We've already discussed this and I'm guessing you're still a young lady. I wish I was closer. That is not polite and it isn't acceptable. I wouldn't think twice about letting him know.
I do realize of course at your age you aren't as cantakerous as us older ladies. I would not hesitate at this blatent disregard for others.
He's been asked and asked to turn his stuff down. He'll apologize profusely, but he always does it again. It's like he's incapable of understanding what a normal volume consists of. And after awhile, I think people just get tired of asking.