Separate the ceiling joists from the floor joists (yes I know, extra framing). Mineral wool (Rockwool or Safe & Sound, etc) insulate both ceiling and floor and the garage walls. Use acoustic caulk between the studs and the sheetrock in the garage. If you are really concerned about sound you...
I was going to use something like this on a rebuilt extension cord...
https://www.amazon.com/gp/product/B08K8FB4KV/?tag=atomicindus08-20
these will probably need modification to get them in the tool handle.
A good electrical cable would be something like SOOW in a 14/3, a 12/3 would probably...