Excitability in a nonlinear magnetoacoustic resonator
  We report a nonlinear acoustic system displaying excitability. The considered system is a magnetostrictive material where acoustic waves are parametrically generated. For a set of parameters, the system presents homoclinic and heteroclinic dynamics, whose boundaries define a excitability domain. The excitable behaviour is characterized by analyzing the response of the system to different external stimuli. Single spiking and bursting regimes have been identified. 
Victor J. Sanchez-Morcillo, J. Redondo and J. Martinez-Mora