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Modelling and directionally encoding the acoustics of a room

Modelling and directionally encoding the acoustics of a room

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© IEE
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Geometrical methods are often used to model the acoustic properties of a room, but are valid only for high frequencies. At low frequencies, diffraction and the effects of room modes cannot be neglected. A method for modelling the two-dimensional propagation of sound within an enclosed room is presented which encompasses both of these particular properties by making use of a digital waveguide model.

Inspec keywords: acoustic waveguides; acoustic wave diffraction; architectural acoustics

Other keywords: digital waveguide model; directional encoding; enclosed room; room acoustics; acoustic diffraction; two-dimensional sound propagation; room modes

Subjects: Architectural acoustics

References

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      • L. Brillouin . (1953) Wave propagation in periodic structures.
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      • Savioja, L., Timo, J.R., Takala, T.: `Simulation of room acoustics with a 3D finite difference mesh', Proc. Int. Computer Music Conf., 1994.
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      • P.B. Johns , R.L. Beurle . Numerical solution of 2-dimensional scattering problems using a transmission-linematrix. Proc. IEE , 9
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      • K.H. Kuttruff . Auralization of impulse responses modelled on the basis of ray-tracingresults. J. Audio Eng. Soc. , 11
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      • Van Duyne, S.A., Smith, J.O.: `Physical modelling with the 2-D digital waveguide mesh', Proc. Int. Computer Music Conf., 1993.
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