On control of harmonic waves in an acoustic metamaterial

Generation of harmonic waves in a mass-in mass model of an acoustic metamaterial is considered. It is shown numerically that outside the band gap, the boundary harmonic excitation gives rise to a formation of periodic waves whose profile gradually coincides with the profile of the exact traveling wave harmonic solution. No waves are generated by the boundary excitation inside the band gap. A switch-on/off control is developed to achieve the formation of the harmonic waves inside the band gap.

Automated summary

The study investigates the generation of harmonic waves in a mass-in-mass model of an acoustic metamaterial. It is found that boundary harmonic excitation outside the band gap leads to the formation of periodic waves, while no waves are generated inside the band gap. A switch-on/off control is developed to achieve the formation of harmonic waves within the band gap.