Active noise control with virtual sensors in a long narrow duct. Active noise control with virtual sensors in a long narrow duct. The zone of local control around a 'virtual energy density sensor' is compared with that associated with an actual energy density sensor, a single microphone and a virtual microphone in a long narrow duct which approximates a one dimensional waveguide. The sensors are numerically evaluated in a finite element model of the duct, with control implemented via quadratic optimisation.
Experimental verification validates the algorithm performance under actual test conditions.
It is shown that virtual sensors can outperform actual sensors in terms of centering a practically sized zone of local control around an observer location in the duct. This material is now only available to staff and students of the University of Adelaide.