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WORKSHOP SESSIONS
Saturday, February 19, 1999
Sessions W1-W4

W1:ALTERNATIVE TRANSDUCTION TECHNIQUES; BEYOND MOVING COIL DIRECT RADIATION

Saturday, 19 February, 10:00 h � 12:00 h
Workshop Chair: John Stewart, Principal Engineer,
Harman-Motive, Inc., USA

What advantage can be gained from looking beyond the paradigm of axial pistonic sound reproduction? An eclectic collection of manufacturers and experimenters demonstrate transducers that reproduce sound without axial pistonic motion. A listening experience and a brief tutorial explaining the technologies are provided. This workshop offers a unique opportunity to compare these transducers first hand.

W2:ACOUSTIC TREATMENT OF ASYMMETRICAL PLAYBACK ENVIRONMENTS

Saturday, 19 February, 10:00 h � 12: 00 h
Workshop Chair: Vincent van Haaff, Consultant, USA

Environmental circumstances and the desired function of music studio control rooms may not always allow a strict symmetrical acoustic treatment about a central axis, while common sense would require such geometry. Many engineers and music composers have little choice but to make use of ever smaller spaces to do their work, and are forced to treat these spaces with the minimum loss of actual usable volume and floor space. What are some of the solutions proposed to treat such axially challenging spaces? What constitutes an impossible situation?

W3:MPEG-4 VERSION 2 AUDIO � WHAT IS IT ABOUT?

Saturday, 19 February, 14:00 h � 16:30 h
Workshop Chair: Jürgen Herre, Fraunhofer Institute for Integrated Circuits (FhG-IIS A), Germany

MPEG-4 is the most recent member of the well-known family of ISO/MPEG coding standards, and provides an integrated set of audio coders with attractive capabilities, including bit-rate and bandwidth scalability. After the release of the MPEG-4 standard in 1999, the new Version 2 Standards Addendum, to be published in 2000, defines extended functionalities, such as low delay audio coding, parametric audio coding, error resilience and spatialization. The workshop aims at answering the questions "what is MPEG-4 v2 and what can I do with it?" and includes a number of demonstrations.

MEETING OF THE TECHNICAL COMMITTEE on Transmission and Broadcasting 16:30 - 18:00, following Workshop W3

W4:DESIGN AND MODELING OF LINEAR ARRAY SOUND SYSTEMS

Saturday, 19 February, 14:00 h � 16:30 h
Workshop Chair: Paul D. Bauman, L-Acoustics, France

The recent renaissance of linear arrays for sound reinforcement will be discussed, beginning with an historical overview and followed by a description of the theoretical principles and operating concepts behind a current example of a line array system. Techniques for modeling linear arrays will be discussed along with challenges involved in simulation and measurement. It is hoped that a technical tour of an installation at the Palais de Congr�s will provide a demonstration of system performance and allow for the comparison of simulated versus in-situ measurement results.


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