I know I've been gone for a while because I've been thinking hard about this project I am beginning to do! What this project contains is a microphone - an op amp to boost the audio power then I would like this to be plugged into the ADC input for analysis. For instance, if the Arduino Uno detects a decibel of -60 to -80 decibel then it would trigger a LED to indicate an "abnormality". Why between -80 to -60? Electronic Voice Phenomenon usually occur at that lowest range. Would it be much wiser if I was just used a comparator instead? Any input would be most appreciated!