To better understand the origins of noise, we need to think about how the rotation movement takes place. When a stepper motor performs a step, it does not stop immediately but continues to move ...

As engine and airframe makers wrestle with growing demands for quieter aircraft operations around airports, Boeing and NASA have tested an improved engine nacelle liner that offers lower noise as well ...

Research shows that fitting tires with very low rolling resistance, combined with the right road surfacing, can provide just as much noise reduction as traditional noise barriers. Research shows that ...