[technology]
Active Engine Noise cancellation
Dynamic multi-order cancellation under transient RPM
Real-time engine-order control for reducing tonal engine and powertrain noise in automotive cabins
Engine and powertrain harmonics shift continuously with RPM, particularly during acceleration and other transient operating conditions.
AENC generates controlled anti-noise through the vehicle audio system to reduce selected tonal components in the cabin as engine speed changes.
AENC generates controlled anti-noise through the vehicle audio system to reduce selected tonal components in the cabin as engine speed changes.
Dissonix™
Patented method
Dynamic engine-order control
Dissonix™ is SPB Audio Lab’s AENC technology for dynamic multi-order cancellation. It prioritizes the strongest engine and powertrain harmonics within the available compute budget.
The system can operate using an RPM reference alone or together with optional accelerometer and microphone signals.
The system can operate using an RPM reference alone or together with optional accelerometer and microphone signals.
Key Features
Tracks and reduces multiple engine orders as RPM changes.
Prioritizes the strongest tonal components within the available processing budget.
Maintains engine-order control during acceleration and other changing operating conditions.
Supports RPM-only operation or sensor-assisted configurations using accelerometers and microphones.
Can operate as a standalone AENC solution or together with an ARNC stack.
Supports calibration, tuning and in-vehicle validation for automotive programs.
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