Vehicle interior active noise cancellation

An active noise cancellation (ANC) system for use with a vehicle having a vehicle body defining a vehicle interior and at least one electric drive mode, the ANC system comprising:

• a first set of audio speakers positioned outside of the vehicle interior;
• a second set of audio speakers positioned within the vehicle interior;
• and
• a controller operable for:
• automatically generating an acoustic signal during the at least one electric drive mode;
• processing the acoustic signal to thereby generate a modified acoustic signal, wherein the modified acoustic signal represents an attenuated portion of the acoustic signal resulting from a propagation of the acoustic signal from the first set of speakers, through the vehicle body, and into the vehicle interior;
• generating a cancelling signal having an amplitude that is proportional to that of the modified acoustic signal and a phase that is opposite that of the modified acoustic signal;
• and
• broadcasting the acoustic signal via the first set of audio speakers in a coordinated manner with a broadcasting of the cancelling signal via the second set of audio speakers, thereby substantially cancelling the modified acoustic signal within the vehicle interior.

A method for actively cancelling a synthesized sound within a vehicle interior of a vehicle having a vehicle body defining the vehicle interior, at least one electric drive mode, a first set of audio speakers positioned outside of the vehicle interior, and a second set of audio speakers positioned within the vehicle interior, the method comprising:

• collecting a set of vehicle operating values, including detecting the at least one electric drive mode;
• generating an acoustic signal as the synthesized sound during the at least one electric drive mode, the acoustic signal having a characteristic that is determined at least in part by the set of vehicle operating values;
• processing the acoustic signal to thereby generate a modified acoustic signal, wherein the modified acoustic signal approximates an attenuated portion of the acoustic signal resulting from a propagation of the acoustic signal through the vehicle body and into the vehicle interior;
• generating a cancelling signal adapted to substantially cancel the modified acoustic signal within the vehicle interior;
• and
• coordinating the broadcast of the acoustic signal via the first set of audio speakers and the cancelling signal via the second set of audio speakers during the at least one electric drive mode to thereby cancel the modified acoustic signal within the vehicle interior.