Hole under camera lens?

[Optimus82]

I noticed that on the 521 there is a small hole on the battery cover right under the camera. If you open the back and look right under the camera there is a bigger opening with what looks to be a screen/filter used for mics.

I've looked at pictures of the 520 and none of them have it. If this is a mic, is it used for calls for noise cancellation and/or video recording?

 

[calfee20]

It is a secondary mic for noise cancelation. I got this from this thread post #9: http://forums.windowscentral.com/nokia-lumia-521/225067-same-cover-520-a.html

He did not provide any links.

 

[Optimus82]

ahh.. shouldve included thread content in my search. sorry for taking up useless thread space.

thanks for the link