TY JOUR TI MODERN SOUND-ABSORBING MATERIALS AND STRUCTURES KW acoustics KW sound absorption KW sound-absorption coefficient KW enclosing structures KW classification KW lining JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Radouckiy, V.Y. AU Shuljenko, V.N. AU Stepanova, M.N. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov