Evolution of ultrasonic impulses in chains of spheres using resonant excitation D. A. Hutchins, J. Yang, O. Akanji, P. J. Thomas, L. A. J. Davies, S. Freear, S. Harput, N. Saffari and P. Gelat EPL, 109 5 (2015) 54002 Published online: 11 March 2015 DOI: 10.1209/0295-5075/109/54002