first off, if you haven't already -- you should schedule an appointment with a veterinarian experienced in reptiles for a check-up to let him/her verify that everything is okay. ideally you will bring in a fecal sample to make sure that your new baby doesn't have parasites.
the other reply mentioned respiratory illness symptoms... if your tort has none of those, listen closely when it's making the sound. does it seem to be coming from *inside* the tort, or from its mouth? my redfoot, especially when he was a little baby, often made clicking/chirping noises with his beak, and i've read others here saying their torts made similar noises, so i'd not worry as long as there are no other symptoms present.
