Wave Propagation in Dissipative Materials Judith Riley Akerman s¿inscrit à l¿école supérieur

Akerman s¿inscrit à l¿école supérieur L'INSAS à Bruxelles

Ruprecht-Karls-Universität Heidelberg (Deutsch-Polnische Rechtsschule)

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Wave Propagation in Dissipative Materials Judith Riley Akerman s¿inscrit à l¿école supérieurCommon experience reveals two basic aspects of wave propagation. First, while preserving their identity and travelling at definite speeds, sounds finally die out. Second, weak sounds may combine to form strong noises. Theories of acoustic propagation have succeeded in representing these aspects of experience separately, but never combined as in nature. The classical theories of sound in perfect fluids and elastic solids easily yield common speeds of