In Part 3 of this 9-part course on modeling pressure acoustics in COMSOL Multiphysics®, learn how to add damping to your analysis. Up until this point, no damping has been included in the analysis, hence the model is assumed to be lossless. In this lecture, we discuss and demonstrate how to add some realistic damping to your model, including surface damping. The same example of modeling the acoustics in a room is used.