Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

dysphonia
     n : speech disorder attributable to a disorder of phonation