Latest topics
» POOFness for JULY 20: PAPERWORK AND MORE LIES FROM GHOULKOWSKI
Today at 9:55 pm by 4-truth

» Regarding Anna Von Reitz — Manna World Trust, AI, Quantum, and More
Today at 9:51 pm by RamblerNash

» DARK JOURNALIST X SERIES PART XIX: SECRET SPACE FORCE & THE VALKYRIES RIDE
Today at 8:46 pm by PurpleSkyz

» The GoldFish Report No. 251- Country Roads w/ Winston Shrout: SS5 is Contract Under Fraud = Slavery
Today at 5:08 pm by PurpleSkyz

» Shuttle Tapes They DON'T Want You To See
Today at 3:06 pm by PurpleSkyz

» Hundreds of children abused by more than 30 clerics: new scandal in Hawaii
Today at 2:42 pm by PurpleSkyz

» Previously Unidentified "Structures" Photographed on the Outside of our Sun
Today at 2:31 pm by PurpleSkyz

» Prominent holistic doctor’s body found floating in Bay Area
Today at 2:25 pm by PurpleSkyz

» The Basque-Sumerian-Rh Negative Connection
Today at 2:22 pm by PurpleSkyz

» 3 Companies Recall Blood Pressure Medications Over Cancer Fears
Today at 2:18 pm by PurpleSkyz

» Just Breathe
Today at 12:10 pm by PurpleSkyz

» POOFness for JULY 18: SYSTEM IS WORKING WELL SO KEEP SENDING ME MONEY!
Today at 11:39 am by 4-truth

» WHAT IS THE GOVERNMENT REALLY HIDING UNDER THE ANTARCTIC ICE? (MUST SEE!)
Today at 10:43 am by PurpleSkyz

»  Answers to Questions By Anna Von Reitz plus more
Today at 9:56 am by PurpleSkyz

» CrAzY TrAiN FrIdAy: FAKE "Judge"Anna Edition!
Today at 9:12 am by PurpleSkyz

» UFO News ~ Blazing UFO reported flying over Suffolk, England plus MORE
Today at 8:40 am by PurpleSkyz

» NIBIRU News ~ Planet X Nibiru in CHICAGO plus MORE
Today at 8:30 am by PurpleSkyz

» The Pentagon Discovered Anunnaki Underground Bases in Romania
Today at 8:24 am by PurpleSkyz

» Welcome to “Full 180” | ALL planets now on same side of Sun
Today at 8:22 am by PurpleSkyz

» Putin's America
Today at 8:19 am by PurpleSkyz

» Scarlett Johansson & Rule By The Mob - David Icke
Today at 7:53 am by PurpleSkyz

» Rothschild’s Ex-Wife Found Dead
Today at 7:51 am by PurpleSkyz

» hawaii eruption largest in 200 years
Today at 7:46 am by PurpleSkyz

» Jerzy Babkowski (AKA ZAP) Canadian Scammer! Fraud! Report! Investigate!
Today at 12:45 am by robert18

» Jerzy Babkowski (AKA ZAP) "The Hutchison Effect Fraud" - Meet Team Member Karla!
Yesterday at 9:44 pm by RamblerNash


CLICK THE SUBSCRIBE BUTTON BELOW TO RECEIVE OUR DAILY NEWSLETTER

A 2ND EMAIL COMPLETES THE ACTIVATION PROCESS




CLICK THE PURPLE BUTTON TO VIEW OUR LATEST POSTS



You are not connected. Please login or register

Out Of Mind » THE INSANITY OF REALITY » SCIENCE » Metamaterial that bends, shapes and focuses sound waves

Metamaterial that bends, shapes and focuses sound waves

Go down  Message [Page 1 of 1]

PurpleSkyz

avatar
Admin
Metamaterial that bends, shapes and focuses sound waves








   
A super-material that bends, shapes and focuses sound waves that pass through it has been invented by scientists.
The creation pushes the boundaries of metamaterials – a new class of finely-engineered surfaces that perform nature-defying tasks.
These materials have already shown remarkable results with light manipulation, allowing scientists to create a real-life version of Harry Potter’s invisibility cloak, for example.
But a research team from the Universities of Sussex and Bristol have now shown that they also work with sound waves, which could transform medical imaging and personal audio.
Finely shaped sound fields are used in medical imaging and therapy as well as in a wide range of consumer products such as audio spotlights and ultrasonic haptics. The research published today (Monday 27 February 2017) in Nature Communications shows a simple and cheap way of creating these shaped sound waves using acoustic metamaterials.
Metamaterial bricks are assembled into a layer to produce a meta-surface, which could have applications across healthcare and entertainment
These space coiling bricks act to slow down sound waves, meaning that they can be transformed into any required sound field
Nature Communications – Metamaterial bricks and quantization of meta-surfaces

The collaborative research team assembled a metamaterial layer out of lots of small bricks that each coil up space. The space coiling bricks act to slow down the sound meaning that incoming sound waves can be transformed into any required sound field.
The new metamaterial layers could be used in many applications. Large versions could be used to direct or focus sound to a particular location and form an audio hotspot. Much smaller versions could be used to focus high intensity ultrasound to destroy tumours deep within the body. Here, a metamaterial layer could be tailor-made to fit the body of a patient and tuned to focus the ultrasound waves where they are needed most. In both cases the layer could be fitted to existing loudspeaker technology and be made rapidly and cheaply.
Dr Gianluca Memoli, from the Interact Lab at the University of Sussex who led the study, said: “Our metamaterial bricks can be 3D printed and then assembled together to form any sound field you can imagine. We also showed how this can be achieved with only a small number of different bricks. You can think of a box of our metamaterial bricks as a do-it-yourself acoustics kit.
Professor Sriram Subramanian, Head of the Interact Lab at the University of Sussex, added: “We want to create acoustic devices that manipulate sound with the same ease and flexibility with which LCDs and projectors do to light. Our research opens the door to new acoustic devices combining diffraction, scattering and refraction, and enables the future development of fully digital spatial sound modulators, which can be controlled in real time with minimal resources.”
Bruce Drinkwater, Professor of Ultrasonics at the University of Bristol, explained: “In the future I think there will be many exciting applications of this technology. We are now working on making the metamaterial layers dynamically reconfigurable. This will mean we can make cheap imaging systems which could be used either for medical diagnostics or crack detection.”



https://youtu.be/BcVxRyvipcU

Abstract
Controlling acoustic fields is crucial in diverse applications such as loudspeaker design, ultrasound imaging and therapy or acoustic particle manipulation. The current approaches use fixed lenses or expensive phased arrays. Here, using a process of analogue-to-digital conversion and wavelet decomposition, we develop the notion of quantal meta-surfaces. The quanta here are small, pre-manufactured three-dimensional units—which we call metamaterial bricks—each encoding a specific phase delay. These bricks can be assembled into meta-surfaces to generate any diffraction-limited acoustic field. We apply this methodology to show experimental examples of acoustic focusing, steering and, after stacking single meta-surfaces into layers, the more complex field of an acoustic tractor beam. We demonstrate experimentally single-sided air-borne acoustic levitation using meta-layers at various bit-rates: from a 4-bit uniform to 3-bit non-uniform quantization in phase. This powerful methodology dramatically simplifies the design of acoustic devices and provides a key-step towards realizing spatial sound modulators.
SOURCES – University of Sussex, Nature Communications, Youtube


Thanks to: http://www.nextbigfuture.com
and: http://theearthplan.blogspot.com



  

Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum