NEW: A working tractor beam made of sound

Credit: Image courtesy of Asier Marzo, Bruce Drinkwater and Sriram Subramanian copyright 2015

A team of researchers from the Universities of Bristol and Sussex in 
collaboration with Ultrahaptics has built a novel sonic tractor beam
that can lift and move objects using sound waves.
You may not have considered using sound to create a tractor beam, but researchers did and have developed not one but three sonic technologies that hold and manipulate small objects.

 Amazing stuff, this, straight out of science fiction.

 Here's the report with a link to the longer article in the journal Nature Communications.
*  *  *  *  * 

Sonic tractor beam moves stuff with sound

The concept of tractor beams that can grab and lift objects has been used by science-fiction writers, and programs like Star Trek, but has since come to fascinate scientists and engineers. Researchers have now built a working tractor beam that uses high-amplitude sound waves to generate an acoustic hologram which can pick up and move small objects.

Scientists have built a novel sonic tractor beam that can lift and move objects using sound waves. High-amplitude sound waves are used to generate an acoustic hologram which can pick up and move small objects.  The research team has created three-dimensional acoustic fields with shapes such as fingers, twisters and cages. These acoustic fields are the first acoustic holograms that can exert forces on particles to levitate and manipulate them.

The technique, published in Nature Communications, could be developed for a wide range of applications -- for example, a sonic production line could transport delicate objects and assemble them, all without physical contact. On the other hand, a miniature version could grip and transport drug capsules or microsurgical instruments through living tissue.

Asier Marzo, PhD student and the lead author, said: "It was an incredible experience the first time we saw the object held in place by the tractor beam. All my hard work has paid off, it's brilliant."

Bruce Drinkwater, Professor of Ultrasonics in the University of Bristol's Department of Mechanical Engineering, added: "We all know that sound waves can have a physical effect. But here we have managed to control the sound to a degree never previously achieved."

Sriram Subramanian, Professor of Informatics at the University of Sussex and co-founder of Ultrahaptics, explained: "In our device we manipulate objects in mid-air and seemingly defy gravity. Here we individually control dozens of loudspeakers to tell us an optimal solution to generate an acoustic hologram that can manipulate multiple objects in real-time without contact."

The researchers used an array of 64 miniature loudspeakers to create high-pitch and high-intensity sound waves. The tractor beam works by surrounding the object with high-intensity sound and this creates a force field that keeps the objects in place. By carefully controlling the output of the loudspeakers the object can be either held in place, moved or rotated.

The team have shown that three different shapes of acoustic force fields work as tractor beams.

  1. The first is an acoustic force field that resembles a pair of fingers or tweezers. 
  2. The second is an acoustic vortex, the objects becoming stuck-in and then trapped at the core and 
  3. the third is best described as a high-intensity cage that surrounds the objects and holds them in place from all directions.

Previous work on acoustic studies had to surround the object with loudspeakers, which limits the extent of movement and restricts many applications. Last year, the University of Dundee presented the concept of a tractor beam but no objects were held in the ray.
Video: The sonic tractor beam

Related stories:

Basics of the Universe (General Relativity, Special Relativity & Quantum Mechanics):
Technology:
Story Source:  Materials provided by University of Sussex.  Asier Marzo, Sue Ann Seah, Bruce W. Drinkwater, Deepak Ranjan Sahoo, Benjamin Long, Sriram Subramanian. Holographic acoustic elements for manipulation of levitated objects. Nature Communications, 2015

Comments

Post a Comment

Popular posts from this blog

Workout supplements: An emerging eating disorder in men?

Image
therewontbeanydoves.wordpress.com When developing a fictional character, you may not think about the character using large amounts of over-the-counter dietary supplements.  Especially a man who uses large amounts of workout supplements. While there has been widespread publicity on the dangers of the non-prescribed use of anabolic steroids, not much is said about legal, over-the-counter supplements.  Are there risks?  And if so, what are they?  There are several things the writer should consider. Supplement use is becoming an eating disorder with many men who use them to prepare for and recover from a workout. There is growing evidence of a link between muscle-building supplements and testicular cancer. There is evidence that over-the counter medications and supplements are the most common causes of drug-induced liver failure (a rare event, but still a risk.)  There is even evidence that, “certain popular herbal and dietary supplements can also cause liver damage,"
Read more

Remember faces but not names? You got it wrong.

Image
Source:   Daily Excelsior So, you think you're good at remembering faces, but terrible with names? New research has revealed we are actually better at remembering names than faces The cringe-worthy experience of not being able to remember an acquaintance's name leads many of us to believe we are terrible with names. However, new research has revealed this intuition is misleading; we are actually better at remembering names than faces. With the Christmas party season fast approaching, there will be plenty of opportunity to re-live the familiar, and excruciatingly-awkward, social situation of not being able to remember an acquaintance's name. This cringe-worthy experience leads many of us to believe we are terrible at remembering names. However, new research has revealed this intuition is misleading; we are actually better at remembering names than faces. The authors of the study, from the University of York, suggest that when we castigate ourselves f
Read more

Using Artificial Intelligence to Predict Violence. . . or to Control It?

Image
Dell EMC InFocus A staple of science fiction is a future where artificial intelligence (AI) is used to control people's behavior, or, in which AI supplants the human element. I have mixed feelings about AI, its uses, and our future.  For one thing, it's questionable that the human brain can increase in size or complexity without causing the system to slow down.  The brain of a "genius" isn't larger than yours or mine, its simply organized differently.  The difference between early versions of humans and modern humans is in large part, size.  Yes, brain organization plays a role, but until the latest iteration of us, brain size was the critical factor. If we as a species have survived based on brain size, and brain size has maxed out, how do we continue to evolve intellectually?  Better organization?  Yes, but can we ever hope to create and control this type of evolutionary activity? One solution to maxed human brain size is creating an interface
Read more

M.I.T. Research Explains How Will Rogers Observation Works

Image
Finally it appears that MIT has gotten involved in proving Will's syllogism, "There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." Read his statement carefully.   ONE learns by reading.   A FEW who learn by observation. Then there's the rest of us. The reason for this, it turns out, is a special circuit in the brain that you or I need to have a functioning version of to actually learn by observing others.  Based on how we all behave, it is a circuit most of us must be missing.   Or perhaps it shorted out the first time we peed on an electric fence and it has yet to grow back.   *  *  *  *  * Brain circuit helps us learn by watching others Scientists pinpoint neural interactions that are necessary for observational learning Researchers have identified a brain circuit required to learn by watching others. This circuit,
Read more

War Leaves 17 Women for Every Man

Image
Source: Psychology Today This report of a "Y-chromosone Bottleneck" that occurred seven thousand years ago raises some interesting questions. In it, the author theorizes that war may have the effect of simplifying the male genome to the point that it's like having but one man for every 17 women.  Sounds like a male fantasy, but is it good for humanity and the potential for our survival on our planet? Research shows that healthy populations depend on genetic diversity such as in this report from 2015,  Genetic Diversity Linked to Today's Taller, Smarter People .  So if war has the effect of creating a male genome bottleneck, does the bottleneck limit the diversity needed to maintain a healthy population?  Could genetic bottlenecks be the reason that some militarily aggressive cultures such as the ancient Romans and Greeks are very peaceful today?  i.e., have they had the aggression breed out of them by years of wars in which the most warlike men died in bat
Read more