Prediction tools in acoustics - Can we trust the PC?

Prediction models and computer simulations are indispensable tools for design and consulting in various fields of acoustics such as architectural acoustics and sound design for vehicles or household appliances. The reliability of results from such computer tools depends on the quality of the algorithm which provides a best estimate of the sound and vibration data of interest. Also relevant is the quality of input data such as geometry or boundary conditions and, of course the skills of the operator. This presentation focuses on sources of uncertainties in computer models, on actual status in solving indoor acoustic problems as well as simulation of structural acoustics. Special emphasis is put on the relevance of uncertainties with respect to perception and just–noticeable differences.