Humming, hypnotic road noise, which is low-frequency broadband sound, transmits from road surfaces into the vehicle along through the tires, suspension and body components. Without combustion engines to mask it, road noise is more perceptible in electric vehicles.
However, sound-dampening materials can be heavy and costly, and earlier active noise cancellation (ANC) systems, due to their complex wire harnesses and the material they carry, are less efficient and less economical than desired.
Additionally, automotive applications leave sensors and sound-dampening systems vulnerable to a variety of harsh environmental factors, like water, dust and rocks, which can damage the system.

Pioneering a new trend in the luxury electric vehicle category, Molex has created Road Noise Cancellation (RNC) Sensors, utilizing A2B technology paired with a sensing element that captures sound waves, enabling a reduction of road-based noise a combustion engine would typically mask. RNC Sensors capture a sound wave as vehicle chassis vibration is detected and transfer it to the processing unit, which generates a cancellation wave form to the sound inside the vehicle while traveling on the road.

Molex RNC Sensors capture vibration energy from the suspension into the chassis early for optimal cancellation timing, at a lower cost than other noise cancellation systems.

  • Daisy-chained sensors, eliminating the need for heavier materials
  • Less time between the sensor receiving vibrations and sending signals to the module
  • An IP6K9K enclosure, protecting the sensors from harsh automotive environments
  • Fifty percent space savings with the Molex Sealed Mini50 Connector interface


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