hearing aid fuel cell

Hearing Aid Fuel Cells?

In a previous article, in discussing hearing aid power supplies, it was mentioned that depending on its design, a power supply (battery) may obtain its energy from different types of energy sources, including electrical energy transmission systems, energy storage devices such as batteries, and fuel cells.   Hearing aids have used storage batteries for many…

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A.G. Bell – Speech Riding on Light

A.G. Bell  – An Analog Man Inventing Speech Riding on Light: Part 2 Christopher Schweitzer, Ph.D.   In Part I of “Light ‘em up Mr. Bell: Li-Fi,” Alexander Graham Bell proposed speech riding on light as a means of communication. It was also wireless telecommunication, and in the 19th century! Bell believed his light-operated method…

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