All of my springer types have been loud, I use hearing protection. The quietest are the multi-pump types like the Daisy 901 and the Crosman 2100. For indoor shooting I use 2-3 pumps, and this is done in an apartment. For pest control on birds I have found 7 pumps to be just right and I remain well away from windows to allow the room to absorb the noise, on larger pests I use a full ten pumps, and it starts to get loud, not as bad as a springer though. Gamo came out with a barrel obsorber setup to dampen the sound, I have no experience with those though.
