Showing items with similar title or keywords.

• Time-harmonic solution for acousto-elastic interaction with controllability and spectral elements 

  Mönkölä, Sanna (Elsevier, 2010)

  The classical way of solving the time-harmonic linear acousto-elastic wave problem is to discretize the equations with finite elements or finite differences. This approach leads to large-scale indefinite complex-valued ...

• Numerical methods for acoustics and noise control 

  Airaksinen, Tuomas (University of Jyväskylä, 2010)

  This dissertation considers numerical methods for wave propagation modelling and noise control. The first part of the dissertation discusses an efficient method for solving time-harmonic wave equations in acoustic (the ...

• Controllability method for acoustic scattering with spectral elements 

  Heikkola, Erkki; Mönkölä, Sanna; Pennanen, Anssi; Rossi, Tuomo (Elsevier, 2007)

  We formulate the Helmholtz equation as an exact controllability problem for the time-dependent wave equation. The problem is then discretized in time domain with central finite difference scheme and in space domain with ...

• Spectral element method and controllability approach for time-harmonic wave propagation 

  Mönkölä, Sanna (University of Jyväskylä, 2008)

• Comparison between the shifted-Laplacian preconditioning and the controllability methods for computational acoustics 

  Airaksinen, Tuomas; Mönkölä, Sanna (Elsevier, 2010)

  Processes that can be modelled with numerical calculations of acoustic pressure fields include medical and industrial ultrasound, echo sounding, and environmental noise. We present two methods for making these calculations ...