Microphone Interface - Noise Issues

Hi ,

Has anyone done microphone interface on Beagle board ? In our board , we interfaced an analog mic to “main_mic”. It records audio in the android application. Volume is very low and we need to keep the microphone very close to the mouth for the system to record the audio. When we increased the mic amplifier Gain, sensitivity improved. But the Noise is too high.

Any suggestions for a low noise mic interafce on Beagle board ?

Thanks & Regards,

You need an amplifier stage and to filter the input. You cannot just add a microphone.