For the design fans in the crowd with time to kill...
There seems to be a lot of interest in design topics at the moment. I thought I'd share some ideas about designing classic sound holes here. These slide shows are more or less ones that I presented at the AFVBM meeting at U.C. Berkeley in May and the VSA in Cleveland in November. As usual, please forgive the fact that they are not rehearsed or edited.
I'm happy to say that there are some irrational numbers included for Torbjörn.
https://www.youtube.com/watch?v=rwtAjEJTouE
I thought the f holes on this instrument were short, stubby and rough compared to some of the ones we've been looking at. I don't mind the way they look...but it's like comparing a bulldog to a greyhound. I find both breeds appealing, but vastly different. http://www.ebay.ca/itm/FANTASTIC-OLD-ANTIQUE-18TH-CENTURY-VIOLIN-MADE-CIRCA-1760-A-BEAUTY-/251910061351?pt=LH_DefaultDomain_0&hash=item3aa7027d27 The ad describes them as:
Secondly...is an unknown instrument (with a weak sound from the description) worth $12000 + USD?
Summary: Power efficiency in the violin
Full article: The evolution of air resonance power efficiency in the violin and its ancestors
The abstract from the article: