In “Camera Feature: Audio Recording“, Jack Prominski of ProminskiPhoto describes a feature found in pro cameras that is often overlooked: audio recording.
Many top-of-the-line professional digital cameras allow the photographer to annotate their photos with audio clips. Fire off a series of shots, then record a quick description of what’s going on. This feature is very useful for journalists and, as Jack notes, many sports photographers. The reason you do not hear about this much is because audio recording is not currently available in entry level, advanced amateur, or prosumer camera models.