Found this generator at Home Depot. "deal of the day"

riven1950 wrote:

A change of 4 dB is 1.32 times as loud or 32% louder but the sound quality is also important. Some sounds are more annoying than others measured at the same intensity.

Maybe I'm missing something here, but if it was 1.32% louder it would be 77.8DB. 63DB is actually 6.7% louder than 59DB.

Yes you are. Decibels are logarithmic. A change of 10 dB is twice as loud.