University Of Tasmania
115811 - Effect of a chamber orchestra on direct sound and early reflections for performers on stage.pdf (3.17 MB)

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

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journal contribution
posted on 2023-05-19, 03:46 authored by Lilyan Panton, Damien HollowayDamien Holloway, Cabrera, D
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 2–5 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.


Publication title

Acoustical Society of America. Journal










School of Engineering


Acoustical Soc Amer Amer Inst Physics

Place of publication

Ste 1 No 1, 2 Huntington Quadrangle, Melville, USA, Ny, 11747-4502

Rights statement

Copyright 2017 Acoustical Society of America

Repository Status

  • Open

Socio-economic Objectives

Expanding knowledge in engineering