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Interesting article
I married the perfect woman. The downside is everything that goes wrong is my fault.
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It is really cool. In this demo they fabricated a polypropylene foam with the bubbles carrying a dipole charge on their surfaces. The foam is glued to two layers of silver conductor foil and behaves like a piezoelectric device in response to pressure it strains and produces an electric voltage and vice versa.
The foam expands with one voltage polarity and contracts with the other.
The downside is that it is likely compressive in output extremes as you reach maximum expansion or contraction. It is also not going to be of stable surface dimensions as it contracts or swells. So you need a soft suspension and control that resonance. The nice thing is that you don't need a real design for a driver as there are no relative motion parts like a motor and diaphragm.
So maybe the speakers could be window drapes or shades that just hang. The ultimate WAF.
I married the perfect woman. The downside is everything that goes wrong is my fault.
Still be a backwave to contend with.
My vote STILL goes to Graphene. Lighter and should be faster than the silvered EPP.
Too much is never enough
That is interesting, thanks.
I wonder how light and efficient a functional ferro-electret sheet can be made. Can it be made to compete with the new electrostatic micro devices, that have just recently been made into in ear speakers.
Dunno, seriously sketchy information!
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