Sunday, December 8, 2019
Hyundai Motor Develops Industry's First Technology to Reduce Road Noises
New Technology Reduces Noises by 3 db
Hyundai Motor Develops Industry's First Technology to Reduce Road Noises
  • By Michael Herh
  • November 12, 2019, 11:08
Share articles

RANC technology significantly prunes noises by analyzing various noises from road surfaces in real time and generating an opposite frequency.
RANC technology significantly reduces noises by analyzing various noises from road surfaces in real time and offsetting them with anti-phase sound waves.

Hyundai Motor Group has developed the industry's first technology that can greatly reduce road noises.

The automaker announced on Nov. 11 that it will apply the new technology, dubbed Road-noise Active Noise Control (RANC), to new Genesis models.

RANC analyzes noises from roads in real time and generate anti-phase sound waves that offset them. The Passive Noise Blocking System used in the past increases the weight of a car and reduces the car’s fuel efficiency as it uses sound insulation materials and dynamic dampers. In addition, the system does not block low-frequency noises completely.

However, RANC can block low-frequency noises while using relatively light components such as microphones. It takes only 0.002 seconds for an RANC system to analyze noises to generate anti-phase sound waves. This makes it possible to effectively block irregular road noises occurring simultaneously.

After six years of development, Hyundai Motor Group has succeeded in mass-producing an RANC device. In particular, in the early development stage, the motor group carried out the project in cooperation with the Korea Advanced Institute of Science and Technology and private companies. In the volume production stage, it cooperated with Harman, a global leader in audio systems for cars, to enhance the quality of its new product.

This new technology can reduce noises by about 3 dB. This reduces indoor noise energy by half compared to other technologies so anyone can feel a noise reduction. Hyundai Motor anticipated that the development of RANC technology would enable the reduction of various and irregular road noises, thus realizing the quiet cabin of a car. In addition, hydrogen electric cars and electric cars have little powertrain noises, so road noises will be relatively stronger inside them. Therefore, the application of RANC technology will be even more effective in reducing noises inside those cars.