How To Make A Portable Generator Quiet. Operate the generator in soundproof enclosures; Set it on rubber feet or a platform;
Make sure to install your generator away from your home or location. Try moving the generator as far from your rv and the other rigs around you to see if that makes things quiet enough to get some rest. If you have a standard generator and you feel that it makes a lot of noise, you may consider upgrading to a portable, inverter generator.
There are many ways to reduce the noise of your generator to some degree such as building a sound wall around the generator, adding a muffler or adding padding beneath the generator, etc.
What you can do is encase the stand or legs in rubber. Extension cords help make this possible, as does a lot of open space, making boondocking in the wilderness the perfect opportunity to give this a try. Trying to learn how to quiet a generator? By setting sheets of plywood around the generator, you can reduce the noise level by at least 10 decibels.