Glory
It's glorious to be able to hear for the first time, or to hear again after not being able to for some time (due to a genetic issue, birth defect, trauma, rock concerts, old age, whatever). It's not the type of glory that entices a mayor to offer you the key to the city—unless, of course, you're the one who helped her to hear better or for the first time—but make no mistake, this job offers glory aplenty.
The glory is in watching the faces of the people whom you help. Glory is as glory does.