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Sound Cloaks enter the Third Dimension

Started by starwarp2000, April 02, 2013, 09:04:49 AM

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starwarp2000

QuoteA simple plastic shell has cloaked a three-dimensional object from sound waves for the first time. With some improvements, a similar cloak could eventually be used to reduce noise pollution and to allow ships and submarines to evade enemy detection.

QuoteJosé Sánchez-Dehesa, an electrical engineer at the Polytechnic Institute of Valencia in Spain, and his colleagues pursued a different method: Instead of preventing sound waves from hitting an object — in this case an 8-centimeter plastic sphere — they built a cloak to eliminate the scattered waves left in the sphere's wake.

Using computer algorithms, the researchers came up with a design made up of 60 rings of various sizes that form a cagelike structure around the sphere. Simulations indicated that sound waves scattering off the sphere and the ringed cloak would interfere with each other and cancel out. (Noise-cancelling headphones exploit this phenomenon by emitting sound waves that minimize ambient sounds in a room.)

www.sciencenews.org/view/generic/id/349255/description/Sound_cloaks_enter_the_third_dimension

Ingenious!
Instead of making the object invisible to sonar by modifying the geometry of the object, they constructed a series of structures around the object that mimicked the wave patterns that would cancel the sound.
Turn the problem 'inside-out'! Ingenious!
Sit down before fact like a small child, and be prepared to give up every preconceived notion, follow humbly wherever and to whatever abyss nature lead, or you will learn nothing. —T. H. Huxley

PLAYSWITHMACHINES

Fascinating stuff, as usual my freind :D

It makes one wonder if this could be applied to radio waves (radar) as well?

Why not?

Anyone sees a plane that is covered in fins? Looking maybe like a giant car stereo heatsink?
That would be a second generation stealth plane, methinks ;)

Pimander

Quote from: PLAYSWITHMACHINES on April 02, 2013, 12:36:14 PM
Anyone sees a plane that is covered in fins? Looking maybe like a giant car stereo heatsink?
That would be a second generation stealth plane, methinks ;)
It might struggle to fly.  I'd paint rings around the plane using a highly conductive paint perhaps.  8)

starwarp2000

Quote from: PLAYSWITHMACHINES on April 02, 2013, 12:36:14 PM
Fascinating stuff, as usual my freind :D

It makes one wonder if this could be applied to radio waves (radar) as well?

Why not?

Anyone sees a plane that is covered in fins? Looking maybe like a giant car stereo heatsink?
That would be a second generation stealth plane, methinks ;)

You are thinking way ahead of me PWM!  ;)

I was thinking more along the lines of 'Standing Waves' position around the fuselage to mimic the cancellation of all radar returns!
I was reading another article about how the human ear actually transmits sound 'outwards' and it is this sound that interacts with the environmental sound that we hear. Standing waves seem to be in everything!
Another interesting fact I picked up along the way (Can't remember the reference) was that Tesla coils are invisible to Radar! (A well-kept military secret). Might be because of those standing waves?
So turn your aircraft into the top capacitance of a giant Tesla coil, but watch out for the metallic parts......... zaaaaaapppppp!  ;D
Sit down before fact like a small child, and be prepared to give up every preconceived notion, follow humbly wherever and to whatever abyss nature lead, or you will learn nothing. —T. H. Huxley

PLAYSWITHMACHINES

I can maybe do a few tests in the 10cm band..... ::)

First, i have to rewire the 'sensor tree' LOL


starwarp2000

Longitudinal Sensor array?

Might try just a Bifilar Pancake Coil with a Spark Gap too  8)
Sit down before fact like a small child, and be prepared to give up every preconceived notion, follow humbly wherever and to whatever abyss nature lead, or you will learn nothing. —T. H. Huxley

PLAYSWITHMACHINES

#6
I did some experiments with flat coils, but the results were poor.
Mind you, i was trying to go above 6MHz...

