Cars & Driving
- noun reduction, especially of noise or emissions
- The sound reduction process utilizing a sound-absorbing system.
- A reduction over time or distance in a physical quantity, such as amplitude or energy. For instance, a decrease in the amplitude of a wave as it propagates through a medium. It may occur naturally, or an attenuator may be employed.
- noun a reduction in the effect or strength of something such as a virus, either because of environmental conditions or as a result of a laboratory procedure