Navigation Links
Designing an acoustic diode
Date:11/1/2013

WASHINGTON, D.C. Nov. 1, 2013 -- Most people know about ultrasound through its role in prenatal imaging: those grainy, grey outlines of junior constructed from reflected sound waves. A new technology called an "acoustic diode," envisioned by researchers in China's Nanjing University, may dramatically improve future ultrasound images by changing the way sound waves are transmitted.

In the journal Applied Physics Letters, which is produced by AIP Publishing, the scientists describe the theoretical framework for an acoustic diode -- a device that achieves a one-way transmission of sound waves much the same as an electrical diode controls the one-way transmission of electrical impulses.

The one-way flow of sound would provide brighter and clearer ultrasound images by eliminating acoustic disturbances caused by sound waves going in two directions at the same time and interfering with each other, explained researcher Jian-chun Cheng.

"The propagation direction of the output wave would be controlled freely and precisely," Cheng said. "These features are crucial for the medical ultrasound applications of the resulting devices."

How the Acoustic Diode Would Work

Sound waves easily flow in two directions. Yet in nature, total reflection of sound in one direction is known to occur at the air-water interface. This gave investigators the idea that an acoustical diode could be constructed by transmitting acoustic waves using an asymmetric prism to create total unidirectional reflection.

The team developed its theoretical model based on a material not found in nature called a near-Zero Index Metamaterial (ZIM) and a prism to create high transmission efficacy acoustic waves that strike a reflective boundary from two opposite sides.

In theory, explained Dr. Cheng, "This would produce a unique tunneling effect and an unprecedented property that the output waveform is kept consistent with those of the waves traveling toward a boundary. "


'/>"/>

Contact: Jason Socrates Bardi
jbardi@aip.org
240-535-4954
American Institute of Physics
Source:Eurekalert  

Related medicine news :

1. WalkersClub Canada Branches Into Sound Abatement, Offering Acoustic Insulation Panels for Commercial Needs Such as Sound Studios, Movie Theatres, and More
2. Acoustical Solutions, Inc. Opens New Operations Center in Dallas-Fort Worth Metroplex
3. Devotional Singer-Songwriter Brenda McMorrow Raps the Hanuman Chalisa, Acoustic-Style
4. Acoustical Treatment Brings Tidings of Comfort and Joy on ASI Blogs
5. Vibroacoustic Massage Table Designed by Somatron Now Offered by Rehabmart.com
6. Researchers study cry acoustics to determine risk for autism
7. Direct Diode Expert Silke Pflueger Addresses Their Expansive Impact and Applications at LME 2013
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Designing an acoustic diode
(Date:10/12/2017)... LA (PRWEB) , ... October 12, 2017 , ... Planet ... in the U.S., announced today its plans to open a flagship location in Covington, ... occupy the former Rooms To Go store next to Office Depot in the Holiday ...
(Date:10/12/2017)... ... October 12, 2017 , ... The American College of Medical ... Friedman, PhD, FACMI, during the Opening Session of AMIA’s Annual Symposium in Washington, D.C. ... honor of Morris F. Collen, a pioneer in the field of medical informatics, this ...
(Date:10/12/2017)... ... October 12, 2017 , ... Dr. Parsa Mohebi, the Los ... article to the newly revamped Cosmetic Town journal section, featuring articles ... procedure known as Follicular Unit Extraction (FUE). , Dr. Mohebi says ...
(Date:10/12/2017)... ... October 12, 2017 , ... On Saturday, October 21, ... relay – Miles by Moonlight to raise money for the American Heart Association Heart ... , Teams will work together to keep their treadmills moving for 5 hours. ...
(Date:10/12/2017)... ... October 12, 2017 , ... In the ... a year. In some states—like New York, New Jersey, Massachusetts, Texas, Virginia, Connecticut, ... retirement havens have extremely low property-tax rates, which contributes to the relatively lower ...
Breaking Medicine News(10 mins):
(Date:10/2/2017)... , Oct. 2, 2017 Halo Labs announces the European ... system called the HORIZON at MIBio 2017 in Cambridge, ... and visible particulate matter in biopharmaceutical samples with unprecedented speed and ... the novel technique Backgrounded Membrane Imaging. ... The HORIZON subvisible particle analysis system ...
(Date:9/28/2017)... -- Cohen Veterans Bioscience and Early Signal Foundation announce ... home sensors for real-time monitoring of patients with trauma-related ... organization focused on disruptive health solutions for rare disorders ... to record and integrate behavioral, cognitive, physiological and contextual ... ...
(Date:9/25/2017)... 2017   Montrium , an industry leader ... the IQPC Trial Master Files & Inspection Readiness ... EastHORN Clinical Services has selected eTMF Connect ... management. EastHORN, a leading European contract research organization ... transparency to enable greater collaboration with sponsors, improve ...
Breaking Medicine Technology: