G'day,
One of my fellow aviators here in Oz is completely deaf in one ear. For several years he was banned from holding a commercial pilots ticket. Now he's CP of a small airline. In the mid eighties the rules changed (here in Oz at least) and he was made to do an operational test where he was required that he had the hearing ability to perform all the funtions required for commercial ops. He passed with no problems and still flies today.
Perhaps phone your regulator and get their opinion. You don't have to give them your name.
Cheers