Modulation instability in nonlinear acoustic metamaterials with coupling coefficients Alphonse Houwe, Souleymanou Abbagari, Lanre Akinyemi, Mustafa Inc and Serge Yamigno Doka Eur. Phys. J. Plus, 138 6 (2023) 560 Published online: 24 June 2023 DOI: 10.1140/epjp/s13360-023-04195-8