Speaker
Description
This paper proposes a hybrid active noise control (ANC) system using a parametric array loudspeaker (PAL) and a conventional dynamic loudspeaker (DL) as secondary sources. The proposed configuration exploits the high directivity of the PAL and the low-frequency efficiency of the DL to realize low-frequency noise reduction while mitigating spillover outside the control region. The control signal is decomposed into low- and high-frequency bands via a crossover filter, with the PAL handling the high-frequency component and the DL generating the low-frequency component. Real-time experimental evaluations confirm that the proposed system provides a well-defined noise reduction region with improved low-frequency attenuation and reduced spillover compared to ANC systems employing only a DL or a PAL.