You’ll need to clarify. Is it excessive background noise that YOU hear from your end while you’re on the phone with your OPN muted? Or is it excessive background noise your other party complains about hearing from their end while they’re talking to you on the phone?
If the later, when it’s probably because you’re in a noisy place and the ConnectClip mic just picks up all the sounds around you for the other party to hear. You can probably adjust the sensitivity of the ConnectClip remote mic to a lower value to help in this case.
If it’s the earlier, then you’ll need to clarify further if it’s the excessive background noise for sounds around you, or if it’s excessive background noise from the other end where the other party is at that you’re hearing through their phone’s mic. If it’s the earlier, then you can mute the mic on the OPN manually, or adjust the relative volume of the OPN mic relative to the volume of the remote mic in the Genie 2 ConnectClip setting. If it’s the later (noise from your other party’s end) then I don’t think you can do anything on your end to clean it up, except to tell your caller to go to a more quiet area to talk to you.