I salvaged a mic element from a USB headset. I might use it in a simple amplifier-speaker circuit, or to visualize sound on my oscilloscope (when it arrives, it's in the mail). I'm aware this kind of mic needs a +5v signal to operate, and that I'll need to filter that back out with a capacitor.
I see what looks like a surface mount device soldered onto the bottom of the mic. What do you think this is?
I did some googling and found this image from
this site:

So maybe it's that resistor? I don't see this on all microphones though (looking at photos on the internet).
Thanks.