NCA photo 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.

Parsa, V & Jamieson, DG (2003) Adaptive modeling of compression hearing aids: Convergence and tracking issues, 146th Meeting of the Acoustical Society of America, Austin, USA, November.

 

Other NCA labs include

Anechoic Chamber Assistive Devices | Child Amplification |
Child Hearing Research | Digital Signal Processing | Speech Communication | Electrophysiology | Hearing Research Clinic | Hearing Science  | Robert B. Johnston Aural Rehabilitations

NCA Director Prudence Allen

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