TY JOUR TI Interrelation of acoustic indicators of wood ate with parameters of a slope of a ravine KW kern KW wood density KW velocity KW acoustic constant angle of slope of a ravine KW a place of growth of a tree JO Actual directions of scientific researches of the XXI century: theory and practice AU Yalpaeva, E.. AU Kolesnikova, A.A. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov