Ive been thinking about which would be the noisiest power tool out there used at guitar building. Since I only have a router and a hand drill I do not know how much noise the other ones can produce. Living on an building where if you knock at your door to hard neighbors start to complain, the noise thing would be an issue for a future builds. Id need to buy at least a drillpress (Im thinking how to take it to the 10th floor by the stairs and not let it to be seen by anybody!!!). For my (very limited) experience, routers are waaaaay more noisy than hand drills. but what about a drillpress (say a normal bit, sander attachment or safe t planer), different types of sanders, bandsaw or whatever tool you use.