The Perendale originated in New Zealand from crossing the Border Cheviot with the Romney breed. They are an open-faced, medium-framed breed that produces bright, lofty, long-stapled, medium-wool fleeces. Developed as an easy-care sheep, they are both hardy and highly adapted to marginal forage-producing areas.
It depends how badly the eardrum is ruptured. Mine ruptured a couple of years ago from a bad ear infection, and it took me at least 3 weeks to get the ringing out of my ear. Depends a bit of how good you protect the ear from pressure changes; usually between 2 - 4 weeks. If you really do have an ear problem, do NOT mess 'round.
Answer Wiki. Tympanic membrane (ear drum for the laymen) has an amazing ability to heal itself in healthy ears. If the perforation (hole) was traumatic, say someone got slapped on the side of face which resulted in the perforation, the ear drum will heal within few weeks provided that no further insults to the affected ear occur.