Nonlinear Active Noise Control Based on VirtualSensing Technique in an Enclosure with a Flexible Panel

Recently, the attempts to overcome the nonlinear conditions have been taken into the considerationin many researches in active noise control (ANC), thus nonlinear filters have beenimproved widely. Moving the place of quite zone from error microphones to other points isanother goal in new ANC. Therefore, virtual sensing in ANC has been proposed to improvethe performance of ANC in real life. In this paper to overcome nonlinear situations in ANCsystems nonlinear FSLMS algorithm has been chosen and for the purpose of moving theplace of quite zone, the remote microphone virtual sensing technique is considered. ThisANC system is implemented experimentally in an enclosure with a flexible panel. The experimentalresults show better sound attenuation in the place a part from the physical error pointdue to using virtual sensing technique. In addition, the performance of two different algorithms(i.e. linear FXLMS and nonlinear FSLMS) are compared for different input noise signalsand is shown that FSLMS has better performance but is more difficult to implement and more complicated to tune the parameters

Keywords:

Nonlinear active noise control , FXLMS , FSLMS , Virtual sensing technique