Asahi Kasei Microdevices (AKM) has recently signed a license deal with Silentium for Active Road Noise Cancellation (ARNC) in motor vehicles.
Silentium’s Quiet Bubble software technology is integrated into AKM audio speech processors and is offered worldwide.
Delivery of samples is planned for the fourth quarter of 2022.
ARNC technology reduces road noise in milliseconds, ensuring a comfortable driving experience for vehicle occupants.
“Electrification has presented automakers with unexpected challenges, ranging from safety to increased cost to driver comfort,” comments Naoyuki Kurita, Chief Marketing Officer at AKM “Uncomfortably loud, the road noise inside the vehicle is perceived compared to a combustion engine. Should more autonomously driving automobiles to be on the road shortly, this problem will increase further.”
The collaboration takes ARNC technology to a new level by combining AKM expertise in low-latency hardware components and Silentium’s expertise in noise-cancellation software.
The solution offered by both companies optimizes the control signal path from the reference sensors to the speakers to achieve high-speed transmission of vehicle signals and low-latency algorithm processing.
It does this by optimizing certain components of AKM analog-to-digital converter (ADC) so that the measured vehicle signals are quickly forwarded to the company’s digital signal processor (DSP), which houses the low-latency Quiet Bubble™ Silentium software is.
Additional latency reductions can be achieved from the vehicle acoustics side through the use of near-field speakers in the headrest or other locations close to the passenger’s head.
Because all hardware, software, and acoustics are made up of low-latency paths, this solution delivers broadband in-vehicle noise-cancelling performance comparable to premium noise-cancelling headphones.
“The shift to plug-in hybrid and battery electric vehicles is having a significant and lasting impact on vehicle interiors. Noise, such as that from tires, becomes much more prominent. Reducing this unwanted noise is essential for a relaxed, focused experience and therefore a safer driving experience. AKM’s advanced IC products, which combine cost-effective signal processing with Silentium’s state-of-the-art proprietary broadband acoustic technology, make quieter vehicle interiors available and affordable for every vehicle user,” concludes Anthony Manias, Head of Automotive at Silentium.