Clicking/ringing noise coming from Nikon D3000 camera lens?

I recently dropped my camera about 1ft from a table onto a chair and now a weird clicking/ringing noise comes from the lens whenever I push the shutter button half-way. It's not loud and it doesn't affect the quality of my photos at all but it still irritates me since it wasn't there before.

Obviously it's from the drop and I'm taking it to get fixed but would anyone know what exactly is making this noise or what could be broken inside my camera lens?

Added (1). No sarcastic answers please.

I know it's from the drop, I take care of my camera despite the fact that it slipped from a table, and I know how to use my camera, so please don't underestimate me.

Looking for serious answers.

Added (2). I also do have a bestbuy warranty for my camera.

Could be a slipped gear.

I'd sell it on ebay as damaged, for parts, and get a new one, most likely cheaper than getting it fix.

Well, as you put it, obviously something is broken.

I'd suggest calling Nikon. Warranty doesn't matter because it was your mistake not theirs. I don't know what lens your talking about so consider also that if it's the 18-55 you may find out it'll be cheaper just to buy a new lens or put up with the noise.

I'm glad to hear you take care of your gear - that shows respect for the equipment. That's something so few here seem to have other than us regulars who've been at this a long time.