TY JOUR TI CHARACTERISTICS OF SOUNDPROOFING BUILDING MATERIALS KW acoustic materials KW sound-proofing KW sound absorption KW reflection KW noise KW reflection coefficient JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Radouckiy, V.Y. AU Shuljenko, V.N. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov