New Hyundai technology will save on noise isolationNovember 11, 2019
The company introduced a new system of active noise reduction
Hyundai has developed a new system of active noise reduction, which successfully fights against extraneous sounds penetrating the cabin when driving. Its sensors and computing unit detect and analyze signals faster, reducing the average noise level by three decibels.
The development of the RANC (Road Noise Active Noise Control) system and its commercialization took six years. Hyundai was helped in this by scientists from the Korea Institute of Advanced Technologies, which Harman employees joined in the adaptation phase to mass production. The company has patents in Korea and North America for the location of sensor systems and algorithms for selecting a signal for jamming.
Using the data of the accelerometer, the RANC block calculates the vibration load parameters, and the central computer analyzes the noise coming from the road. Calculation and transmission of a signal to a digital signal processor, which sends sound waves in antiphase through the speakers, takes 0.002 seconds. For comparison: the current system of active noise reduction requires 0.009 seconds. Moreover, the analysis takes place in real time separately for the driver, passenger and the second row of seats.
The average noise level is reduced by three decibels – the company says that it is half the value recorded in the car without RANC. In the future, they want to extend the technology to models with electric or hydrogen power plants. It will also help to reduce their mass by reducing the number of soundproof materials.
Hyundai previously announced the completion of the world’s first “smart” cruise control, which is based on machine learning methods. Such a system is capable of self-learning by dynamically analyzing behavioral scenarios.
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