I’m a little perplexed by the circuit model and meaning of a high or low impedance microphone. Here is an example where someone at this page is trying to investigate the effects of low or high mic impedance:
But my question is more primitive and fundamental here. The dynamic microphone is made of moving coil and the electret mic is made of capacitor. But Rm above is modeled as the output resistance of the mic.
My questions are:
1) What is Rm in real? Is it the DC resistance?? Or is it the inductive reactance of the coil or the capacitive reactance of the capacitor at particular frequency? If so isn't it wrong to model it as a pure resistor(Rm) in the circuit analysis? Is there better way to model the microphone impedance as a source and Thevenin equivalent?
2) When we say high impedance or low impedance microphone do we mean the output impedance hence Rm in the above diagram?