SSM2167 DC3-5V Microphone Preamplifier Board

 

The SSM2167 is a low-voltage, low-noise mono microphone preamplifier ideal for low-power audio signal chains. This preamplifier includes a built-in compression and noise gate. The dynamic range of the compressed microphone signal reduces the peak signal level and adds additional gain to the low-level signal. Noise gate attenuates the signal level below a certain threshold to amplify only the desired signal, such as speech, and reduce noise in the output signal. These features will help improve the clarity of the audio signal received by the microphone. You can change R1, R2 values ​​according to your needs.