Wave analysis at frictional interface: A case wise study Akanksha Srivastava, Amares Chattopadhyay, Pooja Singh and Abhishek Kumar Singh Eur. Phys. J. Plus, 133 3 (2018) 112 Published online: 19 March 2018 DOI: 10.1140/epjp/i2018-11923-2