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Hyundai Motor Develops Road Noise Active Noise Control Technology

Auto News - Published on Wed, 13 Nov 2019

Image Source: hyundaimotorgroup
Hyundai Motor Group announced the development of the world’s first Road Noise Active Noise Control system. The first ever system dramatically reduces noise within the cabin of a vehicle. RANC builds on the Group’s current Active Noise Control technology, which actively reduces noise by emitting soundwaves inverted to incoming noise. ANC is a software-driven technology that analyses the in-cabin sound to decrease engine and road noise, versus than the passive method of blocking noise through sound insulation.

The existing noise insulation method involved sound insulations and dynamic dampers, which not only increased weight but also failed to block the buzzing infrasound completely. In contrast, ANC utilizes much lighter parts like microphones and controllers to control the noise and reduces infrasound more efficiently. The technology is already available in some Hyundai Motor Group vehicles.

However, due to the limitations of noise measurement and analysis technology, the existing ANC was only able to be utilized when noise was constant and the occurrence of the noise predictable. The Group’s current ANC technology has been most commonly used to counteract constant engine noise. Given that it only takes about 0.009 second for road or engine noise to reach the passenger, the current technology was limited.

With the first-ever RANC technology, Hyundai Motor Group is able to greatly improve in-cabin quietness. The new system can analyze various types of noise in real-time and produce inverted soundwaves. For example, there are different types of road noises that the new technology can process, such as resonant sounds created between tires and wheels or rumble sounds coming up from the road.

Source :

Posted By : Arun Huidrom on Wed, 13 Nov 2019
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