If it was a 2 1/2 inch revolver it was because the sound was closer. Most short barrel rifles and pistols sound loader.
I too doubt that anyone will have time to get prepared with hearing protection. You could just buy a pair of those rubber shooting plugs that go into the ear and have a valve that shuts when a loud sound goes off. They let you hear normally under most conditions and shut off incoming sound when you fire.
http://www.midwayusa.com/product/690...s-nrr-19db-tan
http://www.midwayusa.com/product/453...vc=subv1690766
Or you could just get a Class 3 sound suppressor and not wake up your neighbors, now that would be considerate.
Jim