After years, I finally started looking online for ways to make a PS3 Slim quieter (maybe I did it years ago and have forgotten). Some folks claim that theirs are dead silent, while others say that theirs are louder like mine. It's not vacuum-cleaner loud, mind you.
But, I do have to turn up the volume on some programs to hear them over it, and I'd prefer to not have to do that.
I think that I might play around with it a bit this weekend.