This thesis applies active noise control techniques to cancel large fan noise and white noise in a duct. A probe-tube microphone is designed for measuring noise in windy environment to avoid wind interference. We apply feedforward, feedback, hybrid and using FIR filters with feedback neutralization, and IIR filters with feedback neutralization algorithms for the experiments. Really time experimental results show the performance of the white noise cancelation in the duct is 18 dB(A), and 15dB(A) for the fan noise.