Note: The Decibel (dB) Scale is used to quantify sound levels. Zero (0) dB is the quietest sound audible to a healthy human ear. Because it is a “logarithmic” rather than a linear scale, every increase of 3 dB represents a doubling of sound intensity. However, humans perceive sound to be twice as loud when there’s a difference of about 10 dB. So, as heard in this audio-visual demonstration, the 16 dB difference between the two mowers makes the diesel mower sound about THREE times louder than the electric mower. What this means in practical terms is that a Mean Green electric mower can barely be heard when it’s operating 30 to 40 feet away and can’t be heard at all when it’s operating more than a few hundred feet away or on the opposite side of a small building. The diesel mower on the other hand is so loud that it can easily be heard even when it’s operating many hundreds of feet away.