Cooperative modes in a generalized nonlinear viscoelastic medium. II. Influence of nonlinearities upon sonic absorption and propagation

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Abstract
The perturbation technique developed in paper I of this series has been suitably modified for the treatment of the propagation vectors of cooperative modes, rather than their frequencies. The method has been applied to the problem of sonic absorption and propagation in a nonlinear viscoelastic medium. The results show departure from the results predicted by the linear theory.