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c/technology · by artifex@piefed.zip · 13d

Researchers show off tiny, completely silent drones powered by sound

https://actu.epfl.ch/news/these-tiny-drones-are-powered-by-sound-2/

Researchers have figured out how make shaped drone rotors that convert audible and ultrasound frequencies into stable mechanical spinning motion, leading to tiny drones that can be completely silent. While scary-sounding (no pun intended) it's unclear how usable these would be in the real world, since a line-of-sight source of sound waves has to be provided.

101 points · 23 comments · view on lemmy.world

23 Comments

kibblebits@quokk.au · 56 pts · 13d (3 replies)

These nano-soldiers are attracted to and powered by the sound of your screams.

artifex@piefed.zip · 20 pts · 13d

This would be highly efficient.

DrakeAlbrecht@lemmy.world · 3 pts · 13d (1 reply)

https://lemmy.world/post/50827244

kibblebits@quokk.au · 2 pts · 13d

Yes just like this.

AbouBenAdhem@lemmy.world · 33 pts · 13d

several sound-responsive structures could be built into a single flexible device, with each one reacting to a different sound frequency. “This would allow specific parts of the device to move, bend or vibrate, potentially leading to aerodynamic robotic devices that can change shape in response to sound,” he says.

I’m picturing Yondu’s whistle-powered dart.

deadbeef79000@lemmy.nz · 21 pts · 13d (6 replies)

"silent"

"powered by sound waves"

Pick one.

UnderpantsWeevil@lemmy.world · 15 pts · 13d (1 reply)

You claim that your kite operates without making any noise, and yet it is powered by wind, which is quite noisy.

deadbeef79000@lemmy.nz · 6 pts · 13d

Kites are noisy.

flap flap flap...

Humming string etc.

HubertManne@piefed.social · 10 pts · 13d

there is sound we can't hear. there is also light we can't see.

Redfox8@mander.xyz · 8 pts · 13d

They're powered by sound from other sources but don't create sound themselves...no?

SkybreakerEngineer@lemmy.world · 5 pts · 13d (1 reply)

Of course it's silent. It's doubtful our sonar would pick it up, and if it did, it would sound like whales humping, or some kind of seismic anomaly

deadbeef79000@lemmy.nz · 2 pts · 13d

But does it always turn left in the bottom half of the hour?

Eryn6844@piefed.blahaj.zone · 11 pts · 13d (2 replies)

WTf is wrong with these people? why are you making shit they will useagainst us? enslave us with?

WhatAmLemmy@lemmy.world · 1 pts · 13d

https://youtube.com/watch?v=8HgejSCHRi8

spacegoat@lemmy.world · 1 pts · 13d

If you had a button that would end humanity would you press it? There are many who would

Syndication@lemmy.today · 9 pts · 13d

I feel bad for severe schizophrenics because now they'll have trouble telling what's actually real or what's just paranoia.

jobbies@lemmy.zip · 5 pts · 13d

Nanobots.

Entertainmeonly@lemmy.blahaj.zone · 4 pts · 13d

We are so cooked

sirico@feddit.uk · 2 pts · 13d (1 reply)

Yes the sweet release of grey goo

FauxLiving@lemmy.world · 3 pts · 13d

It looks like grey goo and skynet are competing to see who will be the next apocalypse.

Kolanaki@pawb.social · -5 pts · 13d (2 replies)

Silent

powered by sound

So not silent? 🤔

tyler@programming.dev · 3 pts · 13d

Huh? External sound does not mean the object produces sound.

arctanthrope@lemmy.world · 2 pts · 13d

> doesn't glow

> powered by light

🤔

> doesn't shock people

> powered by electricity

🤔