Category Archive 'MIT'

11 Mar 2015

Why Do Violins Have F-Holes?

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BoingBoing reports that a team from MIT has figured it out.

Why did violins slowly develop f-shaped sound-holes? Because it makes them more acoustically powerful than their ancestors, which had holes shaped liked a circle — as a team of MIT scientists recently concluded.

Back in the the 10th century, the makers of European stringed-instruments were building “fitheles” — the ancestor of the modern violin — but they used round holes. By the 12th century, they’d started using half-moon shapes, and a century later they’d refined it to a sort of C-shaped hole. Then in the 15th century they pioneered little circles at the ends of the holes, which, by the 17th century, had become the modern f-shaped hole.

A team of MIT scientists recently wondered why the shape had evolved that way. After crunching the math and doing some experiments, figured it out: The f-shape turns out to have physics that push a lot more air than a circular hole, making the violin’s output dramatically more powerful. From the Economist:

    “The answer, arrived at after several pages of advanced mathematics, and confirmed by experiment, is that holes’ sound-amplification properties depend not on their areas but on the lengths of their peripheries. They showed how the shape of the hole varied over the centuries, and how that affected its power output. The final Cremonese design had twice the sonic power of the circular holes of the fithele.”

Read the whole thing.

06 Apr 2006

Stealing the Cannon

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There is a tradition at Caltech that a Spanish-American War cannon, the property of Fleming House (one of its student residental houses), is fired to mark a number of important events.

Twenty years ago, students from Caltech’s in-state rival Harvey Mudd stole the Fleming House cannon, gaining national news coverage, and undying glory, for their feat. The cannon was returned to Caltech after about two months.

It was anticipated that the current generation of Harvey Mudd students would try to repeat the theft of the Caltech Cannon on the 20th Anniversary of the original heist, but more enterprising rivals of Caltech from MIT struck first.

The cannon is in Cambridge, Massachusetts, and the web-site of a bogus moving company, “Howe & Ser” triumphantly displays the cannon now sporting an MIT class ring.

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