1stgenfarmboy wrote:
I built a quiet box many years ago for a friend, I used egg foam on all sides and put some furnace filters on the top, I installed a small fan to run off the genny for cooling, as well as a good small car muffler, I made the sides twice as tall as the ganny was.
It was alot quieter and made it OK to be within 50 ft of it, however this is big and bulky and not very practical for RV use, and it will still make your camping neighbors want you gone.
It would be good for your home back up genny.
With the high sides directing the noise skyward probably was the most help. It is difficult to absorb the sound so a simple folding structure for directing sound might be something for the inventors on here.