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Active noise cancellation headset

A new design for a headset with active noise cancellation capability is presented. For the proposed headset, a variable-step-size normalized least-mean-square (VSS-NLMS) algorithm is adopted in the combined audio and feedback active noise cancellation system. Experimental results show that, for the same set of signals, the average noise reduction using the proposed adaptive algorithm is 38 dB compared with 36 dB using the normalized least-mean-square algorithm and 14 dB using the least-mean-square algorithm. The speed of convergence using the proposed approach is also faster compared with the other two cases. Informal listening tests also favor the adoption of the proposed VSS-NLMS adaptive algorithm.