Properties of general and partial scattering amplitudes and dispersion relations in quantum mechanics. Part II. Dispersion relations (review)

The review of dispersion relations for general and partial scattering amplitudes regarding acoustic fields which are the consequence principle of causality adapted for classical fields, submitting wave equations is presented. Titchmarsh theorem which is a theoretical substantiation of dispersion relations is given as well as analytical S-matrix properties. The mentioned effects can be used in problems of acoustic dispersion to which the problem of calculation of radiation pressure is reduced, in particular in media with losses.