TY JOUR TI FUNCTIONAL DIFFERENTIAL AND DIFFERENTIAL MODELS OF SYSTEMS WITH ACOUSTICAL FEEDBACK KW acoustic feedback KW functional differential models KW differential models KW identification of echo models KW de-ayed feedback JO Bulletin of Bryansk state technical university AU Ermolaev, V.A. AU Kropotov, Y.A. AU Kholkina, N.E. PY 2019 IS 2019 PB Bryansk State Technical University