The Collaborative International Dictionary of English v.0.48:
Ear-splitting \Ear"-split`ting\, a. Deafening; disagreeably loud or shrill; as, ear-splitting strains. [1913 Webster]WordNet (r) 3.0 (2006):
earsplitting adj 1: loud enough to cause (temporary) hearing loss [syn: deafening, earsplitting, thunderous, thundery]