What i would like to do, is test this theory with radar (10cm) the grey box at the bottom of the 'tree' is a Gunn diode type radar transciever.
It works by doppler shift, so it only tracks moving, not stationary objects.

So i would first set the object to move in front of the radar (maybe a simple pendulum) & then coat it with rings of (as you suggested) conducting paint, or strips of foil etc.
Certain metals actually absorb RF, and these are used in powder-coated form on the current stealth planes, i would think.

The cylinder with the blue ends is the same but using ultrasound ::)

The orange box next to it is an infra-red transciever.
Above that are 2 optical refraction sensors, & on top is a 680nM (red) laser.

It's a multi-function sensor array designed for checking movement in my Gravitor experiments ;) but can easily be used for testing 'cloaking' devices... 8)

1Worldwatcher

Quote from: PLAYSWITHMACHINES on April 04, 2013, 11:41:56 AM
I did some experiments with flat coils, but the results were poor.
Mind you, i was trying to go above 6MHz...

What i would like to do, is test this theory with radar (10cm) the grey box at the bottom of the 'tree' is a Gunn diode type radar transciever.
It works by doppler shift, so it only tracks moving, not stationary objects.

So i would first set the object to move in front of the radar (maybe a simple pendulum) & then coat it with rings of (as you suggested) conducting paint, or strips of foil etc.
Certain metals actually absorb RF, and these are used in powder-coated form on the current stealth planes, i would think.

The cylinder with the blue ends is the same but using ultrasound ::)

The orange box next to it is an infra-red transciever.
Above that are 2 optical refraction sensors, & on top is a 680nM (red) laser.

It's a multi-function sensor array designed for checking movement in my Gravitor experiments ;) but can easily be used for testing 'cloaking' devices... 8)

This would be a great post with in Deuems Research thread PWM!! It is what I am trying to convey too ArMap on Ambient Wave signatures, and that they don't occur without some kind of interaction to cause them.

When Stealth technology came about, the faceted ideology was stumbled upon, or so they say. I personally believe that if Doppler effects can be manipulated, whether they be signatures from Light/Sound or ambient caused, the sphere is the most dynamic for low profile and signature of it's presence.

MAN!! I wish I had all the equipment you have PWM and a few others here, I would be in the garage all day long every day!! LOL ;) Heck, might even give up fishing trips too get me a bit smarter with first hand experience's and hands on discussion's! :P

Well, at least I have all your toy's too look at here and learn about, beats being in the shadows saying "WTF is that?" LOL

Will be keeping my eye on this thread for sure, I am sure we are going to get some implacable nuances with in this technology, and as we know, regardless of out come, it must be done because we seek.. ;)

1WW
"To know men is too have knowledge, to know self is to have insight."

PLAYSWITHMACHINES

Thanks, mate :D

Wish i had more time, we still have all this to sort out;

http://www.thelivingmoon.com/forum/index.php?topic=4155.0
Just in case ya missed it ;)

Have to go..

1Worldwatcher

Quote from: PLAYSWITHMACHINES on April 04, 2013, 03:41:04 PM
Thanks, mate :D

Wish i had more time, we still have all this to sort out;

http://www.thelivingmoon.com/forum/index.php?topic=4155.0
Just in case ya missed it ;)

Have to go..

Oh Yes!! I read the Itinerary for IG , I have been doing a bit of everything, as limited as I am currently with sharing information, I can still read and research with in the topics we discuss.

As for the Itinerary and your expectations, was there something specific you had in mind for either projects for specific people, or, do you want us to be round robin contributors?

I was going to post with in the thread for Itinerary list, but wasn't sure who was suppose to be doing what?  ???

Back to the topic at hand: "I am interested in seeing if there is a shift with in residual effects with Doppler facilitated testing of there being a "Compaction" event happening with in applied force/Frequency. This is also a conceptual thought I am having that with in the fine construct of manipulated Fields, lays the parameters of 'Compaction Event' that would divisively produce answers with in Doppler effects and how too destabilize object signatures for sure. Though a theory I have been kicking around with in "Spherical Technologies" this would allow credence to the whole molecular interaction and frequency applied theories I have been assuming.

