I just don't get it, why is that allowed? There are clear guidelines on how many decibels for how long damages ears, and noise is simple to measure. I've been

I just don't get it, why is that allowed? There are clear guidelines on how many decibels for how long damages ears, and noise is simple to measure. I've been to concerts which were ear-splitting even up in the bleachers. It's just crazy to think how loud it would be right at the stage. I just don't understand how venues don't get sued into oblivion, and I wish they would because it's too goddamn loud to enjoy.