yu could switch toys and use a crop of some kind instead, if used right far less noise than a paddle by far

as many closed doors as possible between you and them reduces noise, including a towel wedged at the bottom of the door to the room yur in

some music in your room perhaps may help

utilizeing postions and such that allow for spankings of the more intimate areas of your body, strikes to these places require far less force and noise to illeciet a very simular affect hehehe sometimes an even better one weg