On Fulfillment of Energy Conservation Law in Theory of Elastic Waves V. V. Nevdakh1)

In accordance with the energy conservation law, total of a closed physical system must remain constant at any moment time. The traveling elastic wave consists kinetic in oscillating particles medium and potential its deformation. existing theory waves, it is believed that densities without losses are same time vary according to law. Accordingly, density such different various time, only time-averaged value remains constant. Thus, law not fulfilled. purpose this work give physically correct description these waves. A new sound an ideal gas has been proposed based on use equation for perturbing oscillation velocity particles, which determines their energy, deformation, energy. It shown harmonic solutions describing oscillations perturbation phase shifted by p/2, considered as equations wave. found positions maxima wave, described solutions, alternate space every quarter wavelength. established period losses, completely converted vice versa, while each spatial point consistent flux expression Umov vector. concluded can be oscillator.