"holographic interferometry" images of stringed instruments

[morgan]

Found this on the BBC... Beautiful images detailing exactly how and where soundboards vibrate using a fairly novel technique (or at least new to me).

From the article:

"Researchers at Cardiff University reporting at the Acoustical Society of America meeting have presented striking images of stringed instruments made using "holographic interferometry", which allows them to visualise precisely how and where the soundboards of instruments vibrate.

First, a laser beam is scattered off the instrument when it is still. That pattern, along with another laser beam, are cast back onto the instrument as it is actively vibrated. The contour lines appear where tiny movements of the soundboard - less than a millionth of a metre - cause interference between the two beams."

http://www.bbc.co.uk/news/science-environment-13573631

Takes a lot of the guesswork out of tops when you can see things like this in such precise detail.

[Lillian]

That was interesting. Thanks for posting the link.