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  1. 1 Acta Physica Polonica A

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  1. 1 2011

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  1. 1 Meissner M.

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Numerical Modelling of Coupled Rooms: Evaluation of Decay Times via Method Employing Hilbert Transform

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Meissner M.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 6A
1031-1034
EN
In the paper, a usefulness of the Hilbert transform in a computer modelling of reverberant behaviour of rooms is demonstrated for the enclosure consisting of two coupled subrooms. In numerical simulations a decay of the sound pressure is computed and the Hilbert transform methodology is used to determine an envelope of this decay. Calculation results have shown that, because of the mode localization, a distribution of absorbing material has a great influence on decay times evaluated from changes in the pressure envelope. For example, when a difference between the sound damping in subrooms is large, the localization effect is responsible for a creation of a nonlinear decay of the sound pressure level characterized by rapid early and slow late sound decays.
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