4. Non-linear acoustics
In 3 , the amplitude of the acoustic wave has been assumed to be very small, and the quadratic terms of the equations of motion have been neglected. The one-dimensional solutionv (x, t) = f (x ± c0t)
of the linearized equations of hydrodynamics and equation of state, is a traveling plane wave propagating at constant velocity c0, without changing shape.
When the amplitude of the disturbance is finite, non-linear...
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Non-linear acoustics
Attenuation
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