The Collaborative International Dictionary of English v.0.48:

Raucity \Rau"ci*ty\ (r[add]"s[i^]*t[y^]), n. [L. raucitas, from
   raucus hoarse: cf. F. raucit['e].]
   Harshness of sound; rough utterance; hoarseness; as, the
   raucity of a trumpet, or of the human voice.
   [1913 Webster]