nope, the sound is from the belt.
It's either the belt, or the tensioner. Since you've driven so little, it's most likely NOT just the belt, since most cars never have this problem even at 30K.
If it's really that annoying (mine does it, and I know it is) take it to Toyota and have them look at it. Maybe your belt is worn, and you will have to pay them to replace it. They should give you the new belt which has a sort of felt like feel to it to reduce the sound.
Or, you could buy a gatorback belt and have them install it for you