Apparently we haven't replaced all the broken radio cords....or else one of the ones we have replaced has now gone on the fritz...because today at work, my manager had a bad radio cord.
So I was hearing this soft popping/knocking noise like someone was bumping into something or knocking on something and gaaaaah the noise was getting on my nerves. 
Getting enough on my nerves that I was getting a headache behind my right eye because the muscles in my shoulder and neck were tensing up.

So I took action. 
And had my manager replace his cord, which thankfully stopped the knocking over the radios in my ear. 
I then went and grabbed an Excedrin so I could head off the headache and keep it from getting worse. 
Which seems to have worked. 
So yay! :D