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Two new solutions for adjustable acoustics in multi purpose concert halls
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
2007 (English)In: 19th International congress on acoustics, ICA 2007 : Madrid: Acoustics for the 21st century / [ed] Antonio Calvo-Manzano, Madrid: Spanish Acoustical Society , 2007Conference paper (Refereed)
Abstract [en]

In the Swedish cities Lulea and Pitea two new multi purpose halls for classic concerts and amplified popular music, are being built. The sizes are around 650-900 seats. Both halls have been designed for adjustable reverberation time from 1,1 to 1,8 seconds. Two completely different solutions where chosen. The Lulea hall has a combination of solutions; adjustable wall absorbers, curtains and adjustable absorbing ceiling boxes. The new wall absorber construction is covering the side walls and comprises two panels with slots in front of each other and absorbers behind. One panel is driven by electric motors so that the slots are combined into openings or as closed panels. On the panels there are studs that act both as diffusors and as stiffeners to reduce low frequency losses. Measurements of absorption in lab and T60 in situ are presented, as well as analyses of the acoustic qualities. The Pitea hall is under construction and will have a completely different solution. The inner ceiling is constructed as a number of stiffened panels that can be lowered by a large number of chain hosts, thus reducing the volume by 30%.

Place, publisher, year, edition, pages
Madrid: Spanish Acoustical Society , 2007.
Research subject
Engineering Acoustics
URN: urn:nbn:se:ltu:diva-34975Local ID: 94e87170-a3e2-11dc-8fee-000ea68e967bISBN: 84-87985-12-2 (PDF)OAI: diva2:1008227
International Congress on Acoustics : 02/09/2007 - 07/09/2007
Godkänd; 2007; 20071206 (anag)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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