Either way, anxious to see your result PWM, as always. ;)

1WW
"To know men is too have knowledge, to know self is to have insight."

zorgon

Quote from: PLAYSWITHMACHINES on April 02, 2013, 12:36:14 PM
It makes one wonder if this could be applied to radio waves (radar) as well?
Why not?

The stealth coating that Dr Resnick invented and IgnoreTheFacts (from ATS) applies :P that works on light making it invisible also works on radar waves and even lasers... effectively all EM radiation

The angular shape of planes and ships is designed to deflect sound and EM waves in a different direction, not back at the receiver

Visby kass Corvette



QuoteAnyone sees a plane that is covered in fins? Looking maybe like a giant car stereo heatsink?
That would be a second generation stealth plane, methinks ;)

Applying a plasma field to the skin would do the same thing. JLN Labs dd the demo on how that works, including elimination of the sonic boom

zorgon

Hiding the plane or ship is easy enough but the ship still leaves a wake that can be spotted from satellite and jets still leave heat signatures 

::)


PLAYSWITHMACHINES

Yes, jetstream is a problem, unless you can do Mach 40 & don't really give a damn if they see you LOL
Ionisation will eliminate a lot of it, though...

QuoteI was going to post with in the thread for Itinerary list, but wasn't sure who was suppose to be doing what?

That's what we need to sort out. I'm hoping each of us will pick their 'favourite subject' & do some research (docs or wires/magnets) in that area.

Quote"I am interested in seeing if there is a shift with in residual effects with Doppler facilitated testing of there being a "Compaction" event happening with in applied force/Frequency.

This seems to be verified by the TTB / podkletnov experiments.
I posted Beau Kitselman's material analysis somewhere here....

Definitely easy to prove in a small lab setup ;)

QuoteThough a theory I have been kicking around with in "Spherical Technologies"

Me too! But i have yet soo much to read, i have to find the ORIGINAL Smith papers somewhere here, and find the missing calculus book.

Certainly exciting times to live in, freinds :D

starwarp2000

Lots of Invisibility Links:

http://scitechdaily.com/a-new-kind-of-invisibility-cloak-demonstrates-better-cloaking-efficiency/

http://scitechdaily.com/magnetic-cloak-hides-objects-from-static-magnetic-fields/

http://scitechdaily.com/time-cloak-creates-hole-in-time-makes-events-disappear/

On the subject of a Cloaked aircraft  leaving a wake or a sonic boom > If the fuselage is sufficiently electrified then the air is repelled around the front and attracted towards the back (Of course you have to know what types of field to apply  8) ), and thereby 'slipping' through the air without any disturbance! I haven't heard any UFOs making a sonic boom?
Sit down before fact like a small child, and be prepared to give up every preconceived notion, follow humbly wherever and to whatever abyss nature lead, or you will learn nothing. —T. H. Huxley

1Worldwatcher

There are quite a few things that point to these acclimated abilities are very real indeed. Good places too see  the tech of the understanding with in these types of researchers are found with in these sites I frequent often for updates and answers:

Dielectric Sphere in Homogeneous Fields
Keep in mind, Spherical implicated designs have proving too be the most viable for such things as "Cloaking/Invisibility" Technology with in the sciences.

http://www.problemsinelectrodynamics.com

Sympathetic Vibratory Physics
Oscillation with in Atomic structures are widely accepted as the conduit for such things as "Cloaking/Invisibility" furthering current research with in this field.

http://www.svpvril.com

American Antigarvity

http://www.americanantigravity.com

Some of the interactions they mention are strong resemblances to the Schumann resonance 'Z', so though I would post a few here that seem pertinent too this conversation.

1WW
"To know men is too have knowledge, to know self is to have insight."