Here's a scoop for Head-Case: Mead Killion (president of Etymotic) wrote this:
"The NSF presentation below is the largest single collection of misinformation our government has put out -- at least regarding hearing. Almost every sentence Steven Ambrose utters is exactly, precisely, the opposite of the known truth. Juergen Tonndorf would probably turn over in his grave to hear the idea that what matters was the source of sound rather than the sound pressure at the eardrum. Or that the eardrum vibration could be orders of magnitude greater than the vibration of the tiny earphone diaphragm that generated the sound.
Centuries of scientific discovery overturned in one U.S. sponsored video. "
This is going to be an interesting developement to watch unfold.
Here's my story on it.
My meter is tending towards balony at the moment, but I'm keeping an open mind.