Robust Design of Multi-zone Sound Field Control Based on Subband Decomposition

In the realm of multi-zone sound field control, the performance unavoidably suffers from variations in the manufacturing of loudspeaker components. This paper intro-duces a robust design approach based on subband decom-position, which characterizes the manufacturing disparities of loudspeakers within each subband. Initially, the wideband audio signal is decomposed into distinct subbands. Subsequently, the excitation parameters of the loudspeaker array are computed within each subband. During the parameter solving process, the manufacturing errors of the loudspeakers are modeled using probability distributions, resulting in the determination of robust parameters for the loudspeaker array. Through simulations and experiments, this robust design method is demonstrated to effectively address the performance degradation issue stemming from manufacturing variations in the loudspeaker array during real-world applications.