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First all-digital road noise cancellation system developed by Hyundai and Analog Devices

Analog Devices and Hyundai Motor Company have collaborated on the automotive industry's first all-digital road noise cancellation system. The system uses Analog Device's Automotive Audio Bus (A2B) technology.

A2B is a high-bandwidth, bidirectional, digital audio bus. A2B is capable of transporting data and control information over a single, two-wire UTP cable. This reduces the system's cost, weight, and complexity of the cable and can be used in new and emerging applications including automotive, building technology, and consumer goods.

"As an early A2B adopter, we realized the potential of this technology for not only our Road-noise Active Noise Control (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."

Hyundai's RANC system dramatically reduces noise within the cabin of a vehicle. The system can analyze various types of noise in real time and produce noise-cancelling 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.

A2B reduces cabling weight by up to 75 percent and improves automotive fuel efficiency and total system costs. ADI's A2B is the industry's lowest latency, high-speed digital interconnect technology distributing audio and control data together with clock and power over a single, unshielded twisted-pair wire. Current deployment of automotive road noise cancellation systems has been constrained by the availability of a cost-effective, low latency networking technology that efficiently connects required input sensors to a central processing unit. ADI's A2B technology significantly reduces associated wiring harness cost and complexity found in traditional analog-based road noise cancellation system deployments.

Hyundai also intends to adopt ADI's A2B technology more broadly for its fundamental audio connectivity and infotainment applications across its automotive fleet.

Learn more about A2B technology here.

Source: Analog Devices

Published January 2020

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