see what you need to do is go down to the beach and get yourself some sand
fill a couple of socks with the sand and tie them at the open end
wait until your neighbours begin their noisy sex, then kick their door in and start beating both of them with the sand filled socks
while you are beating them, start shouting "MAKE SOME MORE NOISE NOW BITCH! MAKE SOME MORE NOISE NOW BITCH!"
thereafter, your neighbours will avoid noisy sex and you will get a good nights sleep
hope this helps