Light sleeper!

What would you get for your babies room if they’re a light sleeper? I have 3 kids under 5 who run around lol and my baby gets easily woken up. He has a fan going for noise, wondering if there is anything else you guys recommend? I don’t like those heartbeat kind of sound machines lol, I don’t think he likes it either. I’ve always used the fan, I tried the heartbeat sound kind & music no good for him. lol