If you don't already have the air tool you are looking at running such as ratchet, impact, drill, die grinder, you could look at the aircat brand of tools, they are very quiet compared to other brands. My 2 yr old will stay around when I run the aircat die grinder but will take off in a big hurry if I run my other one. Wouldn't something added on like this rather than designed into the tool reduce performance?