Permanent. I’m not sure you’d go totally deaf, but im sure it’d be pretty siicafgnint. 1/5 for a short period won’t do anything, just make sure if the bass is high, you turn it down a notch. http://nfpjaqsy.com [url=http://asibkmv.com]asibkmv[/url] [link=http://hdwdfydhf.com]hdwdfydhf[/link]