Are there any electric speakers that produce enough force to

why on /sci/? this isn't even remotely scientific.

>>9152902
Your mom as I perform hedonistic, unethical sexual acts on her big fat booty.

>>9152906
how is this not scientific

>>9152921
care to elaborate?

>>9152928
flexing a cone hard enough to generate enough pressure to lift it off the ground would break it.

>>9152947
for any cone, regardless of its material?

File: Untethered-One-Legged-Hopping-in-3D-Using-Linear-Elastic-Actuator-in-Parallel-LEAP-Image-1024x599.png (1005KB, 1024x599px) Image search: [Google]

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>>9152902
Yes:
https://www.disneyresearch.com/publication/hoppingbot/

It can hop for 7 seconds before the coils get too hot

>>9152902
Opie, if you want someone to prove this can't be done, post it here (/sci/).
If ypu really want to ask people who _want_ to believe it can be done, go ask /diy/.
I'm not saying they can do it, but at least they'll try.

>>9152973
that's a glorified pogo stick, not a speaker

>>9152994
I'll do that thanks

>>9152994
> if you want someone to prove this can't be done, post it here (/sci/).
This is why I stopped posting my design ideas here, everyone is so negative.

>>9153030
>>The thrust-producing mechanism of the robot’s leg is an actuated prismatic joint, called a linear elastic actuator in parallel (LEAP). The LEAP mechanism comprises a voice coil actuator in parallel with two compression springs, which gives our robot passive compliance.

A voice coil with a return mechanism is for all intents and purposes a speaker.

>>glorified pogo stick
you have no idea how big a deal this was. Previously achieving this sort of hopping performance required hydraulics/pneumatics with a tether

>>9152902
A piezoelectric speaker can do this, it's just that the displacement will be very small.

>>9153412
>A voice coil with a return mechanism is for all intents and purposes a speaker.

OP here, I meant a speaker using air pressure for levitation.

>A piezoelectric speaker can do this, it's just that the displacement will be very small.

Can you link a couple of working examples?

File: levitation3.jpg (149KB, 960x640px) Image search: [Google]

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>>9153416
if you take pretty much any piezoelectric speaker, put something with the same weight of the speaker on top and apply voltage, you can move the weight up micrometers.

Here's an example:
https://www.comsol.com/offers/conference2012papers/papers/file/id/13148/file/13943_garcia_paper.pdf

>> levitation
has been done for h = tiny, pic and link related
http://www.mae.cuhk.edu.hk/~pguo/pmwiki.php/Main/Research

https://www.youtube.com/watch?v=4L_mA40kThc

I guess if you could do something like this:
http://www.aldebaran.cz/bulletin/2014_07/AAM_CD_final.pdf

perhaps instead of a speaker levitating a CD, you could make a thin piezoelectric speaker that you blast with power. Analysis of the system is likely to be very challenging though. You'd have to learn all kinds of crazy acoustics shit.

>>9153469
So, hypothetically, if you had enough powerful piezoelectric speakers, one could lift even a person?

>>9153498
I'll bet for levitation height = tiny, and a mirror smooth surface, that it could be done.

If you want to make a goddamn hoverboard go figure out how to calculate radiation pressure for objects larger than the wavelength of radiation used.

If an electromagnetic rail produces any sound whatsoever can it be considered an electric speaker?