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:6/25/2016)... Canada (PRWEB) , ... June 25, 2016 , ... Conventional ... pursuit of success. In terms of the latter, setting the bar too high can ... risk more than just slow progress toward their goal. , Research from ...
(Date:6/24/2016)... ... June 24, 2016 , ... June 19, 2016 is ... associated with chronic pain and the benefits of holistic treatments, Serenity Recovery Center ... suffering with Sickle Cell Disease. , Sickle Cell Disease (SCD) is a disorder of ...
(Date:6/24/2016)... MIAMI, Fla. (PRWEB) , ... June 24, 2016 , ... ... Florida Trend magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this ... of Florida. , Seven Greenberg Traurig Shareholders received special honors as members of this ...
(Date:6/24/2016)... ... ... makers of Topricin and MyPainAway Pain Relief Products, join The ‘Business for a Fair Minimum ... by 2020 and then adjusting it yearly to increase at the same rate as the ... wage floor does not erode again, and make future increases more predictable. , The company ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... proud to recognize Dr. Barry M. Weintraub as a prominent plastic surgeon and ... women in the world, and the most handsome men, look naturally attractive. Plastic ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 23, 2016 Research and Markets has ... Market Analysis 2016 - Forecast to 2022" report to ... report contains up to date financial data derived from varied ... major trends with potential impact on the market during the ... segmentation which comprises of sub markets, regional and country level ...
(Date:6/23/2016)... WAYNE, Pa. , June 23, 2016 ... provider, will launch its next generation clinical outcomes platform, Bracket ... DIA Meeting held on June 26 – 30, 2016 in ... 6.0, the first electronic Clinical Outcome Assessment product of its ... DIA Booth #715. Bracket eCOA 6.0 is a ...
(Date:6/23/2016)... June 23, 2016  Astellas today announced the establishment of Astellas Farma Colombia (AFC), a new affiliate with operations ... Latin America . ... ... ... ...
Breaking Medicine Technology: