Absolutissimo! You can do nothing, enjoy life and make sure that it is not you who is making all that noise, scolding your child for being naughty. He is loud? Great! Lung capasity is large, healthy sign!
Hi aallard! Do what I've done when I had to take the bus when my kids were younger: Take a walkman with you and let your child use it. Make it mandatory, not an option that he/she puts it on. This is very easy to do, they love music! And for the mental drama of everyone looking at you, I know this can be more than a drag. Just have yourself a book, iPod/walkman to keep your attention away from the distractions around you. This can be a part of a safety plan, while riding the train with your child. Take Care!
Anyone who is a parent has been through something like that in their lives. So if they are staring, maybe they are remembering those days. I always pack a fun bag for my kids when we go on trips which include things like books, coloring books, toys, etc. I also sing songs and play word type of games with them. Reminding him quietly may also help for a bit. I know that he's just one but some of those ideas will still work for him. Nothing will fix it for a great length of time. Enjoy your healthy, curious boy!