A sound field reproduction method called weighted pressure matching is proposed. Sound field reproduction is aimed at synthesizing the desired sound field using multiple loudspeakers inside a target region. Optimization-based methods are derived from the minimization of errors between synthesized and desired sound fields, which enable the use of an arbitrary array geometry in contrast with integral-equation-based methods. Pressure matching is widely used in the optimization-based sound field reproduction methods because of its simplicity of implementation. Its cost function is defined as the synthesis errors at multiple control points inside the target region; then, the driving signals of the loudspeakers are obtained by solving a least-squares problem. However, in pressure matching, the region between the control points is not taken into consideration. We define the cost function as the regional integration of the synthesis error over the target region. On the basis of the kernel interpolation of the sound field, this cost function is represented as the weighted square error of the synthesized pressures at the control points. Experimental results indicate that the proposed weighted pressure matching outperforms conventional pressure matching.
翻译:提出了称为加权压力比对的声频复制方法。 声频场复制的目的是在目标区域内使用多个扩音器对理想的音频场进行合成。 优化法来自尽量减少合成声场和理想声场之间的误差,从而能够使用任意的阵列几何方法,而以整体等分法为基础的方法。 压力比对广泛用于基于优化的声频场复制方法,因为其实施简单。 其成本函数被定义为目标区域内多个控制点的合成错误; 然后,通过解决最小方位问题获得扩音器的驱动信号。 但是,在压力比对时,没有考虑到控制点之间的区域。 我们把成本函数定义为目标区域综合差的区域一体化。 根据声音场的内核内部插图,这一成本函数作为控制点综合压力的加权方差表示。 实验结果显示,拟议的加权压力比对常规压力比对齐。