Acoustic Bottle Beams from Berkeley Lab Hold Promise for Imaging, Cloaking, Levitation and Other Apps
There’s a new wave of sound on the horizon carrying with it a broad scope of tantalizing potential applications, including advanced ultrasonic imaging and therapy, and acoustic cloaking, levitation and particle manipulation. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a technique for generating acoustic bottles in open air that can bend the paths of sound waves along prescribed convex trajectories.
Sound waves move much like light waves. They travel on a straight path but this path – through reflection, diffraction or refraction – can be bent. This is the basis for ultrasound medical imaging and non-destructive testing of materials. An intense search has been underway in recent years to develop techniques that can bend the paths of sound waves along a curved trajectory so as to meet the more stringent demands of super high-resolution imaging, acoustic cloaking and other exotic applications. Artificial nanoconstructs known as “metamaterials” have been engineered that can bend sound waves sufficiently but the nature of these materials places limits on their applications, especially for biological purposes.
“We need to find ways to bend acoustic wave fields without depending on the use of a highly engineered medium,” says Xiang Zhang, director of Berkeley Lab’s Materials Sciences Division. “With our bottle beam technique, we can design and synthesize acoustic bottles that are capable of directing sound waves along paths of desired curvature through homogeneous space without the need of metamaterials or any other highly engineered medium.”
Zhang, who also holds the Ernest S. Kuh Endowed Chair Professor at the University of California (UC) Berkeley, directs the National Science Foundation’s Nano-scale Science and Engineering Center, and is a member of the Kavli Energy NanoSciences Institute (ENSI) at Berkeley. He and his group have gained international acclaim for research involving the manipulation of light and sound that has yielded some extraordinary results – an invisibility cloaking device, a plasmonic Airy beam that curves light, the world’s first acoustic hyperlens, a four-dimensional crystal that will keep perfect time forever, and much more.
The Latest on: Acoustic Bottle Beams
via Google News
The Latest on: Acoustic Bottle Beams
- Amazon saved the best Sonos speaker deals for Cyber Monday 2020on November 30, 2020 at 8:22 am
Sonos Beam - Smart TV Sound Bar with Amazon Alexa ... and more Deep bass – Five’s unrivalled acoustic design features three high-excursion woofers within a sealed architecture that eliminates ...
- The best soundbars to upgrade your TV's terrible sound systemon November 21, 2020 at 4:00 pm
All those glossy, lustrous, lavishly detailed images are undermined no end by that ‘wasps trapped in a glass bottle’ noise ... The Sonos Beam (£399) is the best soundbar you can buy.
- Robotic vacuum cleaners can be hacked to eavesdrop on conversationson November 18, 2020 at 7:51 am
Lidar is a method for measuring distances by illuminating the target with laser beams and measuring their ... a vacuum's Lidar sensor to sense acoustic signals in the environment, remotely harvest ...
- Even If I Could Take Off, I Could Never Get Past The Tractor Beam!on November 14, 2020 at 4:00 pm
Finally our childhood dreams of a working tractor beam are coming to fruition! It’s called acoustic levitation ... and now a bottle shaped trap — however only the tweezers and twister have ...
- Futuristic audio device 'puts music in your head' by beaming sound directly to the listener without the need for headphoneson November 12, 2020 at 11:27 pm
An Israeli technology firm has debuted a new desktop device that beams sound directly to a listener ... Here, the sound can be heard again as normal acoustic waves without disturbing others ...
- 'Cyber War' by Richard Clarkeon November 10, 2020 at 4:00 pm
If we could put this genie back in the bottle, we should ... those on the ground nearby would then have heard a longer acoustic wash of military jet engines blanketing the area.
- Sam Smith’s Voice Deserves To Be Turned Loose On A Much Rawer Breakup Album Than Love Goeson November 2, 2020 at 11:03 am
That particular electricity may have been lightning in a bottle. Smith’s plea for unchained ... snaps by longtime collaborator Jimmy Napes, beams with residual warmth despite the prevailing ...
- ClearOne Announces New BMA 360 Beamforming Microphone Array Ceiling Tile – Setting Unrivaled Audio Performance Standard in the Industryon October 19, 2020 at 6:15 am
In addition to the advancements in beamforming technology, the 6G Acoustic Echo Cancellation (AEC) delivers unmatched per-beam full-duplex audio performance. On-board audio algorithms, like noise ...
- Uncle Sam’s Dolphinson August 15, 2020 at 8:36 am
Beside him on a rubber mat lies one of the Iraq war’s most unusual veterans, a 33-year-old male Atlantic bottle-nose dolphin ... and focuses the sound like a beam. "In the water it’s like ...
- Diagnostic Imaging of Foreign Bodieson August 14, 2020 at 6:24 pm
Common opaque gastrointestinal foreign bodies include stones, certain toys and bottle tops ... with the sound beam. Most will show hyperechoic linear or curvilinear surface echoes, have sharply ...
via Bing News