SUBBAND ALGORITHM WITH A THRESHOLD VALUE FOR A STABLE BROADBAND ACTIVE NOISE REDUCTION SYSTEM

摘要

FIELD: noise cancellation.;SUBSTANCE: invention relates to active noise cancellation. Active noise cancellation system (ANC) in vehicle includes processor programmed to implement adaptive subband control algorithm with filtering of reference signal, which applies threshold values to error signal and reference signal paths such that in response to broadband non-coaxial pulse reference signals indicating road noise and detectable by sensors, weight coefficients set adaptive filter of convergence of control algorithm and enabled ANC system to partially suppress road noise by means of loudspeaker.;EFFECT: reduced level of extraneous noise.;20 cl, 10 dwg, 1 tbl