This from Nbc News:
A piercing noise that plagued an Oregon city earlier this year, drawing comparisons to “Satan’s teakettle” and hypothesized to be everything from a defective water valve to aliens or a signal for the end of times, stopped as suddenly as it started. In the silence left behind, it appears the mystery may live on forever.
The town of 22,000 or so was put on the map this year because of the now famous noise. A noise gay suddenly has vanished from the ears..
Originally there were allegations that teenagers were playing pranks. Other world explanations soon became linked to the sounds.
With all the explanations rendered, no one could ever explain fully what was being heard.
And now maybe no one will.
The noise suddenly ceases…
I smell a future in Hollywood for the Forest Grove mystery..