You might also consider using this mems-based microphone module from sparkfun: SparkFun Analog MEMS Microphone Breakout - ICS-40180 - BOB-18011 - SparkFun Electronics. This module has the mic mounted and it runs from 3.3V and outputs a 1.65V signal with no audio input. The output will range from 0V to Vdd with loud sounds so it can easily be used with the Arduino ADC.