Active Acoustics in Concert Halls - A New Approach

• Autorzy: Woszczyk W.
• Języki publikacji: EN

Abstrakty

EN

Active acoustics offers potential benefits in music halls having acoustical shortcomings and is a relatively inexpensive alternative to physical modifications of the enclosures. One critical benefit of active architecture is the controlled variability of acoustics. Although many improvements have been made over the last 60 years in the quality and usability of active acoustics, some problems still persist and the acceptance of this technology is advancing cautiously. McGill’s Virtual Acoustic Technology (VAT) offers new solutions in the key areas of performance by focusing on the electroacoustic coupling between the existing room acoustics and the simulation acoustics. All control parameters of the active acoustics are implemented in the Space Builder engine by employing multichannel parallel mixing, routing, and processing. The virtual acoustic response is created using low-latency convolution and a three-way temporal segmentation of the measured impulse responses. This method facilitates a sooner release of the virtual room response and its radiation into the surrounding space. Field tests are currently underway at McGill University involving performing musicians and the audience in order to fully assess and quantify the benefits of this new approach in active acoustics.

Słowa kluczowe

EN

virtual acoustics; active acoustics; electronic architecture; adjustable acoustics; acoustic support; multichannel convolution

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2011
• Tom: Vol. 36, No. 2
• Strony: 379--393
• Opis fizyczny: Bibliogr. 20 poz., fot., wykr.

Twórcy

autor

Woszczyk W.

• McGill University CIRMMT, Schulich School of Music Montreal, Quebec, Canada H3A1E3,

Bibliografia

• 1. Anderegg R., Franke U., Felber N., Fichtner W. (2004), Implementation of High-Order Convolution Algorithms with Low Latency on Silicon Chips, Paper 6304, AES 117th Conv., San Francisco, Oct. 28-31.
• 2. Dammerud J.J., Barron M. (2008), Concert hall stage acoustics from the perspective of the performers and physical reality, Proceedings of the Institute of Acoustics, 30/3.
• 3. Gade A.C. (1989), Investigations of musicians' room acoustic conditions in concert halls. Part II: field experiments and synthesis of results, Acustica, 65, 249-262.
• 4. Gade C.A. (2008), Trends in preference, programming and design of concert halls for symphonic music, Acoustics'08, International Congress of Acoustics, p. 346, Paris, June 29-July 4.
• 5. Gade C.A. (2010), Acoustics for symphony orchestras; status after three decades of experimental research, Proceedings of the International Symposium on Room Acoustics, ISRA2010, 29-31 August, Melbourne, Australia.
• 6. Griesinger D. (1991), Improving room acoustics through time-variant synthetic reverberation, Audio Eng. Soc. 90th Conventuon, Preprint 3014.
• 7. Kawakami F., Shimizu Y. (1990), Active field control in auditoria, Appl. Acoust., 31, 47-75.
• 8. Olson H.F. (1959), Acoustoelectronic auditorium, J. Acoust. Soc. Am., 31, 7, 872-879.
• 9. Parkin P.H., Morgan K. (1964), Assisted Resonance system in the Royal Festival Hall, J. Sound Vib., 1, 3, 335-342.
• 10. Petzold E. (1931), Regulating the acoustics of large rooms, JASA October, pp. 288-291.
• 11. Poletti M.A. (1999), Wideband assisted reverberation system, US Patent No. 5,862,233, Jan. 19.
• 12. Poletti M.A. (2007), In-line early reflection enhancement system for enhancing acoustics, US Patent No. 7,233,673. Jun. 19.
• 13. Poletti M.A. (2010), Active Acoustic Systems for the Control of Room Acoustics, Proceedings of the International Symposium on Room Acoustics, ISRA2010, 29-31 August 2010, Melbourne, Australia.
• 14. Prinssen W., D'Antonio P. (1997), The History of Electronic Architecture and Variable Acoustics, SIAP Ref: WP/wg/Z01ZA003.56, 19 August, published online.
• 15. Schwenke R., Ellison S. (2010), Objective Assessment of Active Acoustic System Performance, Proceedings of the International Symposium on Room Acoustics, ISRA2010, 29-31 August, Melbourne, Australia.
• 16. Svensson P. (1996), On reverberation enhancement in auditoria, PhD Dissertation, Chalmers Univ. of Technology, Gothenburg, Sweden.
• 17. Woszczyk W., Beghin T., de Francisco M., Ko D. (2009a), Recording Multichannel Sound Within Virtual Acoustics, Paper Number 7856, Proceedings of the 127th Convention of Audio Engineering Society, New York, NY, USA. October 9-12, ISBN: 978-0-937803-71-4.
• 18. Woszczyk W., Ko D., Leonard B. (2009b), Convolution-based virtual concert hall acoustics using aural segmentation and selection of multichannel impulse responses, [in:] The Proceedings of INTER-NOISE 2009, The 38th International Congress and Exposition on Noise Control Engineering, Ottawa, Canada, August 23-26.
• 19. Woszczyk W., Leonard B., Ko D. (2010a), Space Builder - an impulse response-based tool for immersive 22.2 channel ambiance design, Proceedings of the AES 40th International Conference, Tokyo, Japan, October 8-10.
• 20. Woszczyk W., Ko D., Leonard B. (2010b), Virtual Stage Acoustics: a flexible tool for providing useful sounds for musicians, Proceedings of the International Symposium on Room Acoustics, pp. 1-8, ISRA 2010, 29-31 August, Melbourne, Australia