h a l f b a k e r yViva los semi-panaderos!
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Seem that the cabbage tree emperor moth has little
scales
on them which absorb up to 50 percent of the
energy
(into
movement) from sound waves - so bats can't find
the
little
buggers.
Und zo, living near a rock concert, airport,
motorway,
rocking chair factory/cattery etc will
become very
popular
with thrifty people.
* Oddly enough the moths don't have ears, so the
moth
must be thinking "Could have sworn I saw
something" and
the bat thinks "Could have sworn I heard
something",
truly
Dame Nature has strange ways. Link.
Sound-absorbent wings and fur help some moths evade bats
https://www.science...s-evade-bats?tgt=nr
[not_morrison_rm, Nov 19 2018]
piezoelectric protein
https://aip.scitati...i/10.1063/1.4997446
[beanangel, Nov 20 2018]
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This movement you speak of - presumably it's a vibration, not a
displacement. And sound is already a vibration. So how is the
modified vibration easier to turn into electricity than the original
sound wave? |
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Dunno, it's too early in the morning, try me after the
3rd cup of coffee. |
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I would say that could accomplished with the use
of magnets and mirrors. The technicians sort the
details with this type of development. |
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You could engineer moths with piezoelectric proteins [link]
to produce electricity when they pick up vibrations. |
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// living near a rock concert, airport, motorway, rocking chair factory/cattery etc // |
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The moth's systems will have evolved to deal with the specific ultrasonic frequencies used by their primary predators. They will need to be resonant at those frequencies, and no other. |
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Anechoic coatings on submarines have similar design constraints. |
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The sound from general environmental sources tends to be broadband and is therefore very challenging to attenuate satisfactorily, apart from catteries, where the main source of disturbance can be mitigated by purchasing a suppresor for your .22 rifle. |
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No other information is available, for fear of reprisals. |
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Do those moth scales convert sound into actual, usable
"movement", or into "movement" of some parts of the scale
relative to other parts, which is then converted by the
intervening structures (seen in the image in the article) into
heat? Though I suppose that latter "movement" could still be
usable if you could hook up some of those piezoelectric
proteins (!!) to the different parts of the scale. |
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