Synonyms for Rasping (same or very similar meaning)
WordNet sense 1 (uttering in an irritated tone):
raspWordNet sense 2 (unpleasantly harsh or grating in sound):
grating, gravel, gravelly, raspy, rough, scratchyWordNet sense 3 (having an unpleasant sound):
cacophonous, cacophonicFrom the ODE community, based on WordNetadd/edit