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Interactive Games, Analyzing Loudspeaker Defects, Zones of Quiet…

NEW YORK: “Beyond the Awards, Workshops, Special Events and bustling Exhibition Halls, the exchange of significant technical information remains the backbone of every Audio Engineering Convention,” states 127th AES Convention Chair Agnieszka Roginska. “This mission is exemplified by a robust syllabus of Papers and Posters. AES Papers Committee Co-Chairs Veronique Larcher and Steve Garrett have developed an authoritative program which exemplifies the level of accomplishment achieved by innovators in every sector of our community.”

127th AES Convention Papers Presentations Include an Emphasis on the burgeoning digital game industry. Highlights include:

* The Wii Remote as a Musical Instrument -Technology and Case Studies: Paper by Paul Lehrman — The inexpensive and ubiquitous Remote for the Nintendo Wii game system-known as the “Wiimote”-uses a combination of technologies that are highly suited for music generation and control including position tracking, tilt and motion measurement in three dimensions, a two-dimensional joystick (with its companion “Nunchuk”), and multiple buttons. This paper examines the use of the system in two musical contexts: controlling an electronic orchestra performing classical repertoire, and creating a new type of multi-parameter, multi-user synthetic instrument.

* Eidola – An Interactive Augmented Reality Audio-Game Prototype: Paper by Nikolaos Moustakas, Ionian University – Augmented reality audio represents a new trend in digital technology which enriches the real acoustic environment with synthesized sound produced by virtual sound objects. An audio-game, however, is based exclusively on audible feedback. This lecture presents an audio-game prototype which takes advantage of the characteristics of augmented reality audio for realizing more complex audio-game scenarios.

Other Highlights from the schedule of 154 Presentations Include:

* Intrinsic Mode Function Analysis for Loudspeaker Defect Detection and Classification: Poster by Wei Junfeng, Institute of Acoustics, Chinese Academy of Sciences – Traditional methods for detecting loudspeaker defects are based on the analysis of the high-order harmonics energy of the sound in the frequency domain. However, the structure of the time domain signal can be helpful to the classification of loudspeaker defects which would otherwise remain ambiguous in the frequency domain. An IMF criterion for determining irregular defects in the device under test will be presented.

* Maintaining Audio Performance in Portable Devices While Lowering Power Consumption: Paper by Peter Frith, Wolfson Microelectronics – Examines the major power consumers in a portable audio product and how careful codec design and innovative amplifier design can lower circuit power consumption in the analog / audio subsystem to significantly increase battery life.

* Spatial Soundfield Reproduction With Zones of Quiet: Poster by Thushara Abhayapala, Australian National University – Reproduction of a spatial soundfield over an extended region of open space with a designated quiet zone is a challenging audio signal processing problem. By engaging a graphic simulation of a 2D spatial soundfield, this presentation will illustrate how to reproduce a given spatial soundfield without altering a nearby quiet zone.

* The Effect of Whole-Body Vibration on Preferred Bass Equalization in Automotive Audio Systems: Paper by Durand Begault, NASA Ames Research Center – A set of experiments was conducted to study the effect of whole-body vibration on preferred low frequency equalization of an automotive audio system. Listeners indicated their preferred bass equalization for four different music programs reproduced through a high quality automotive audio system. The results reveal that the presence of whole-body vibration can reduce the preferred level of bass equalization by as much as 3 dB depending on the program, the level of vibration, and the individual listener.

“The process of gleaning through almost 200 scrupulously researched proposals is daunting work,” AES Executive Director Roger Furness concludes. “Each year we see a steady flow of submissions. The review board is tasked with selecting the most timely, and technically relevant from a field of extremely high-level candidates. We are indebted to our presenters for their willingness to share their knowledge, and to our Co-Chairs for building the best possible program from a splendid array of options.”

Comprehensive abstracts of all Papers and Posters will be available soon on the Calendar of Events to be posted at http://www.aes.org/events/127/.

The 127th AES Convention will be held at NY’s Javits Center Oct. 9 – 12, 2009

Photo: 127th AES Convention Papers Co-Chair Veronique Larcher


The Audio Engineering Society was formed in 1948 by a group of concerned audio engineers. The AES counts over 14,000 members throughout the U.S., Latin America, Europe, Japan and the Far East. The organization serves as the pivotal force in the exchange and dissemination of technical information for the industry. For additional information visit http://www.aes.org

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