well like I said before, I have never heard a pacman frog call but I do have a bullfrog that does. it is short. My bullfrog has only done one at a time. It is a deep and low croak, it almost sounds human. it scared me the first time I heard it because it was pitch black in my room. it is not continuous and he isnt loud. he could get louder as he gets older but it is nowhere as loud as the western toads we have in northern CA. My advice would be to not get one just because it might just take one time for your parents to tell you to get rid of it. my parents' rule is "nothing with fangs"