I applied to 5 programs all across the country and none of them required either. A physics course is helpful, but we went over some of the necessary basic stuff in Hearing Science, which I think grad programs expect. Many schools only require basic math and statistics; I was lucky enough to be able to take the latter from the educational psych department so it was all about research and really relevant, so I definitely recommend taking stats in that department (or psychology) if you can!