What's that? Please help me identify
 

Howdy all,
Here's the photo of a device that drag my attention today. It is located on top, right over the driver's door. Once the car power is on, something underneath the round mesh is giving an audible growling sounds (like a micro pump or an actuator). I thought it's a speaker, but it doesn't looks like and it is located only on a driver's side (not the passenger one).

Please help me identify what that would be. Thanks in advance,
Cheers, Mike
https://cimg7.ibsrv.net/gimg/blazerf...9f60d0cb7a.jpg

I used to think it was a speaker/ Mic also- but I was corrected by someone on here a couple weeks ago.

It is part of the hvac system, I'm not 100% sure what function it serves though

Thanks mate!
I had a thought if not a speaker under the mesh so maybe an air supply... :)
But it does not solve my doubts regarding that growling sound. I have no idea if that is natural or shall I give it a closer look.

EDIT: Found it. It's an aspirator. It draws an ambient air from the interior to a climate sensor by a small fan. The fan must be doing there growling noises.