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PhD defence by Niels W. Adelman-Larsen


12.10.2017 kl. 09.30 - 13.00


Reverberation times suitable for venues that present pop and rock music

The overall interest of the present work is to provide recommendations for room acoustics in halls that present pop and rock music. Generated metrics should give an acoustic consultant a basis for proposing changes that can ameliorate the perceived sound quality. Two surveys were carried out, one embracing 20 halls and 33 assessors completing 500 questionnaire forms and another survey of just two halls and 25 assessors. It was detected, that the room acoustic quality of the performance space is of paramount importance for professional musicians and sound engineers. With statistical significance it was shown that what separates the best from the less well-liked halls is a relatively short reverberation time in the 63-250 Hz octave bands. It was also found that a very large share of venues in at least Europe, have a quite long reverberation time at these low frequencies and since rock and pop concerts are popular it is likely that a very substantial amount of live concerts in general could have sound quality enhanced significantly by making relevant halls comply with the proposed reverberation times especially at low frequencies. Further it was substantiated, with statistical significance, that venues prepared for standing audience concerts advantageously can have longer reverberation times at higher frequencies than at low in empty state. Projecting professionals are given a rather vast qualitative collection of drawings, photos and acoustic data from 55 non-rated European halls to draw inspiration from when looking for a layout and design of a new hall or the refurbishment of an existing one. Some of these 55 halls are quite large and a cautious proposal for suitable reverberation times in larger venues is suggested.

Assessment Committee
Associate Professor Flemming Christensen, Aalborg University, Denmark (Chairman)
Professor Peter Svensson, Norwegian University of Science and Technology, Norway
Associate Professor Tapio Lokki, Aalto University, Finland

Professor Dorte Hammershøi, Aalborg University, Denmark

Associate Professor Børge Lindberg, Aalborg University, Denmark

After the defence there will be a reception outside the auditorium Fredrik Bajers Vej 7B3-104


Free of charge


Signal and Information Processing, Department of Electronic Systems


Aalborg University, Fredrik Bajers Vej 7B 3-104