Optimization of virtual-real hybrid loudspeaker array structure for vehicle interior sound zone control

Abstract

Sound zone control technology can facilitate audio separation without interference between different zones within a vehicle. Nonetheless, it is acknowledged that alterations in the loudspeaker array structure can have implications on the effectiveness of sound zone control. Furthermore, due to the narrow space inside the car, the optimization of the loudspeaker array structure becomes very difficult by limitations on the number of loudspeakers. A method for the optimization of virtual-real hybrid loudspeaker array structure for vehicle interior sound zone control is proposed. Construct a virtual-real hybrid loudspeaker array and use a loudspeaker array structure optimization algorithm to obtain a better loudspeaker array structure. In this method, virtual loudspeakers are introduced to increase the number of loudspeakers, which allows for the consideration of more loudspeaker positions even with a limited number of real loudspeaker locations, ultimately resulting in a more optimal loudspeaker array structure. Finally, the optimization of virtual-real hybrid loudspeaker array structure for sound zone control was validated through sound field zoning experiments in the vehicle cabin. The results confirmed that the proposed method can achieve a better optimized vehicle interior loudspeaker array.