If you live in a neighborhood where there are a lot of senior citizens around, you might ask them to turn their hearing aides off. I regularly/sometimes/often (depending on who you talk to) fire up an engine on my patio. I wear hearing aides in both ears. I have to take them out. But my neighbors, who don't have the option of removing their hearing have to contend with the 'noise.'

I think they tolerate me because I am always willing to lend a hand, a tool, fix something, or welcome them in. Otherwise my butt might be red from all the kicking.

But it's the same with my router table, or table saw, chop saw, or any of the other power tools. Just as Bruce says, it's a comforting hum to me, but it can be a pain to the neighbors. Everytime I think of the noise, I'm reminded of the commercial where the guy is awakened by the neighbor hammering. In the commercial he goes over and shows Mr. Hammer how quiet and easy this glue product is. At the end of the commercial he grabs the hammer and glues it to the ceiling.

I wouldn't want my planes up there. Unless they are flying.