Hyundai Develops Road Noise Active Noise Control Tech

Hyundai has announced the development of a Road Noise Active Noise Control (RANC) system designed to dramatically reduce noise within a vehicle’s cabin.

The new system works by analysing various types of noise in real-time and produce inverted soundwaves to cancel out the incoming noise.

The system uses an acceleration sensor to calculate the vibration from the road to the car and the control computer analyses that noise. In just 0.002 of a second, the system analyses the sound and produces an inverted soundwave via a DSP (Digital Signal Processor).

Based on tests evaluating road surface, vehicle speed, and different seating positions, Hyundai says that the RANC was able to reduce in-cabin noise by 3dB and the company says that this can potentially lead to decreasing the amount of unsprung weight in a vehicle, because fewer sound-insulating parts and dampers will be required.

With whisper-quiet electric vehicles certain to play a big part in the future of mobility, in-cabin quietness has become an important factor for vehicle manufacturers.

Interior noise primarily comes from three sources: vehicle powertrain, road, and wind. There is almost no powertrain noise from electric and fuel cell electric vehicles, so quelling road and wind noise becomes even more imperative. Using the RANC can, Hyundai says, significantly reduce that noise and create a ‘serene cabin for future electric and fuel cell electric vehicles’.

The company says the technology will begin to be applied to an upcoming Genesis model.

Source: Motor Trader E-Magazine (Dec 2019/Jan 2020)

19 Dec 2019

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