Help needed!

[Mikea7680]

I was cleaning the rear window of my GT500 and noticed this where it looks like something was not installed or fell out. Anyone know what goes here? It’s located in the rear, center of the headliner. B

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[Melmark93]

I was cleaning the rear window of my GT500 and noticed this where it looks like something was not installed or fell out. Anyone know what goes here? It’s located in the rear, center of the headliner. B

It should be covered by a round 1" black grill with a diamond pattern. Looks like it's a microphone, but I'm not sure why it's back there unless it's part of the system that pipes engine sounds into the audio????? I'd hunt around in the seat creases or under the seats. I found several trim pieces laying around that had fallen off.

 

[Snoopy49]

Your missing the noise canceling microphone.

ANC (if equipped)
The Automatic Noise Control (ANC) feature reduces the level of occasional low frequency engine noises which compete with audio system playback. The DACMC, built in to the ACM, determines the noise frequency to be canceled from the sound present inside the vehicle and by using engine data from the PCM.
While the engine is running, the ANC microphones monitor undesired noise in the passenger compartment. The microphones transmit this noise as analog signals to the DACMC inside the ACM. The signals are processed to create an inverted phase sound wave with the same amplitude as the original sound. This noise-canceling sound created by the DACMC is transmitted internally to the ACM outputs and externally to the DSP module over 4 twisted pair circuits. The final output by the ACM and the DSP is sent as fluctuating AC voltage to the speakers.

 

[Mikea7680]

Your missing the noise canceling microphone.

ANC (if equipped)
The Automatic Noise Control (ANC) feature reduces the level of occasional low frequency engine noises which compete with audio system playback. The DACMC, built in to the ACM, determines the noise frequency to be canceled from the sound present inside the vehicle and by using engine data from the PCM.
While the engine is running, the ANC microphones monitor undesired noise in the passenger compartment. The microphones transmit this noise as analog signals to the DACMC inside the ACM. The signals are processed to create an inverted phase sound wave with the same amplitude as the original sound. This noise-canceling sound created by the DACMC is transmitted internally to the ACM outputs and externally to the DSP module over 4 twisted pair circuits. The final output by the ACM and the DSP is sent as fluctuating AC voltage to the speakers.

Your missing the noise canceling microphone.

ANC (if equipped)
The Automatic Noise Control (ANC) feature reduces the level of occasional low frequency engine noises which compete with audio system playback. The DACMC, built in to the ACM, determines the noise frequency to be canceled from the sound present inside the vehicle and by using engine data from the PCM.
While the engine is running, the ANC microphones monitor undesired noise in the passenger compartment. The microphones transmit this noise as analog signals to the DACMC inside the ACM. The signals are processed to create an inverted phase sound wave with the same amplitude as the original sound. This noise-canceling sound created by the DACMC is transmitted internally to the ACM outputs and externally to the DSP module over 4 twisted pair circuits. The final output by the ACM and the DSP is sent as fluctuating AC voltage to the speakers.

Thanks very much!

 

[gfcobra04]

If you open the windows does that turn the noise canceling off?

 

[Rapid Red]

If you open the windows does that turn the noise canceling off?

Sort of LMAO .....

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