National Centre for Audiology

Digital Signal Processing Laboratory

Research Overview

The DSP and Electroacoustics Laboratory (DEAL) is a multi-disciplinary funded laboratory for applied signal processing research.  Current research projects include electroacoustic and behavioural assessment of DSP algorithms in hearing aids, realtime DSP algorithm development, and development of “App”s for Audiology and Speech Language Pathology. 

In more detail, a central focus of the research in DEAL has been on speech quality evaluation and estimation, which is an important topic in telecommunications, Audiology, and Speech Pathology.  For example, speech quality measurements are used to benchmark the performance of speech coding, noise reduction and echo suppression algorithms in telecommunications. Similarly, speech quality is an important factor in users' acceptance of and satisfaction with hearing aids and assistive listening devices. Likewise, speech quality measures are useful in quantifying the severity of a speech/voice disorder and in monitoring therapy progress. The long-term goal of this line of research is to develop and disseminate speech quality assessment tools that will allow efficient design and evaluation of communication and hearing devices, and assist in therapeutic management of speech disorders.


Connect with Us


Vijay Parsa, PhD, is the director of the Digital Signal Processing and Electroacoustics Laboratory. Dr. Parsa is an Associate Professor, jointly appointed between the Faculties of Health Sciences and Engineering. His research interests are in speech and audio signal processing, with a particular focus on subjective and objective assessment of speech quality. 
t. 519-661-2111 x 88947