Reaching high sensitivity of radio-acoustic spectroscopy using “strong microwaves” M.A. Koshelev, I.N. Vilkov, A.I. Tsvetkov, M.Yu. Glyavin and M.Yu. Tretyakov EPJ Web Conf., 149 (2017) 02028 Published online: 04 August 2017 DOI: 10.1051/epjconf/201714902028