Active noise cancellation using H/sub /spl infin// control techniques

Abstract

The noise cancellation problem has been studied extensively. Low frequency (acoustic) noise attenuation has faced attention in industrial environments and in automobile applications. The modeling of the one-dimensional case (where sound travels in a duct and hence between 'wave guides') is relatively straightforward for example. In this paper, a laboratory experimentation of canceling noise using the H/sub /spl infin// control algorithm is presented. The setup consists of a rectangular wooden duct fitted with speakers (for actuation and noise) and microphones (for sensing). The system is interfaced to a stand-alone DSP board (dSPACE) with a TMS 320C31 chip and the control algorithm is implemented digitally on the DSP.