twizzlerlord --
Funny thing; I answered your post, asking you if it was the "low battery" tone. But in the last two hunts, my carrot started doing the exact same thing you described...making weird audio when you get near an item, SORT OF like the "low battery tone," but not the same. It's NOT the battery, it's something else. After awhile, in desperation, I whacked mine on my shovel, the cap end, and it "fixed" it, for a little while. It would start happening again, and so I whacked it, cap end first, on my shovel, and it "fixed it" again. For now, it is working, but I am sending it into Garrett for repair.
Anyway, ironic that mine started having the same issue as yours, right after I answered your post!
Steve