	Auditory processing in stutters: using non-linguistic and linguistic Stimulus	AIISH Research Found-2010	One year	Completed
7.	Jayakumar T. & Narne, V.K. (2010)	Neuro-physiological correlates of voice onset time in Kannada and Tamil speaking Individuals using N1 evoked potential	AIISH Research Found-2010	One year	Completed

He has over 12 years of teaching and 14 years of research in the area of speech language pathology

PLACE	POSITION	PERIOD	DURATION
All India Institute of Speech and Hearing (AIISH) University of Mysore (UOM)	Associate Professor in Speech Sciences	Aug 2018 to till date	4 years +
AIISH, UOM	Reader in Speech Sciences	June 2015 to July 2018	3 years
AIISH, UOM	Lecturer in Speech Sciences	May 2010 to June 2015	5 years
AIISH, UOM	Research officer	October 2009 to April 2010	6 months
AIISH, UOM	Senior Speech Pathologist	June 2005 to Aug 2006	1.2 year
AIISH, UOM	Project assistant	June 2002 to May 2003	1 year