摘要
小型差分传声器阵列单元的安装误差对实验结果有一定的影响。提出2种方法分析小型差分传声器阵列安装的误差,即相位法和互相关法。结果表明使用相位法分析连续变化的时间差具有更高的精度。通过寻找误差引起的原因,有效校准了单元位置,并对校准前后的阵列性能作了对比。
To calibrate the effect caused by the installation errors of the elements of small differential microphone array, we use two methods of phase analysis and cross correlation to acquire these errors, and the results show that the method of phase analysis could obtain a comparatively higher precision. With the inquiry of reasons which cause the errors, we calibrate the array elements and compare the performance of the calibrated array with that of the un-calibrated.
出处
《电声技术》
2005年第5期19-22,共4页
Audio Engineering
关键词
传声器阵列
延时相加
互相关
插值DFT
microphone array
delay-and-sum
cross-correlation
interpolated DFT
