近场麦克风阵列幅相误差校正技术

Technology of calibration for gains and phases of microphone array in near filed

针对近场均匀麦克风线阵,提出了一种利用单个校正源对存在阵元幅度和相位误差的阵列模型进行校正的方法,该方法要求在已知校正源和各个阵元位置的前提下对阵列幅相误差进行估计,从而得出了阵列误差校正矩阵.对实际麦克风阵列校正的结果表明,该方法简单快速,计算量小,且具有较高的估计精度.

A calibration method to correct the errors of gain and phase of the element in the array by using a single calibration source was proposed for the uniform microphone array in near filed. With this method, the error matrix of amplitudes and phases was estimated in the condition that the calibration source and the position of every element in the array were known. The calibration result from the actual microphone array shows that this method is simple and fast With high precision and little computational efforts.