Analog Devices’ Digital Road Noise Cancellation System

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  • Its Automotive Audio Bus (A2B) can transmit high-speed, low latency control signals.
  • Hyundai’s RANC system is capable of reducing inside and outside vehicle noises.

Traditional analogue-based road noise cancellation system is expensive with respect to wiring harness cost. Analog Devices, Inc (ADI), a provider of analogue technology solutions, intends to bring this down, by collaborating with Hyundai Motor Company to launch the automotive industry’s first all-digital road noise cancellation system. This system will be leveraging Analogue Device’s Automotive Audio Bus (A2B) technology.

Low latency

The A2B is capable of reducing cabling weight by up to 75 per cent and, thus improve automotive fuel efficiency and total system costs. It is industry’s lowest latency, high-speed digital interconnect technology for distributing audio and control data together with clock and power over a single, unshielded twisted-pair wire.

Reduced on-road noise

Along with this, Hyundai’s RANC (Road-noise Active Noise Control) system significantly reduces noise within the cabin of a vehicle. The system can analyse various types of road noises, such as resonant sounds created between tires and wheels or rumble sounds coming up from the road and produce inverted soundwaves – in real-time.

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“As an early A2B adopter, we realized the potential of this technology for not only our RANC systems but also for other vehicle applications fundamental to passenger and driver experience,” said Dr. Kang-Duck Ih, Research Fellow, Hyundai. “The low latency guaranteed by A2B enabled us to implement this groundbreaking RANC technology and accelerate its deployment to mass production.”

“We have collaborated closely with Hyundai to architect its all-digital RANC system that leverages our A2B technology to reduce equipment cost, weight, and design complexity, and in turn, improve overall fuel efficiency – helping solve several challenges of the electronic RANC system,” said Patrick Morgan, Vice President, Automotive Electrification and Infotainment, Analog Devices. “ADI’s work with Hyundai demonstrates A2B’s increasing viability and further distinguishes Hyundai’s vehicles in today’s marketplace.”

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ADI’s collaboration with Hyundai underlines the growing importance of A2B for automotive manufacturers in wiring and latency-sensitive applications, including road noise cancellation, in-car communications and personalized audio or sound zones. Therefore, Hyundai has planned to further implement ADI’s A2B technology into its automotive fleet for audio connectivity and infotainment applications.


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