Hi, i just wanted to add my two cents. When using hearing protection in a noisy environment be sure to not take it off. Our hearing adapts to loud noise if it increases gradually. If you use hearing protection and take them off in a noisy environment you could hurt your ears more than if you were not wearing them due to the sudden change in noise. I myself work in a noisy environment and i used to listen to IEM's for long periods of time. I had problems with ringing in my ears for about 30 days before it got better. It was quite loud to, i could hear it in my sleep. I am very careful now. Beside the good advice about vitamins and not od on coffee =( , sleep is very important, specially in a quiet environment.