How can i turn off noise reduction

[AC Question]

The second mic on the top of the phone is for noise reduction/cancellation but it degrades voice quality for the receiving party.
Most phones have toggle to switch off. I cannot find one in the S7A setings

 

[jimd1050]

I've got the Full S7 Active Manual on my PC and I just did a search on that and there's NOTHING! Looks like this guy doesn't have it...