Kitty4670 wrote:
I have Cerebral Pasly so I have speech difficulties, I took speech therapy, I had trouble with sounds 's', 'b', 'p' & 'z'.
that doesn't at all seem out of the ordinary. 's'/'z', and 'p'/'b' are essentially the same phone, in that the same mouth/tongue configuration is used to produce them.
the only difference is that the latter sound (z/b) in those sets is
voiced, whereas the former sounds (s/b) are
unvoiced. that's pretty much the only factor that distinguishes them.
a sound is voiced when the vocal cords vibrate when saying them, you can test this yourself by putting your hand on your throat when pronouncing sounds.
as voicing is a major distinguishing factor in english phonemes (and indeed, throughout most european languages) being unaware of this distinction has been the source of many a speech therapy session.
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