<unk>  is soft speech, especially resulting from a lack of coordination in the vocal musculature. This condition is a common presentation in Parkinson's disease. This condition is generally treated with voice training programs, use of shorter sentences, breathing exercises, and muscle training exercises for vocal cords.
Hypophonia
Misophonia
Diplophonia
Copropraxia
Metamorphopsia
Paratonia
Hypotonia
Hemiballismus