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

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 artificially given 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.