Originally Posted by
Packrat
Except for the military I have never had my hearing tested for a first class medical.
You're supposed to get it tested according to 67.105(a). A cursory reading suggests that one ear is sufficient so long as the test is conducted in accordance with 67.105(a)(2). Hopefully an AME can provide more details.
In my practical experience I've always been tested with the method in 67.105(a)(1) aka. "Can you hear me now?... Good".