Streams of sound are now all you need to make objects dance in the air and combine. A levitation device is the first to use high-frequency sound waves to bring together floating particles and liquid droplets. In principle, the technique could even levitate a person or animal – although it’s not strong enough yet.
For now, such hands-free control could be used to study chemical reactions in extreme environments, to move hazardous materials and to simulate the low-gravity environment of space. At 24 kilohertz, the waves are too high-pitched to be audible to humans – but can be heard by some animals, including cats, bats and mice.
Other levitation methods use magnets or electrical fields, making mag-lev trains – and even levitating frogs – possible. But in these cases, the levitated objects must have particular magnetic or electrical properties.
Acoustic levitation imposes no such constraints. It can, in principle, float anything, says Dimos Poulikakos of the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland.
A sound wave is a pressure wave that produces a force and so has the potential to counteract gravity. To float things using sound, you need to ensure the force remains constant in a particular point in space.
This has been done previously, by using speakers or other resonators to fire pressure waves upwards and bounce them off a reflector. The original waves and their reflections then combine to create a standing wave, with a series of stationary "nodes" that stay put even as the wave oscillates.
If the standing wave has the right frequency, the force at these nodes exactly cancels gravity – and anything trapped there hovers in place.
"Scientists at Argonne National Laboratory have discovered a way to use sound waves to levitate individual droplets of solutions containing different pharmaceuticals. While the connection between levitation and drug development may not be immediately apparent, a special relationship emerges at the molecular level."
Nigel Farage (UKIP) Speech on the EU, UK & Mass Immigration 2014 03 08
UKIP Nigel Farage Spring Conference speech - 2014
Red Ice Radio:
Nigel Farage MEP - The State of the EU & The Undemocratic Treaty of Lisbon
Labour wins UK by-election as Ukip trumps Tories
The ruling coalition in the UK was dealt a blow in the latest by-election test, as the UK Independence party pushed the Conservatives and Liberal Democrats into third and fourth ...
Pentagon studying Putin’s body language to predict his behavior 2014 03 07
The Pentagon has spent hundreds of thousands of dollars in recent years so that researchers can study the body movements of foreign leaders, including Russian President Vladimir Putin, in hopes of predicting future behavior.
An article published by USA Today reporter Ray Locker on Thursday and corroborated by documents discovered by RT provides rare insight into a scarcely-discussed military effort that ...
Pentagon Claims That Climate Change ‘Enables Terrorism’ 2014 03 07 In it’s latest Quadrennial Defense Review the Pentagon has said that climate change and ’erratic’ climate will cause increased terrorist activity.
The four yearly reports highlight threats that face civilization and this years homed in on climate change causing an increase in terrorism.
It also mentioned that rises in sea levels and other issues associated with a warming planet will lead ...
Scientists Control Tiny Mechanical Probes Inside Human Cells 2014 03 07 Nanotechnology doesn’t get as much attention these days as genetic and stem cell approaches to medicine, but all three aim to target the causes of illness with greater precision and less collateral damage in the rest of the body than conventional approaches.
Nanotech breakthroughs have come more slowly than many had hoped, but a recent success shows progress toward the goal ...
Fukushima: The Ticking Nuclear Bomb. Over 800 Tons of Radioactive Material Pouring into Pacific Ocean 2014 03 07
First published by GR in October 2013
In August this column ran a piece claiming that the Pacific Ocean was being poisoned by radioactive material escaping from Fukushima, two years after the devastating tsunami and meltdown at the Japanese nuclear facility. Three months later, shocking evidence points towards a calamity situation.
Silence from the corporate media.
There is growing evidence coming from ...