After receiving many suggestions and conversing with Mark at Command Online, he verified that the objects I was examining were, in fact, the microphones located in the headliner over the sun visors. Provided me with many troubleshooting recommendations to assist me in my endeavours. Exceptional service and counsel, since he could have simply said, "we cannot assist unless you are willing to visit," instead he generously invested time in addressing my enquiries!
To access the rear of the microphone, remove the vanity mirror light, then apply pressure from both the front and back to elevate the little grille enough for fingernail insertion. Loosen the grill carefully and gradually, as it may detach and become irretrievable; ensure that your door is closed! Initially, inspect the grill for a rubber bung; extract it using a pin and pry it out from both sides. Clean it, then examine the grill for a tiny plastic filter and shake it out.
Insert your finger into the rear of the microphone body, use your thumb to grip the front grill, and snap it back into place. Perform the same procedure on the passenger side. Test call, very clear once again. It is evident that a change has occurred, however this resolves the issue and restores proper functionality. I already adjusted the Transmission volume in the menu, and when testing it again during the call, it was accurate.
Joyful days.