Ive had cats for nearly twenty years and can honestly say I dont hear a thing during the night but when my partner moved in he spent many restless nights coming downstairs to see what all the noise was about....hes been here nearly two years now and only just getting used to it. Still has the odd night when he wakes up thinking there is a herd of elephants downstairs and we only have one cat at he moment!

Think you get used to the strange noises in time and just sleep through them.