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Home | Seminars and Symposia | Past seminars/symposia: Thursday, November 20, 2014

DTC Seminar Series

Reduction of Audible Noise and Enhancement of Speech; Real-time Algorithms and Applications


Issa M.S. Panahi
Department of Electrical Engineering
University of Texas at Dallas

Thursday, November 20, 2014
5:00 p.m. reception
5:30 p.m. seminar

401/402 Walter Library

Issa M.S. Panahi

Active control of acoustic noise and enhancement of desired audio signal, such as speech or music, have been of significant interest to researchers for various commercial, biomedical, and military applications for many years. Rapid advancement of digital technology and powerful signal processing techniques are offering new opportunities to explore and search for cost-effective and practical system realization and efficient implementation of adaptive active noise control (ANC) and speech enhancement (SE) algorithms in real time. In this presentation, we review some architectures and adaptive signal processing algorithms for real-time implementation of ANC and SE methods. We consider the cost-effective “feedback” ANC method which does not require reference sensors (or microphones) and is suitable for scenarios dealing with distributed noise, the impact of noise characteristics and decomposition on the performance of single and parallel realization of ANC and feedback ANC systems, and the possibility of using directional ultrasonic loudspeakers for controlling the noise remotely. We also give a brief review of signal processing based algorithms for reducing the background noise and enhancing the quality and intelligibility of speech signals in general, and for improving the performance of signal processing pipeline of hearing aid devices in particular.


Issa M.S. Panahi received his Ph.D degree in electrical engineering from the University of Colorado at Boulder, Boulder, Colorado, in 1988. He worked on signal processing and control research and development projects in industry for over 20 years before joining the University of Texas at Dallas (UTD) in 2001. He was a senior design engineer for a vision-controlled industrial robot at the Storage Technology Inc. in Colorado (1985-1988), and a research scientist at the Bellaire Research Center of Shell Oil Development Company in Houston (188-1991). In 1991, he joined the digital signal processing (DSP) division of Texas Instruments Inc (TI) where he founded and directed the worldwide DSP Embedded Systems business unit and served as a chief DSP architecture, senior member of technical staff, worldwide application manager, chief technology officer, and advance systems development manager for the business unit until 2000. From 2000 to 2001, he was a Wireless application manager at TI in Dallas. In 2001, Dr. Panahi joined UTD where he is currently an Associate Professor in the department of electrical engineering, and also a research associate professor in the department of bioengineering. The research areas of Dr. Panahi is audio/acoustic/speech signal processing with emphasis on active noise control, speech enhancement, psychoacoustic modelling, adaptive filtering, virtual/remote sensing, and microphone/ loudspeaker arrays. Dr. Panahi holds a US patent and has published 5 TI’s books on Active Noise Control and DSP-Controller devices. He has published over 130 technical articles, journals, and conferences papers. A journal paper of Dr. Panahi was awarded as the best paper of 2013 by the Electronics and Telecommunication Research Institute (ETRI) of S. Korea. Dr. Panahi is a senior member of IEEE. He was founder and Vice-chair of the IEEE-Dallas Chapter of Engineering in Medicine and Biology Society (EMBS). He has been vice-chair and chair of the IEEE-Dallas Chapter of Signal Processing Society since 2004. Dr. Panahi is recipient of the 2005 and 2011 “Outstanding Service Award” from the IEEE-Section. Since 2009, he has been associate editor, co-organizer and chair of the ICA/PCA tracks and its invited sessions for the biomedical signal processing theme at the IEEE EMBCs . He was a member of organizing committee and chair of plenary sessions of the IEEE ICASSP-2010. He also organized and chaired several invited sessions at IEEE APE, American Control Conference (ACC), International Federation of Automatic Control-World Congress (IFAC), and IEEE International Conference on Fuzzy Systems.