数字均衡算法在虚拟电声测试仪器中的应用

Application of digital equalization algorithm in the virtual electroacoustic testing instrument

针对在虚拟电声测试过程中所出现的频响偏差问题,提出了一种利用数字均衡算法来进行校准的方法。通过分析电声测试中信号经过DAC、ADC以及调理电路后的频响曲线,设计出合适的数字均衡器在信号播放与采集的过程中对信号滤波处理,从而对于出现的频响曲线失真进行补偿,使实验信号与标准信号的频响曲线更为接近,以满足电声测试对于实验信号的精度要求。仿真结果表明,该方法可以有效地进行信号补偿、提高电声测试的信号质量,对于测试结果也有较大的提升和改善。

This paper proposes a digital equalization algorithm that is used to adjust the virtual electronic measuring instruments in frequency response problems.In order to compensate the frequency response curve of distortion,make it accord with a standard signal waveform and meet the accuracy requirement of acoustic test for test signal,the test signal can be filtered by the appropriate digital equalization algorithm,through processing the frequency response curve of the acoustic test signal which is analyzed by ADC,DAC and the regulate circuit.The simulation results show that this method can effectively compensate the signal,better meet the electroacoustic testing to the quality of test signals and improve the test result.