In blindsight you lose the conscious experience of vision due to loss of the visual cortex, but you retain the ability to respond to visual information (due to intact subcortical visual processing). You don’t think you can see, you have no experience of ‘seeing’, but you can make rudimentary visually guided behaviours. I’ve been told that the experience is a lot like being able to make guesses which feel completely uninformed but are startlingly accurate.
Parallel to visual processing, auditory processing is also done subcortically and cortically (replace ‘visual cortex’ with ‘auditory cortex’, replace ‘superiour colliculus’ with ‘inferior colliculus’). I’m sure the correspondence isn’t exact, but how’s this for a prediction: deafhearing – following loss of auditory cortex the conscious experience of sound would be lost, but the ability to make responses based on noises would be retained due to intact subcortical auditory processing.
I haven’t trawled the annals of neuropsychology to see if this condition has ever been documented – and I‚Äôm not going to just yet since I prefer to sit here and speculate! – but I think it is strong possibility.
(interesting tangent: the link above, and here, draws out the parallel between blindsight and normal ‘intuition’ where we are required to make choices before all the (sensory) evidence is in)