In an electret microphone, what is the purpose of the resistor (lets call it R2) in series from the power supply to the mic? Does this have an effect on sensitivity? I've seen a lot of site saying that it can be 1-10kOhms and that the internal load resistance of the mic has an effect on the sensitivity, but not much on why the R2 is there and if it effects the output. I understand that it limits current if too high, but is that it? Can I just connect an electret without the resistor? It's also confusing since some sites call this the load resistor while others call the resistance between the output and ground the load resistor.
Thanks
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