System and method for adjusting active noise cancellation tuning parameters

An active noise cancellation (ANC) system comprising:

• at least one audio signal source to provide an audio signal in a cabin of a vehicle;
• at least one loudspeaker to project anti-noise sound within the cabin of a vehicle in response to receiving an anti-noise signal;
• at least one microphone to provide a first error signal indicative of noise, the audio signal, and the anti-noise sound within the cabin and a second error signal indicative of an estimated anti-noise signal;
• and
• at least one controller programmed to:
• receive the first error signal and the second error signal;
• and
• provide an estimated impulse response based at least on the first error signal and the second error signal;
• select a first pre-stored impulse response from a plurality of pre-stored impulse responses based on the estimated impulse response to filter one or more reference signals at an adaptive filter to generate the anti-noise signal, and
• select a first plurality of tuning parameters based at least on one of a constant offset that is applied to one or more baseline tuning parameters and a variable offset value that is applied to the one or more baseline tuning parameters, and
• tune the adaptive filter with the first plurality of tuning parameters to generate the anti-noise signal.

A method for performing active noise cancellation (ANC), the method comprising:

• generating an audio signal to transmit in a cabin of a vehicle with at least one audio signal source;
• transmitting an anti-noise sound in the cabin of the vehicle via at least one loudspeaker in response to receiving an anti-noise signal;
• providing a first error signal indicative of noise, the audio signal, and the anti-noise sound within the cabin and a second error signal indicative of an estimated anti-noise signal;
• receiving the first error signal and the second error signal by at least one controller;
• and
• providing an estimated impulse response based on the first error signal and the second error signal;
• selecting a first pre-stored impulse response from a plurality of pre-stored impulse responses based on the estimated impulse response to filter one or more reference signals at an adaptive filter to generate the anti-noise signal,
• selecting a first plurality of pre-stored tuning parameters from a plurality of pre-stored sets of the tuning parameters based on the first pre-stored impulse response;
• and
• tuning the adaptive filter with the first plurality of pre-stored tuning parameters to generate the anti-noise signal.