一种无重叠频带的自适应非对称并联图示均衡器校正方法

An Adaptive Asymmetric Parallel Graphic Equalizer Correction Method without Overlapping Frequency Bands

针对车载音响的声场校正精度低、效率低的问题,该文提出一种无重叠频带的自适应非对称并联图示均衡器校正方法。在车载音响声场动态变化情况下,该方法考虑了有效均衡范围和自适应增益,而不是经典方法中的固定均衡范围和人工给定的增益。通过对实测数据进行实验分析,所提方法比经典方法所用均衡滤波器个数平均减少大约20%,拟合目标增益更准确,校正后频谱曲线更平坦。

In order to solve the problem of low accuracy and low efficiency of car loudspeakers sound field correction,a correction method of adaptive asymmetric parallel graphic equalizer without overlapping frequency bands is proposed in this paper.In the case of the dynamic change of the sound field in the car,the proposed method takes into account the effective equalization range and adaptive gains,rather than the fixed equalization range and given artificially gains in the classical methods.Through the experimental analysis of the measured data,the average number of equalization filters used by the proposed method is about 20%less than the classical methods,whose fitting target gains is more accurate,and the spectrum curve is flatter after correction.