TY JOUR TI Definition of a zone of efficiency of active suppression of the noise extending on axisymmetric designs KW active noise control KW mathematical modeling KW wave equation. JO Actual directions of scientific researches of the XXI century: theory and practice AU Polivaev, O.. AU Kuznyetsov, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov