Then you move it to the hot water heater and harmonize that.
Home stereo system would be next,
Lawn mower / blower / edger / weedeater. (have them all running at idle by the garage door with the harmonizer moving from 1 to another with a small flatblade screwdriver)
You get the idea.
These all have worked for me over the 32 years and counting that my wife has been allowing.... yes allowing me to put on a show to entertain her, thinking I was actually getting away with something.
But honey.... we.............we NEED this !