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geoffkait's picture
Last seen: 2 days 20 hours ago
Joined: Apr 29 2008 - 5:10am
Machina Dynamica's new isolation stand

We have a new product that is a reinvention of the sandbox isolation of yore. I am calling it the Bio Mikro G isolation stand. The Bio Mikro G employs virtually perfectly round microspheres of glass rather than sand for much better control of vibration and superior performance. The Bio Mikro G is 20x13 x2 inches. The Bio Mikro G will be suitable for isolating CD players, preamps, integrated amps, moderate size turntables, etc. Price $249. Our Baby Promethean Mini Isolators can be used on the top plate of the Bio Mikro G.

Geoff Kait
Machina Dynamica
Advanced Audio Concepts

Addendum, why do I call it Bio Mikro G?

Woodpecker explanation for Bio Mikro G

Woodpeckers hammer their beaks into trees at the astonishing rate of 18 to 22 times per second, subjecting their brains to deceleration forces of 1200 g with each strike. This is more than 100 times the g-force required to give a football player a concussion, according to research conducted by the NFL — when the Green Bay Packers and Pittsburgh Steelers meet in the Super Bowl on Sunday, players subjected to at least 98 g could be sidelined.

Sang-Hee Yoon and Sungmin Park of the University of California-Berkeley set out to learn how woodpeckers can survive such powerful deceleration forces. They found the birds' anatomy acts to protect their brains in four ways. Their beaks are hard but elastic; their skull bones are spongy; there's very little room for fluid between the skull and brain, cutting down on vibrations; and they have a special structure called the hyloid layer, attached to the woodpeckers' tongues to reduce vibration, New Scientist reports. Airplane black boxes can survive about 1,000 g.

The researchers came up with mechanical analogues for all these capabilities, and built a new type of shock-absorbing device involving glass beads embedded in a steel-encased aluminum cylinder. They pelted it with an airgun and found it protected its contents against 60,000 g, according to their paper, published in the journal Bioinspiration and Biomimetics.

To mimic the beak's strength and toughness, the researchers started with a steel case. To evenly distribute load and cut down on vibration, like the hyloid, they added a rubber layer. The thin layer of fluid was represented by a second metal shell, this one made of aluminum, and inside that they used closely packed 1-mm-diameter glass beads, to simulate the skull's sponginess. The electronic device was embedded in the beads.

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