Dynamic heads using bamboo and opal analogue. Free Technical Library News

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Dynamic heads using bamboo and opal analogue

09.03.2014

Panasonic announced the creation of a new dynamic head, the diaphragm of which is made of a material using the so-called "plant opals" - phytoliths, microscopic fragments of amorphous silicon dioxide (SiO2 nH2O), which accumulate during the life of bamboo and many other plants and fungi.

The material has a hardness of 5-6,5 on the Mohs scale, which corresponds to such a mineral as opal (see photo below). Basically, opal has the same chemical formula. The size of phytoliths can be from several hundred micrometers to several micrometers.

In the manufacture of diffusers, in addition to directly phytoliths, bamboo fibers, bamboo charcoal and resin are also used. Thanks to the use of phytoliths, the developers were able to achieve an increase in acoustic velocity by 10%, flexural elasticity by 40% and a decrease in internal loss by 20%. The comparison was made with other Panasonic products made with bamboo materials, but without the addition of phytoliths.

It is worth noting that bamboo was chosen by the company due to the extraordinary growth rate of this grass (up to 0,5-1 m per day), which guarantees the possibility of using this material without harming the environment.

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The company says that the authors themselves asked for this, especially those who like to create long works. Theoretically, this model will allow them to be paid more fairly.

After the user of the Kindle device opens the book, the system will start keeping track, if the time spent on each page is enough for a person to read the text on it, the page will be counted and paid to the author.

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