[adj] loud enough to cause (temporary) hearing loss
earsplitting, loud, roaring, thunderous, thundery
booming, ear-piercing, ear-rending, ear-splitting, earthshaking, forte, fortissimo, full, intense, loud, loudish, loud-sounding, pealing, penetrating, piercing, plangent, pungent, reeking, resounding, ringing, sonorous, stentoraphonic, stentorian, stentor