Multi-link suspensions create multiple noise paths into the vehicle. While stiff bushings are often the best choice when trying to design a vehicle with great handling and cornering, they tend to allow more unwanted noise into the cabin. When combined with the universal trend toward wider, low-profile tires, the result is road noise transmitted through the structure of the vehicle, creating a ‘droning’ noise. There are many energy transmission paths through the suspension and structure that all contribute to the resulting noise. This noise is distracting and increases driver drowsiness.
HARMAN, together with Lotus Engineering, has created one of the most exciting advances in automotive acoustics: the RNC Road Noise Cancellation System. HARMAN RNC technology reduces unwanted road noise inside the car by generating anti-noise similar to the anti-noise created in noise-cancellation headphones. The result is a more comfortable ride, enabling OEMs to use lightweight chassis materials and thereby increase fuel mileage and reduce emissions.
- RNC helps create a peaceful, quiet interior for a relaxing atmosphere that is also ideal for enjoying your favorite music.
- RNC slows down the onset of driver fatigue by reducing the low-frequency droning noise in the car.
- HARMAN’s patented True Audio technology ensures that in-cabin audio remains unaffected by noise cancellation.
- RNC helps cancel low-frequency broadband noise that otherwise would be reduced by using heavy damping material. This material adds weight to the car, thereby increasing fuel consumption and CO2 emissions while at the same time compromising the car’s performance.