Well, I'm not an expert on suppressors or decibels but I will be glad to give you an opinion. Suppressors suppress, not eliminate the sound of a shot being fired. Depending on the design of the suppressor, the amount of the gas being created and the length of the barrel, it may or may not take the sound to below a level that can do damage to the ears. Many just don't want to take the chance. If I'm hunting, I probably wouldn't use hearing protection. If I am at the range, I will use hearing protection. If you use a suppressor when around other people, they will appreciate it. Whether they say so or not.
