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79609e0f4b0c667cd1116844fbb64b63
2010-10-12 22:50:16

'HATS' off to the National Physical Laboratory for innovation in sound measurementScientists at the UK's National Physical Laboratory (NPL) have developed a means of representing a 3D model ear, to help redefine the standard for a pinna simulator (the pinna is the outer part of the ear) "“ used to measure sound in the way we perceive it.The nature of human hearing is heavily dependent on the shape of the head and torso, and their interaction with sound reaching the ears allows for the...


Latest Pinna Reference Libraries

Noble Pen Shell, Pinna Nobilis
2013-04-25 16:25:11

The Noble Pen Shell, Pinna Nobilis, is a species of large saltwater clam, a marine bivalve mollusk belonging to the family Pinnidae. This bivalve shell can be as large as almost 3 feet in length, and the shape is somewhat variable. Like all pen shells, it is quite fragile. It attaches itself to rocks using a strong byssus made up of many silk like hairs. These are fibers that are secreted by the animal. Brilliant mother of pearl lines the inside of the shell. This species is native to...

Amber Pen Shell, Pinna Carnea
2013-04-25 16:13:01

The Amber Pen Shell, Pinna Carnea, is a species of bivalve mollusk belonging to the family Pinnidae. It can be found in Caribbean waters, ranging from southern Florida to the West Indies and Bermuda. The amber pen shell has a pair of long, thin, and translucent valves and is triangular, fan, or wedge shaped, with a point at one end and a curved and ragged end at the other extremity. The hinge is along the straight side. It has the potential to grow to about 16 inches long though it usually...

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Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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