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

• Authors: M. Meissner
• Languages of publication: EN

Abstracts

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.

Keywords

EN

43.55.Br; 43.55.Ka; 43.20.Ks; 43.60.Ac

• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 119
• Issue: 6A
• Pages: 1031-1034

Dates

published

2011-06

Contributors

author

M. Meissner

• Institute of Fundamental Technological Research, Polish Academy of Sciences, A. Pawińskiego 5B, 02-106 Warsaw, Poland

References

• 1. G. Buresti, G. Lombardi, J. Bellazzini, Chaos, Solit. Frac. 20, 149 (2004)
• 2. Y. Yan, K. Ahmad, M. Kunduk, D. Bless, J. Voice 19, 161 (2005)
• 3. L. Huageng, F. Xingjie, E. Bugra, Am. Inst. Aero. Astr. J. 47, 923 (2009)
• 4. M. Meissner, Arch. Acoust. 32, 213 (2007)
• 5. M. Meissner, in: Renewable Energy, Innovative Technologies and New Ideas, Eds. D. Chwieduk, R. Domański, M. Jaworski, Publishing House of Warsaw University of Technology, Warsaw 2008, p. 265
• 6. M. Meissner, Arch. Acoust. 33, 159 (2008)
• 7. M. Meissner, Acta Phys. Pol. A 118, 123 (2010)
• 8. M. Meissner, Arch. Acoust. 34, 491 (2009)
• 9. E. Bedrosian, Proc. IEEE 51, 868 (1963)
• 10. E. Dowell, G. Gorman, D. Smith, J. Sound Vib. 52, 519 (1977)
• 11. M. Meissner, Applied Acoust. 69, 583 (2008)
• 12. M. Schroeder, J. Acoust. Soc. Am. 99, 3240 (1996)
• 13. L.E. Kinsler, A.R. Frey, Fundamentals of Acoustics, Wiley, New York 1962
• 14. M. Meissner, Cent. Eur. J. Phys. 5, 293 (2007)

Identifiers

DOI

10.12693/APhysPolA.119.1031