An adaptive system for active cancellation of the acoustic field with an auxiliary identification channel

An adaptive system for active cancellation of a narrow-band random acoustic field with an auxiliary identification channel for modeling a time-dependent acoustic path is investigated. The stability criterion of the system is found. The active cancellation system proposed has been tested experimentally.Lobachevskii State University, Nizhny Novgorod. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 38, Nos. 3–4, pp. 196–201, March–April, 1995.