Theaterakoestiek: Een onderzoek naar het gebruik van de toneeltoren voor de ontwikkeling van variabele akoestiek / Theatre acoustics: A study to use the fly tower for the development of variable acoustics

Theaterakoestiek: Een onderzoek naar het gebruik van de toneeltoren voor de ontwikkeling van variabele akoestiek / Theatre acoustics: A study to use the fly tower for the development of variable acoustics

Scholts, K.

Nijsse, R. (mentor)
Schipper, H.R. (mentor)
Nijs, L. (mentor)
Bijvoet, P.B. (mentor)

Civil Engineering and Geosciences

Structural Engineering

Building Technology

2014-08-21

When one wants to make use of variable acoustics in a theatre, the volume of the auditorium is often changed by altering the ceiling height of the room. Besides this, an orchestra shell is placed to direct the sound towards the audience and to prevent delayed reverberation from the fly tower. Thus, extra space for the acoustic volume is created in the auditorium while space above the stage remains unused. This study focuses on the possibility of using the fly tower as acoustic volume for symphonic concerts. It researches which space above the stage can be used without the negative side-effects of delayed reverberation. To be able to compare different variations, the acoustic volume will be the same throughout the study. The study will propose to increase the size of the orchestra shell and to thus use more room on the stage. To compensate the extra volume, the ceiling height in the auditorium is lowered and the proscenium arch is increased together with the orchestra shell. The different variations of the study will be compared according to different parameters: the reverberation time (T-30), the early decay time (EDT), the strength (G) and the clarity (C-80). Results show that more space above the stage can be used as acoustic volume instead of creating extra space in the auditorium. The enlarged orchestra shell sometimes even produces an improvement of the acoustic quality of the theatre auditorium. This improvement is largely found in the reverberation time and the strength. In addition, the results are more evenly distributed over the hall. However, one has to take into account that sufficient diffusion is present in the orchestra shell. NB: please note that the study is in Dutch.

variable acoustics
theatre
orchestra shell
fly tower

http://resolver.tudelft.nl/uuid:4019b6a7-0060-4199-86c6-f1ff9c97dab2

Student theses

master thesis

(c) 2014 Scholts, K.