I am seeking references on the subject of human speech intelligibility as a function of individual phoneme distortions. I can't seem to find what I'm looking for. Can anybody help point me in the right direction?
I'd specifically like to know how word intelligibility holds up when distortions of a particular phoneme class would cause members of that class to be highly confusable when presented in isolation.
More generally, I wonder how well humans can do when consonants are relatively clear but vowels are highly ambiguous.
suppose two ways this might have been studied would have been using, on the one hand, noise or channel distortions specifically targeted to distorting certain phoneme classes; or, on the other hand, manipulating the signal by switching certain phonemes to other perceptually nearby phonemes.