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.