Active Noise Cancellation Operation
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The main components of the Active Noise Cancellation system are:
- 3 microphones in the vehicle headliner: one above each front seating position, and another above the right side of the second row seat.
- A discrete engine speed (RPM) signal from the engine control module to the amplifier
- Active Noise Cancellation electronics and software integrated into the audio amplifier
- the vehicle speaker system, connected to the amplifier, to output the desired cancellation frequencies
The Active Noise Cancellation system is operational under the following conditions:
- The amplifier has passed all self diagnostic checks
- All doors/liftgate are closed
- Battery voltage is between 9.5 V and 16 V
- The vehicle cabin temperature is less than 140°F (60°C)
- Engine speed is between 550 and 3000 RPM