[technology]
Active road noise cancellation
Broadband road noise control for real-world automotive cabins
Adaptive Road Noise Cancellation for real-world cabins
Road and structure-borne noise changes continuously with road surface, vehicle speed and operating conditions. Conventional passive treatment can reduce some of this noise, but adds weight and cannot adapt in real time.
ARNC uses vehicle reference signals, microphones and the cabin audio system to reduce unwanted low- and mid-frequency road noise around the listener.
ARNC uses vehicle reference signals, microphones and the cabin audio system to reduce unwanted low- and mid-frequency road noise around the listener.
Listener-Aware Road Noise Control
SPB Audio Lab’s ARNC technology combines real-time adaptive processing with virtual microphone control to create a quiet zone near the listener’s actual head position.
The architecture can adapt to head position, cabin geometry and available processing resources while using the vehicle’s existing audio path where the platform allows.
The architecture can adapt to head position, cabin geometry and available processing resources while using the vehicle’s existing audio path where the platform allows.
Key Features
Reduces road and structure-borne noise across a configurable low- and mid-frequency range.
Estimates acoustic error signals at target listening positions without requiring a physical microphone at every control point.
Positions the cancellation zone around the listener rather than at one fixed calibration location.
Supports quiet-zone adjustment using head-position or occupant-related information where available.
Scales processing, reference channels and output channels to the available DSP and vehicle architecture.
Supports measurement, calibration, tuning, quality control and in-vehicle validation.
AENC — Active Engine Noise Cancellation
Dynamic multi-order cancellation of engine and powertrain harmonics under transient RPM conditions
ARNC — Active Road Noise Cancellation
Broadband control of road and structure-borne noise with virtual microphones and listener-aware quiet-zone positioning
HVAC ANC — HVAC Noise Cancellation
Tonal and turbulent HVAC noise reduction using microphone references and the available cabin audio path