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artificial ear

12.01.2006

American engineers have created an artificial hearing device.

Every mammal has a cochlea in its middle ear, a cunningly curved organ filled with fluid and equipped with nerve endings. It recognizes the vibrations of the ossicles of the front ear and prepares an electrical signal that goes to the brain.

The artificial snail was created by Karl Grosz of the University of Michigan and his student Robert White with the support of the National Science Foundation (USA). Its main advantage is that all parts can be made using the same methods that microchips are grown, that is, mass production methods, which means that their cost will not be high at all.

So, a microelectromechanical snail consists of a piece of hard glass in which a channel is etched. Silicone oil is poured into this channel, and a cone-shaped silicon nitride membrane is located on top. Its narrow part catches high-frequency vibrations, and its wide part catches low-frequency vibrations. Another nitride membrane replaces the stirrup, a special bone in the mammalian ear.

As tests have shown, the device is able to recognize signals in the range of 4-2 kHz, which is a significant part of the range of our ear - from 35 Hz to 20 kHz.

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In the United States, the military came up with and tested a new tactic for using combat drones.

The tests took place at the Dugway Proving Ground near Salt Lake City, Utah, as part of the EDGE22 exercise, which involved the Future Vertical Lift cross-functional team and nearly 20 divisions and organizations from around the world. The military has been gathering for the second year to try out new tactics and technologies related to vertical takeoff devices.

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