Gear Technology Magazine
www.geartechnology.com/articles/28269

Shake, Rattle and Roll - Software and Gear Noise

June 27, 2018
By Matthew Jaster, Senior Editor

Some truth about gear noise: Electric motors compared to combustion engines are close to inaudible. For both electric and hybrid vehicles the engine noise that is covering the gear noise is gone, therefore, in low-speeds when tires and wind noise are low, the demands to the gears are much higher concerning noise.