The Collaborative International Dictionary of English v.0.48:

Dysphonia \Dys*pho"ni*a\, Dysphony \Dys"pho*ny\, n. [NL.
   dysphonia, Gr. ?; dys- ill, hard + ? sound, voice: cf. F.
   dysphonie.] (Med.)
   A difficulty in producing vocal sounds; enfeebled or depraved
   voice.
   [1913 Webster]