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Effect of a chamber orchestra on direct sound and early reflections for performers on stage: a boundary element method study

Citation

Panton, LF and Holloway, DS and Cabrera, D, Effect of a chamber orchestra on direct sound and early reflections for performers on stage: a boundary element method study, Acoustical Society of America. Journal, 141, (4) pp. 2461-2472. ISSN 0001-4966 (2017) [Refereed Article]

Copyright Statement

Copyright 2017 Acoustical Society of America

DOI: doi:10.1121/1.4979119

Abstract

Early reflections are known to be important to musicians performing on stage, but acoustic measurements are usually made on empty stages. This work investigates how a chamber orchestra setup on stage affects early reflections from the stage enclosure. A boundary element method (BEM) model of a chamber orchestra is validated against full scale measurements with seated and standing subjects in an anechoic chamber and against auditorium measurements, demonstrating that the BEM simulation gives realistic results. Using the validated BEM model, an investigation of how a chamber orchestra attenuates and scatters both the direct sound and the first-order reflections is presented for two different sized "shoe-box" stage enclosures. The first-order reflections from the stage are investigated individually: at and above the 250 Hz band, horizontal reflections from stage walls are attenuated to varying degrees, while the ceiling reflection is relatively unaffected. Considering the overall effect of the chamber orchestra on the direct sound and first-order reflections, differences of 25 dB occur in the 1000 Hz octave band when the ceiling reflection is excluded (slightly reduced when including the unobstructed ceiling reflection). A tilted side wall case showed the orchestra has a reduced effect with a small elevation of the lateral reflections.

Item Details

Item Type:Refereed Article
Keywords:boundary element method, chamber orchestra, auditorium, stage, early reflections, performers
Research Division:Built Environment and Design
Research Group:Architecture
Research Field:Architectural Science and Technology (incl. Acoustics, Lighting, Structure and Ecologically Sustainable Design)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Engineering
Author:Panton, LF (Ms Lilyan Panton)
Author:Holloway, DS (Dr Damien Holloway)
ID Code:115811
Year Published:2017
Deposited By:Engineering
Deposited On:2017-04-11
Last Modified:2017-05-02
Downloads:0

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