The Capacitor Type of MIC will give good response to your audio signals, you can measure its ohmic resistance is Varying by The sound level by puting your Multimeter in 1 Mega Ohms range...., Now you can measure the current you can get from the mic to amplify, If it is Micro Amp range The 741 may not be able to pick it as it has less amplitude level to respond its input transistors, But you are able to do it with FET input operational amplifiers... that will satisfy your need.....