The Digital
Signal Processing Laboratory at the National
Centre for Audiology (NCA), conducts research in acoustic signal
processing with applications in Audiology and Speech Language
Pathology.
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Digital Signal Processing Laboratory Publications
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Book chapter
1.
Chen, G. & Parsa, V. Objective Speech Quality Evaluation Using an Adaptive
Neuro-Fuzzy Network. Book chapter in "Speech, Audio,
Image and Biomedical Signal Processing using Neural
Networks" edited by S.R.M. Prasanna and Prasad, Springer-Verlag,
Germany, 2007.
Refereed journal papers
1.
Chen, G. & Parsa, V. (2007). Loudness pattern based speech quality
evaluation using Bayesian modeling and Markov chain Monte
Carlo methods, Journal of the Acoustical Society of
America, 121, EL77 - 83.
2.
Bromwich, M., Parnes, L., Parsa, V., and Yoo. J. (2007, in press).
Active Noise Reduction Audiometry - A prospective analysis
of a new approach to noise management in audiometric
testing, Laryngoscope.
3.
Umapathy, K., Krishnan, S, Parsa, V & Jamieson, DG (2005).
Discrimination of pathological voices using a time-frequency
approach, IEEE Transactions on Biomedical Engineering,
52, 421-430.
4.
Chen, G & Parsa, V (2005). Non-intrusive speech quality evaluation
using an adaptive neuro-fuzzy inference system, IEEE
Signal Processing Letters, 12, 403-406.
5.
Chen, G & Parsa, V (2004) Output-based speech quality evaluation by
measuring perceptual spectral density distribution, IEE
Electronics Letters, 40, 783-785.
6.
Parsa, V & Jamieson, DG (2003) Interactions between speech coders and
disordered speech, Journal of Speech Communication, 40,
365-385.
7.
Jamieson, DG, Parsa, V, Price, M & Till, J (2002) Interaction of speech
coders and atypical speech, II - Effects on speech
quality, Journal of Speech, Language and Hearing
Research, 45, 569-580.
8.
Jamieson, DG, Parsa, V, Price, M & Till, J (2002). Interaction of speech
coders and atypical speech, I: Effects on speech
intelligibility, Journal of Speech, Language and Hearing
Research, 45, 482-493.
Refereed conference papers
1.
Chen, G., Parsa, V., & Scollie, S. (2006). An ERB Loudness Pattern
Based Objective Speech Quality
Measure. Proceedings of the International Conference on
Spoken Language Processing, 2174 – 2177, Pittsburgh,
USA, September
2.
Chen, G., & Parsa, V. (2006). An Improved Affine Projection Algorithm Based
Crosstalk Resistant Adaptive Noise Canceller. Proceedings
of the International Conference on Spoken Language
Processing, 2138 – 2141, Pittsburgh, US, September.
3.
Parsa, V., & Chen. G. (2006). A Bayesian Estimator for Non-intrusive
Speech Quality Evaluation in Psychoacoustic Domain.
Proceedings of the IEEE International Symposium on Signal
Processing and Information Technology, 438 – 441,
Vancouver, Canada, August.
Winner
of the best paper award.
4.
Chen, G. & Parsa, V (2005). Bayesian model based non-intrusive speech
quality evaluation. Proceedings of the IEEE International
Conference on Acoustics, Speech, and Signal Processing,
I-385 – I-388, Philadelphia, USA, March.
5.
Wirtzfeld, M. & Parsa, V (2005) On subband adaptive modeling of compression
hearing aids. Proceedings of the IEEE International
Conference on Acoustics, Speech, and Signal Processing,
III-45 – III-48, Philadelphia, USA, March.
6.
Chen, G & Parsa, V (2004) Neuro-fuzzy estimator of speech quality,
International Conference on Signal Processing and
Communications (SPCOM), IEEE Signal Processing Society,
587 – 591, Bangalore, India, December.
7.
Chen, G & Parsa, V (2004) HMM-based frequency bandwidth extension for speech
enhancement using line spectral frequencies.
Proceedings of the IEEE International Conference on
Acoustics, Speech, and Signal Processing, 709-712,
Montreal, Canada, May.
8.
Umapathy, K & Parsa, V (Oct 2003) Objective evaluation of noise reduction
algorithms in speech applications, Paper #Z6-2, 115th
Audio Engineering Society Convention, New York,
USA, October.
9.
Umapathy, K, Krishnan, S, Parsa, V & Jamieson, D (2002) Time-frequency
modeling and classification of pathological voices.
Proceedings of the IEEE EMBS/BMES Conference, 116-117,
Houston, USA, October.
10.
Parsa, V & Jamieson, DG (2002) Interaction of voice over internet protocol
speech coders and disordered speech samples, Proceedings
of the International Conference on Spoken Language
Processing, 1869-1872, Denver, USA, September.
11.
Parsa, V, Jamieson, DG, Stenning, K & Leeper, HA (2002) On the
estimation of signal-to-noise ratio in continuous speech for
abnormal voices, Proceedings of the International
Conference on Spoken Language Processing, 2505-2508,
Denver, USA, September.
Other publications & presentations
1.
Parsa, V. (2006). Acoustic feedback and its reduction through digital
signal processing, The Hearing Journal, 59, 16-23. Invited
contribution.
2.
Parsa, V. (2006). Evaluation of digital noise reduction algorithms in
hearing aids. Annual meeting of the Canadian
Academy of Audiology, Calgary, Alberta. Invited
presentation.
3.
Wirtzfeld, M. & Parsa, V. (2006). Speech Quality Evaluation of
Feedback Cancellation Algorithms in Digital Hearing Aids.
International Hearing Aid Conference (IHCON), Lake
Tahoe, USA, August.
4.
Chen, Z, Rodrigo, R, Parsa, V & Samarabandu, J (2005). Using
Ultrasonic and Vision Sensors within Extended Kalman Filter
for Robot Navigation, Canadian Acoustics, 33,3,
28 – 29.
5.
Wirtzfeld, M. & Parsa, V. (2005). Subband Adaptive Modeling of Digital
Hearing Aids. Canadian Acoustics, 33, 3, 38
–39.
6.
Singh, G,Parsa, V, Umapathy, K & Chen, G (2004) A comparative evaluation of
single-microphone noise reduction algorithms, International
Hearing Aid Research Conference (IHCON), Lake Tahoe, USA,
August.
7.
Parsa, V, Singh, G, Chen, G & Umapathy, K (2004). Objective
and subjective evaluation of noise reduction algorithms for
hearing aids, Proceedings of the Canadian Acoustics
Association’s annual meeting, 72 – 73, Ottawa, ON, October.
8.
Hodgetts, WE, Chen, G & Parsa, V (2004). Advanced measures of bone
anchored hearing aids: Do they correlated with perceptual
judgments, Proceedings of the Canadian Acoustics
Association’s annual meeting, 74 – 75, Ottawa, ON, October.
Winner of the best student paper award.
9.
Parsa, V & Umapathy, K (2003) Evaluation of noise reduction techniques for
digital hearing aids. 146th Meeting of the Acoustical
Society of America, Austin, USA, November.
Other NCA labs include
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Contact

Dr. Prudence Allen
Director of the National
Centre for Audiology
Phone: (519) 661-3901
Fax: (519) 661-3805 or pallen@uwo.ca