I know OSHA regulates noise in the workplace requiring training and providing hearing protection for employees. I know because when I was a technician before I retired at ATT and I was also a communications specialist with the Air Guard they both were very serious about safety. What bothers me is that a lot of retailers crank up the music esp. stores like Abercrombie and Fitch which I am sure they exceed the 85 db level. You will have gradual hearing loss when exposed to 85 db for 8 hours a day. I find that a lot of retail malls have music in open areas including parking lots. (the District in Tustin CA is one example) which is ridiculous because a person can be vulnerable to assaults because you cannot hear your attacker approach because of the noise. Because of my training and one bad incident in my twenties I began wearing earplugs to night clubs.