From The Collaborative International Dictionary of English v.0.48 [gcide]:
Raspy \Rasp"y\ (r[.a]sp"[y^]), a.
Like a rasp, or the sound made by a rasp; grating. --R. D.
Blackmore.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
raspy
adj 1: unpleasantly harsh or grating in sound; "a gravelly
voice" [syn: grating, gravelly, rasping, raspy,
rough, scratchy]