Keep in mind that those statistics include the other more common MS speech
issue eg Dysarthria (scanning speech
pattern), so Dysphonia alone would only be a fraction of the 35-40%.
You are actually talking about experiencing 2 incomplete issues, incomplete because you are not additionally describing any thing else that is usually accompanying the MS speech issues.
Dysphagia = swallowing issues
Dysphonia = vocal changes ie hoarseness, tone, breathy, or whispery
Q: "Does it go away?