Blue genny guy did the unthinkable!

MEXICOWANDERER wrote:


The BEST portable generator sound suppressant is pyramid soft foam about four inches in depth. Making a collapsible four sided enclosure would chop emission 50% db wise. On big boats I built, extremely expensive suppressor motor mounts chopped noise level by an astonishing amount.

I don't think that's the right formula for the smaller generators. I experimented around with a big muffler on the exhaust, an enclosure, and concluded that the bulk of the noise comes from the cooling air exhaust. So I think a nice enclosure that lets the cooling air flow freely out won't help much. Baffles to muffle the cooling air might do the trick, making the enclosure bigger in the process. I have 2 comparisons to offer. With the eu2000i vs. quieter eu3000i, the 3000i's engine turns slower, has a better engine power to electrical power ratio, and has more overall mass. Another comparison is the eu2000i to the *really* quiet ex650. The ex650 produces one-third the power of the eu2000i with the same approximate overall size and weight, and its engine turns slower. We want a lot of power out of small, lightweight, and quiet generators. Each of those goals works against the others.