Abstract
Instability of a dynamical system near a subharmonic resonance is manifested in the prolongation of transient processes. It is shown for nonlinear pulsations of a gas bubble under the action of an acoustic carrier signal modulated by a pulse that the subharmonic radiation observed experimentally below the generation threshold can be explained by the contribution of characteristic oscillations which arise at the moment the pulse arrives and have a damping time comparable to the pulse duration, due to the parametric energy transfer.
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