Room was nice, carpet's worn. Somehow after midnig...

Room was nice, carpet's worn. Somehow after midnight till dawn someone was ringing our door bell 4 times and everytime waking everybody up. I don't know if someone was bored and pranking us or have something bad in mind. Anyway we called assistance and we were told it is the next doors doorbell. How the heck was it so loud enough to wake us up?