DS is quite loud, in fact very loud. DH and I didn't really realise as we hear it all the time but on Saturday in the supermarket dh forgot something and had to go halfway down the supermarket to get it while I was at the till and he could hear ds all the time, and ds wasn't even being particularly loud (by his standards).
We would like to teach him that there are times to talk quietly or to be quiet (like in church) but I don't know how. How did you teach yours?