title: Sampling the sound field in auditoria using large natural-scale array measurements.
abstract: Suitable data for spatial wave field analyses in concert halls need to satisfy the sampling theorem and hence requires densely spaced measurement positions over extended regions. The described measurement apparatus is capable of automatically sampling the sound field in auditoria over a surface of 5.30 m × 8.00 m to any appointed resolutions. In addition to discussing design features, a case study based on measured impulse responses is presented. The experimental data allow wave field animations demonstrating how sound propagating at grazing incidence over theater seating is scattered from rows of chairs (seat-dip effect). The visualized data of reflections and scattering from an auditorium's boundaries give insights and opportunities for advanced analyses.
authors.affiliation: Institute of Technical Acoustics, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany.
authors.forename: Ingo B
authors.initials: IB
authors.lastname: Witew
authors.affiliation: Institute of Technical Acoustics, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Vorländer
authors.affiliation: Graduate Program in Architectural Acoustics, Rennselear Polytechnic Institute, Troy, New York 12180, USA Ingo.Witew@akustik.rwth-aachen.de, mvo@akustik.rwth-aachen.de, xiangn@rpi.edu.
authors.forename: Ning
authors.initials: N
authors.lastname: Xiang