On the gain sensitivity of reversed acoustic signal at parametric resonance conditions to small variations in wavelength

The ultrasound wave propagation in a sample of finite length under parametric resonance conditions caused by the modulation of sound velocity in a magnetostrictive material by a variable magnetic field, is simulated numerically to fill in the gaps in the earlier analytical solutions for discrete values of sample length to acoustic wavelength ratio, demonstrating a high sensitivity of the reversed signal gain to small variations in the above ratio.