TY - CPAPER AU - Miroslav Badida TI - RESEARCH OF SELECTED ACOUSTIC DESCRIPTORS OF THRE-LAYER SANDWICH ABSORBERS T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference PY - 2012 DO - 10.5593/sgem2012/s20.v5094 PB - Stef92 Technology ER -