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波场合成是一种空间声重放技术,利用扬声器阵列在宽阔的听音区域内重建声场。为消除或者消减听音房间的反射对重建波场的影响,利用测量环绕听音区域的闭合曲线上声压和声压梯度来分析波场,推导了基于圆形阵列进行波域分解的公式,利用多通道逆滤波进行了平面波域的房间补偿,实验结果显示该算法在整个听音区域内都是有效的。与传统补偿方法相比,边界元法所需的测量传声器数目少计算复杂度低,而波域分解具有更充分的波场分析能力,因此是一种更有效的有源房间补偿方法.
Wavefield synthesis is a spatial acoustic replay technique that utilizes a loudspeaker array to reconstruct the sound field over a wide listening area. In order to eliminate or eliminate the influence of the reflection of the listening room on the reconstructed wavefield, the wave field is analyzed by measuring the sound pressure and the sound pressure gradient on the closed curve of the listening area, and the formula of the wavefield decomposition based on the circular array is deduced. The multi-channel inverse filtering is used to compensate the room wave in the plane wavefield. Experimental results show that the algorithm is effective in the entire listening area. Compared with the traditional compensation method, the boundary element method requires less number of measurement microphones to calculate less, and the wave-field decomposition has more sufficient wave-field analysis capability, so it is a more effective active room compensation method.