PROGRAMM - DAGA 2012

168 DAGA 2012 ProgrammMi. 9:45 chromium 2.02 Virtuelle Akustik 2Design and integration of a 3D WFS System in a cinema environmentincluding ceiling speakers - a case studyF. Melchior, S. Mauer und M. DauselIOSONO GmbHWith 3D picture being the driving force of today’s motion picture production,there is a growing need for adequate audio solutions with flexible3D loudspeaker setups. While these reproduction systems will have tofulfill high quality demands, the amount of loudspeakers should be keptas low as possible to optimize commercial aspects. Driven by the market,real 3D including loudspeakers mounted directly on the ceiling are arequirement for next generation cinema audio systems. This paper describesthe design and integration of a newly developed 3D spatial audiosolution based on wave field synthesis in a cinema environment. Thepaper discusses the acoustic design process of such a system basedon simulations and the integration based on an example installation in acommercial 400 seat cinema.Mi. 10:10 chromium 2.02 Virtuelle Akustik 2Ambisonic panning with constant energy constraintH. Pomberger und F. ZotterInstitut für Elektronische Musik und Akustik, KU GrazAmbisonics with height can be regarded as a panning technique forspherical loudspeaker arrangements surrounding the reproduction area.It applies a continuous panning function which is evaluated at each loudspeakerposition. A panning function with limited angular resolution isconveniently expressed by series of spherical harmonics of finite order.Ambisonics panning with uniformly arranged spherical loudspeakerarrays achieves good perceptual localization of virtual sound sources.However, panning performs unsatisfactorily with nonuniformly arrangedloudspeaker arrays. Virtual sources panned to directions with only sparseloudspeaker coverage appear with altered loudness levels. This contributiondiscusses a new Ambisonic panning approach which overcomesthis problem by imposing a constant energy constraint.