...It isn't about the sound level it is about the perceived sound level! I own a Honda eu3000 is generator that we use with our Airstream when we wander off the grid. It is the quietest of any generator I have ever found. The noise is still grating! At 49 decibels it is not loud it is simply not my favorite sound. When you drop to the smaller 1000 and 2000 watt units the sound is much worse. This coming from a guy who listens to engines on YouTube no less. I see no redeeming qualities for these things on a sailboat. I will happily listen to a diesel generator though...
Bruce