2019 RAM 2500 Owner’s Manual — ACTIVE NOISE CANCELLATION

Your vehicle is equipped with an Active Noise Cancellation System. This system is designed to address exhaust and engine noise. The system relies on four microphones embedded in the headliner, which monitor exhaust and engine noise, and assists an onboard frequency generator, which creates counteracting sound waves in the audio system’s speakers. This helps keep the vehicle quiet at idle and during drive.