Strange tone on my galaxy s5

[djar2166]

I've noticed a sound on my galaxy s5. Seems to have started about a month ago. I've checked all the sounds on the sound list and it is not on that list. Narrowing it down, it seems to happen if I turn on the WiFi and go to a search window. It is driving me nuts. My cell can be sitting on the table next to me and that thing tones out. Again, I have checked the sounds assigned to my cell, it is not one of them!

 

[B. Diddy]

Welcome to Android Central! Just to be sure -- does this go away if you turn off NFC?