Abstract
This paper deals with active noise control based upon a virtual sensing, which does not require a reference signal of a primary sound source, hence termed non-reference virtual sensing ANC. There is thus no need to place an error sensor and a reference sensor at a control point and a primary sound source, respectively. Firstly, the principle of a virtual sensing is presented, followed by that of the estimation of a primary sound source frequency. For the purpose of enhancing the virtual sensing estimate, four sound sensors are employed, two of which are used for estimating the targeted sound amplitude and the others for minimizing the estimate error. Using the four sound sensors, the phase estimate of a virtual sensor output is also conducted, the algorithm for further improving the phase estimate being proposed. Finally, an experiment is carried out, verifying the validity of the non-reference virtual sensing ANC.
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