Generator DB ratings
When comparing generators: #1 Are the posted db ratings at WOT, or at idle in eco mode? #2 Is there a uniform db rating standard that all manufacturers adhere to, or is each manufacturer ope...
Forum Discussion
A 1dB change in loudness is likely the smallest audible step that the average listener can detect, and an increase of 3dB most listeners perceive as slightly louder. Depending on the individual, a change of +6dB to +10dB can be perceived as twice as loud. Doubling the distance away from the sound source generally results in a 6 dB reduction in sound level. Adding an additional like sound source (two speakers in stereo or two like generators) will result in 3dB increase in sound level.
While the new inverter/pure sine wave/generators are relatively quiet compared to most generators 20 years ago and the contractor generators of today, they are not quiet, as in you don't notice them. You will hear one droning along from quite a distance away. One can significantly reduce the sound of the "quiet" new portables by making a hinged, collapsible, 3' x 3' four-sided box, open at the top and bottom, of 1/4" plywood glued to two layers of automotive Low-E, notched on the bottom near the intake side for air flow and cord exit. With a 50' 30 amp cord and the Honda EU3000 at full load one can get its sound down to around 42 dB at their site, which is pretty quiet for someone at the site. Not as quiet for anyone closer to the unit and one will still notice the sound. Ambient sound in a the out of doors is around 30 dB.
While the new inverter/pure sine wave/generators are relatively quiet compared to most generators 20 years ago and the contractor generators of today, they are not quiet, as in you don't notice them. You will hear one droning along from quite a distance away. One can significantly reduce the sound of the "quiet" new portables by making a hinged, collapsible, 3' x 3' four-sided box, open at the top and bottom, of 1/4" plywood glued to two layers of automotive Low-E, notched on the bottom near the intake side for air flow and cord exit. With a 50' 30 amp cord and the Honda EU3000 at full load one can get its sound down to around 42 dB at their site, which is pretty quiet for someone at the site. Not as quiet for anyone closer to the unit and one will still notice the sound. Ambient sound in a the out of doors is around 30 dB.
