Subband algorithm with threshold for robust broadband active noise control system

A method comprising:

• applying, via a processor-implemented adaptive subband filtered reference control algorithm, a first threshold to a reference signal path and a second threshold to an error feedback signal path such that, responsive to a series of broadband non-Gaussian impulsive reference signals indicative of road noise and detected by sensors, weight coefficients defining an adaptive filter of the control algorithm converge to permit partial cancellation of the road noise via output of a speaker.

An active noise control (ANC) system comprising:

• accelerometers, a microphone, and a speaker;
• and
• one or more processors programmed to implement an adaptive subband filtered reference control algorithm that applies thresholds to reference and error feedback signal paths such that, responsive to a series of broadband non-Gaussian impulsive reference signals detected via the accelerometers or microphone and indicative of road noise in a vehicle having an audible frequency range of 20 Hz to 20 kHz, weight coefficients defining an adaptive filter of the control algorithm converge and permit the ANC system to partially cancel the road noise via output of the speaker.