Hi All.
One way to help quite down a Built-ion Generator, is to use a Ven-Turi System on your Generator. They will quite it down by quite, and also carry the Carbon Monixide over and above the Motorhomes roof line on most Motorhomes.
Our Motorhome runs at 36000 rpm no matter what the load is. Its just the name orf the beast. But that Ven-turi Systems makes so we hardly hear it inside our Motorhome when it running.
Of coarse, if I want quitter, I can use our "Twin Hondas, EU2000i's", "Paralla Kit" with the "Extended Run Tank", then it will adjust to the load put on it. Our Hondas, we don't even notice them while running while we are in the Motorhome.
Good Luck. Happy Travels, Dan & Jill & our two "Yorkie Kids" who love to Travel as much as we do.