"The Remove Hidden Data add-in is a tool that you can use to remove personal or hidden data that might not be immediately apparent when you view the document in your Microsoft Office application, " says the instructions on Microsoft's website.
This was never really a play on hidden value on the pages of the L.A. Times, Chicago Tribune or Newsday that weren't apparent to long-time industry watchers.
Such "hidden" hearing loss, not evident in the audiogram (a test that measures hearing sensitivity), is also apparent in human listeners who experience persistent tinnitus, but otherwise normal sensitivity.