Imagine being able to hear people whispering in the next room, while the raucous party in your own room is inaudible to the whisperers. Yale researchers have found a way to do just that — make sound flow in one direction — within a fundamental technology found in everything from cell phones to gravitational wave detectors.
What’s more, the researchers have used the same idea to control the flow of heat in one direction. The discovery offers new possibilities for enhancing electronic devices that use acoustic resonators.
The findings, from the lab of Yale’s Jack Harris, are published in the April 4 online edition of the journal Nature.
“This is an experiment in which we make a one-way route for sound waves,” said Harris, a Yale physics professor and the study’s principal investigator. “Specifically, we have two acoustic resonators. Sound stored in the first resonator can leak into the second, but not vice versa.”
Harris said his team was able to achieve the result with a “tuning knob” — a laser setting, actually — that can weaken or strengthen a sound wave, depending on the sound wave’s direction.
Then the researchers took their experiment to a different level. Because heat consists mostly of vibrations, they applied the same ideas to the flow of heat from one object to another.
“By using our one-way sound trick, we can make heat flow from point A to point B, or from B to A, regardless of which one is colder or hotter,” Harris said. “This would be like dropping an ice cube into a glass of hot water and having the ice cubes get colder and colder while the water around them gets warmer and warmer. Then, by changing a single setting on our laser, heat is made to flow the usual way, and the ice cubes gradually warm and melt while the liquid water cools a bit. Though in our experiments it’s not ice cubes and water that are exchanging heat, but rather two acoustic resonators.”
Although some of the most basic examples of acoustic resonators are found in musical instruments or even automobile exhaust pipes, they’re also found in a variety of electronics. They are used as sensors, filters, and transducers because of their compatibility with a wide range of materials, frequencies, and fabrication processes.
The Latest on: One-way sound
via Google News
The Latest on: One-way sound
- Private Flying on Aero: This Is What It's Like to Have Access to Your Own Jeton April 10, 2021 at 3:00 pm
Is Aero's semiprivate jet service as easy and glamorous as it looks? We test the flight from Los Angeles to Aspen to find out.
- Dave Roberts explains why he didn't use Kenley Jansen in win over Nationalson April 9, 2021 at 5:18 pm
Dodgers manager Dave Roberts opted to go with Corey Knebel instead of Kenley Jansen to help secure a 1-0 victory over the Washington Nationals.
- Taming the crowds: rethinking the tourism future of Milford Sound/Piopiotahion April 9, 2021 at 10:00 am
The Milford Sound tourists have gone, and with them their food and fun ... Bradley figures there’s only one way in and out – the Homer Tunnel – so controlling car access would be easy. You could have ...
- David Briggs: How sweet the sound as baseball fans return to Fifth Third Fieldon April 9, 2021 at 4:03 am
Call it a very wet dry run. The skies opened over Toledo mid-Thursday afternoon, but not before the gates opened at Fifth Third Field, our baseball Eden at last welcoming us back. For the first time ...
- A love letter to a city: How Alice Cooper and Bob Ezrin made Detroit Storieson April 8, 2021 at 11:24 pm
With some of Motor City’s iconic musicians on board for the thrill ride, Alice Cooper’s new album Detroit Stories is "an homage to the place to which we owe our careers" ...
- Heupel Discusses Tennessee's First Spring Scrimmageon April 8, 2021 at 6:03 pm
Tennessee returned to the practice field for its first scrimmage setting on Thursday evening. The Vols played at full-speed, full-contact for roughly 85% of the ...
- Sound of Metal, review: as a drummer going deaf, Riz Ahmed makes a noiseon April 8, 2021 at 4:41 am
The Oscar-nominated actor gives a powerhouse performance in Darius Marder’s tale of addiction, loss, and redemption ...
- Lane Kiffin reveals one way Bill Belichick is more thorough than most GMson April 7, 2021 at 11:06 am
A few college coaches can probably expect calls from New England Patriots coach Bill Belichick ahead of the 2021 NFL draft. It’s customary for Belichick to inquire about the prospects he might draft.
- SOUND OFF: Taking a stand against racismon April 7, 2021 at 10:49 am
RACISM HAS A LONG HISTORY in British Columbia and still exists today. From the Japanese internment camps to recent hate crimes against the Asian community, racism in B.C. is pervasive, systemic and ...
- Going bush with the girls: Re-connecting while tramping through Pelorus Soundon April 3, 2021 at 10:00 am
I’ve been to the Queen Charlotte Sound several times and walked that track twice ... and eventually hit a gravel road and a number of one-way bridges. Kaiuma Bay is a small settlement on the edge of ...
via Bing News