I found out that my Honda Odyssey has a sub under that passenger seat that is a noise-canceler for the rumble I guess I would hear when the Variable Cylinder Management shuts down engine cylinders.

I think if your neighbor had a good mic, a preamp and a sub with a phase switch, he could quiet his place right down! smile

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::