Photography and sound

Super article on the BJP regarding the use of audio alongside photography. The article contains lengthy quotes from both editorial and conflict photographers, and examines how audio from the original location of the image can both enhance and detract from slideshow exhibitions. It's all very though-provoking stuff, but one thing the article doesn't really consider is how the addition of an extra sensory layer can drastically alter a viewer's perception of an image. To get a bit Roland Barthes here, photography is processed by the human mind through denotations and subsequent connotations; in other words, what an image represents literally and in terms of meaning. When sound is thrown into the mix, it stands to reason that the brain has more to decode (or work with), so impressions of the image may well end up quite different than if they were viewing an unaccompanied photograph. One of the great beauties of photography is the fundamental  simplicity behind how it is consumed. Surely the addition of audio only distorts this?