The 107th AES Convention Review
John Vanderkooy and Stanley Lipshitz are back once again to give us a review of the papers presented at the AES convention, this year held in New York. For those who couldn't attend the convention, this is an excellent opportunity to get an overview of the papers presented in an informative and digestible format by John and Stanley.
JOHN VANDERKOOY - Audio Research Group, University of WaterlooJohn Vanderkooy was born in The Netherlands in 1941, but received all of his education in Canada, with a B. Eng. degree in engineering physics in 1963 and Ph.D. in physics in 1967, both from McMaster University in Hamilton, Ontario. For some years he followed his doctoral interests in low- temperature physics of metals at the University of Waterloo, where he is currently a professor of physics. However, since the late 1970s, his research interests have been mainly in audio and electroacoustics.
A fellow of the AES and a member of the IEEE, Dr. Vanderkooy has contributed a variety of papers at conventions and to the Journal. Together with his colleague Stanley Lipshitz and a number of graduate and undergraduate students, they formed the Audio Research Group at the University of Waterloo.
Dr. Vanderkooy's current interests are digital audio signal processing, measurement of transfer functions with maximum-length sequences, transducers, diffraction of loudspeaker cabinet edges, and most recently sub-surface analysis techniques using maximum-length sequences.
STANLEY LIPSHITZ - Audio Research Group, University of WaterlooStanley P. Lipshitz is a professor in both the departments of Applied Mathematics and Physics at the University of Waterloo, Ontario, Canada. In addition to the usual teaching duties associated with a university position, he conducts his own research and supervises graduate student research in audio and electroacoustics as a member of the university's Audio Research Group.
Prior to joining the faculty of the University of Waterloo in 1970, he studied in South Africa, the country of his birth and where he received his Bachelors (1964), Masters (1966) and Ph.D. (1970) degrees in applied mathematics. He is now a Canadian citizen.
Dr. Lipshitz is a fellow of the Audio Engineering Society, and served as a governor for the periods 1984- 1986, 1987-1992, and as its President for the year 1988-1989. He is a member of the Review Board of the Society's Journal, and serves on the Publications Policy Committee. Other society memberships include the IEEE, the Acoustical Society of America, and the Canadian Acoustical Association. He is also vice-president and recording engineer of the Kitchener-Waterloo Chamber Music Society.
He has presented numerous technical papers at AES Conventions, both in North America and overseas, on a wide range of topics including amplifier design, psychoacoustics, loudspeaker crossover design, electro-acoustic transducer measurement techniques, acoustics, and digital signal processing for audio.
Dr. Lipshitz has participated in many educational workshops and seminars on various aspects of audio including loudspeaker measurement, stereo microphone techniques, and the fundamentals of digital audio. His is published frequently in the AES Journal and many other audio related journals.
His current research interests include transducer design and measurement, digital signal processing for audio including the mathematical theory of dithered quantizers and noise shapers, the calculation of acoustic diffraction, adaptive room deconvolution, and the characterization and design of surround-sound systems. He has consulted for a number of companies on audio-related matters.
In October 1993, Dr. Lipshitz received the AES Silver Medal Award for his research contributions to audio.