What Advances in Technology Allowed for the Invention of the EarLens Hearing Aid?

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You probably couldn't have done this 10 years ago. You now have better batteries and to drive the thing, you have better sore cells or micro photo detectors in this case, you have more efficient micro motors and it's amazing that you can do this because most people think you couldn't do it, and the reason you can do it, it takes so little energy to hit the threshold of hearing, if you move the eardrum the diameter of a hydrogen atom.

You can hear that sound. If the eardrum moves one micron, that's very little alright. That is 114db and that's like standing right next to a jet engine. So there's enough energy and the full time suiting the photo receptor to both give it a signal how to vibrate and the power to vibrate it.