%0 Journal Article %T FUNCTIONAL DIFFERENTIAL AND DIFFERENTIAL MODELS OF SYSTEMS WITH ACOUSTICAL FEEDBACK %A Ermolaev, V.A. %A Kropotov, Y.A. %A Kholkina, N.E. %K acoustic feedback, functional differential models, differential models, identification of echo models, de-ayed feedback %J Bulletin of Bryansk state technical university %D 2019 %N 2019 %P 7 %I Bryansk State Technical University