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View Code? Open in Web Editor NEWCode that implements the Least Mean Squares algorithm on a Teensy 4.0 with the corresponding audio shield to create Active Noise Cancellation in 1 dimension. A prototype was built using the Teensy device, 2 microphones, 1 speaker and a cylindrical apparatus. The prototype was able to reduce the perceived sound intensity from a constant 500 Hz noise noise by about 20 dB.