pasting from the other Forum (F150):
The F150 only has ENE (engine noise enhancement) aka ESE (engine sound enhancement) versus ANC (advance noise cancellation). They are basically the opposite of each other.
ESE - 2.7L GTDI And 3.5L GTDI With Satellite Radio Only
ESE is an audio system feature that enhances certain engine tones typically induced under wide open throttle or heavy part-throttle conditions. The system uses a DACMC (contained within the ACM) and the audio system speakers.
The DACMC determines the engine tone to enhance based upon engine rotation speed data, engine torque data, and accelerator pedal position data from the PCM. The data from the PCM is processed and converted into an analog audio signal, transmitted to the DACMC internal tone generator, and output by the ACM to the LHF and RHF door midwoofer speakers as fluctuating AC voltage.
The ESE feature can be disabled (or re-enabled after disabling) through the use of programmable parameters and a diagnostic scan tool. For more information,
Refer to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).
See Module Configuration and Parameter Chart.
[or similarly]
Here is how ANC works in vehicles equipped with it (pulled from 16 Edge Service Manual):
ANC
ANC is an audio system feature that eliminates a certain range of low frequency engine noise within the passenger compartment typically induced under wide open throttle or heavy part-throttle conditions. The system uses 3 microphones, a DACMC (contained within the ACM), and the audio system speakers. The DACMC determines the noise frequency to be canceled based upon engine rotation speed data, engine torque data, and accelerator pedal position data from the PCM, as well as microphone input signals.
The ANC microphones are located in the headliner and monitor the engine noise resonating in the passenger compartment. The microphones transmit this noise as analog signals to the DACMC (contained within the ACM), where they are converted into digital signals by the integrated analog/digital converter. The digital signals are processed and an inverted phase sound wave with the same amplitude as the original sound is created. This new sound is converted into an analog audio signal, transmitted to the DACMC internal tone generator, and output by the ACM to the audio DSP module as fluctuating AC voltage. The audio DSP module sends the signal to the LHF door speaker, RHF door speaker, and subwoofer speaker as fluctuating AC voltage.
