Possible Vacuum Pump Issue?

[nU7OuxIx]

After I got done installing my winch, I pulled the car back in and my wife was like what is that noise?!? I took a look and it's, what I believe, is the vacuum pump on top of the engine. When you hit the brakes, it kind of sounds like air trying to get out.

I took a look and it did sound loud, but maybe I'm just being hyper critical. Does this sound normal? I know the vacuum pump is there to assist the brakes and that's how it normally works, but it was just noticeably louder.

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[nU7OuxIx]

Well, I should had google'd that... ?

Turns out there's a few posts about it already here and it sounds like it's completely normal.