ITEM NAME:SSM2167 Microphone Preamplifier Board Low Noise COMP Compression Module jj jjpo.1 SSM2167 microphone preamplifier board. This preamplifier includes a built-in compression and noise gate,For this function,it is better than just using an op amp in the preamplifier circuit. The noise gate attenuates the signal level below a certain threshold,in order to amplify only the desired signal,such as speech, and reduce the noise in the output signal.
