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Handling of random processes in room acoustics

Handling of random processes in room acoustics. Bendegúz Bartha Laboratory of Acoustics 2011.06.20. Acoustic modeling. Multi-dimensional Free field wave propagation Building vibration etc. Focus on room acoustics Sound pressure inside Reverberation time etc. Uncertainty in modeling.

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Handling of random processes in room acoustics

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  1. Handling of random processes in room acoustics Bendegúz Bartha Laboratory of Acoustics 2011.06.20.

  2. Acoustic modeling • Multi-dimensional • Free field wave propagation • Building vibration • etc. • Focus on room acoustics • Sound pressure inside • Reverberation time • etc.

  3. Uncertainty in modeling H Output=H{Input, Parameters} Input Output • 3-way uncertainty • Input • Parameter • Model Softwares don’t handle this problem! (at the moment) Model parameters

  4. Model • Equations of the sound field • Solution: spectral finite element method • Tasks • Random process generation • Use this process in the model

  5. Random process • Karhunen Loeve expansion • Deterministic functions weigthed by random variables • Wall absorbation is a stochastic process

  6. Handling the random process • Monte Carlo method • Deterministic response for each realisation • Statistic analysis • Alternative methods • Perturbation method • ?

  7. Future work • Finish the software • 3rd case: random model

  8. Publications • This project • ICSV 2009 • Other project • Forum Acusticum 2011 • Journal of ?

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