If you want to reduce how audible you are outside your room you can add some sound dampening material to your walls and door and seal air cracks around your door. Those black spiked foam wall panels or heavy curtains are probably best for sound dampening, but something as simple and cheap as paper egg cartons on your walls will greatly reduce how much sound gets through.
I’ve been liking Magneto as well, but I hate his sound design. There’s nothing about it that tells you his powers have anything to do with magnetism or controlling metal. He sounds like he has generic fantasy psychic powers