Sentences with phrase «by acoustic waves»

The observatory will also measure patterns in the distribution of galaxies left by acoustic waves in the early universe.

If the optical wave travelling along a fibre is disrupted — scattered — by the acoustic wave, it produces a backward traveling wave, called the Stokes wave.

Not exact matches

By contrast, the poor acoustics in offices, sports venues and bars usually results from sound waves reflecting off hard materials such as glass, concrete or metal.

Researchers have been pushing the capabilities of materials by carefully designing precise structures that exhibit abnormal properties that can control acoustic or optical waves.

Dr Usama Kadri, from Cardiff University's School of Mathematics, believes that lives could ultimately be saved by using acoustic - gravity waves (AGWs) against tsunamis that are triggered by earthquakes, landslides and other violent geological events.

However, this study has provided proof - of - concept that devastating tsunamis could be mitigated by using acoustic - gravity waves to redistribute the huge amounts of energy stored within the wave, potentially saving lives and billions of pounds worth of damage.»

Similar effects are used in acoustics: Different sounds are created by combining waves of different frequencies.

By experimenting with different forms of acoustic signals, he found that a large pulse followed by a small one could reflect sound waves in such a way as to allow fish and bubbles to be easily distinguisheBy experimenting with different forms of acoustic signals, he found that a large pulse followed by a small one could reflect sound waves in such a way as to allow fish and bubbles to be easily distinguisheby a small one could reflect sound waves in such a way as to allow fish and bubbles to be easily distinguished.

The new system, described in the March 5 edition of the journal Nature Communications, combines photons and phonons — electromagnetic energy and sound energy — to conduct sophisticated signal processing tasks by harnessing the properties of lower - velocity acoustic waves.

Acoustic tweezers is a microfluidic device that utilizes ultrasound waves produced by piezoelectric transducers to gently and precisely position biological samples without damage.

But the actual trick used by Daniele Foresti, former doctoral student now a postdoctoral researcher at the Laboratory of Thermodynamics in Emerging Technologies, is based on acoustic waves.

It overcomes a significant barrier in the field by enabling the manipulation and patterning of micro - or nanometer sized protein crystals using low power, biocompatible acoustic waves.»

In a pair of recently published papers, a team led by Berkeley Lab researcher Jonathan Ajo - Franklin announced they had successfully combined a technology called «distributed acoustic sensing,» which measures seismic waves using fiber - optic cables, with novel processing techniques to allow reliable seismic monitoring, achieving results comparable to what conventional seismometers can measure.

Perhaps most importantly, the approach used can be applied to other physical phenomena that are described by wave equations, such as acoustics.

Surface acoustic wave devices transmit a high - frequency signal by converting electric energy to acoustic energy.

Ground - coupled airwaves or GCAs occur when an acoustic wave in the atmosphere impacts Earth's surface, producing a ground wave that can be detected by seismometers.

«This study shows how we can expand the use of seismic data by looking at the acoustic waves from volcanic explosions that are recorded on seismometers,» explained Fee.

The sound, known as a surface acoustic wave (SAW) is picked up on the left by a «microphone» composed of interlaced metal fingers.

«Smartphone hacks 3 - D printer by measuring «leaked» energy and acoustic waves: Intellectual property may be ripe for theft, study shows.»

The ARM method, on the other hand, uses a gentle acoustic wave generated by a similar power as ultrasound imaging and at a lower frequency.

That is why Chiang Mei at the Massachusetts Institute of Technology and Usama Kadri at Cardiff University, UK, hope to give people more notice by detecting the acoustic waves that precede earthquake - triggered tsunamis.

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.

Previous work by Huang showed that acoustic tweezers work by setting up a standing surface acoustic wave.

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.

By carefully measuring the acoustic waves, the researchers precisely determined the time it takes an acoustic wave to travel from the surface to the center of the sun and back again.

Acoustics of Fish Schools and Bubble Clouds: Experimental evidence and theoretical descriptions of low frequency resonances associated with fish schools and other wave induced bubble clouds, organized by Orest Diachok

The study used data from the Baryon Oscillation Spectroscopic Survey, or BOSS, an Earth - based sky survey that captured light from about 1.5 million galaxies to study the universe's expansion and the patterned distribution of matter in the universe set in motion by the propagation of sound waves, or «baryonic acoustic oscillations,» rippling in the early universe.

Hydrogen - bond acidic polymers are most widely used on acoustic wave sensors, which use sound waves in quartz chips to detect the vapors that are absorbed by the polymer.

Publication M. Foerster et al., Direct imaging of delayed magneto dynamic modes induced by surface acoustic waves, Nature Communications 8, 1 September 2017, DOI: 10.1038 / s41467 -017-00456-0

One way to produce rapid changes of strain on the subnanosecond scale and, thus, induce magnetization changes is by using surface acoustic waves (SAWs), which are deformation (strain) waves.

For the Baltimore meeting there were two special sessions, «Acoustics in Polar Environments», which was organized and chaired by Jennifer Miksis - Olds and Ann Bowles and «Impact of Shallow Water Acoustic Propagation by Linear Internal Waves and Neutrally Buoyant Intrusions», organized and chaired by DJ Tang and David Bradley.

Rozynova has been awarded a 2017 Newman Student Award Medal, for her work on «Improved Theory of Acoustic Elementary Edge Waves of Finite, Rectangular Plates for Room - Acoustic Simulations», as nominated by Prof. Ning Xiang.

In the GT R, full throttle acceleration maneuvers are accompanied by rolling acoustic earthquakes that come and go in waves — accentuated by fake heeling and toeing throttle blips and chip - generated lift - off backfires.

In addition to the Bose audio noise cancellation system, acoustic glass, triple door seals and plenty of foam insulation applied consistently by industrial robots, there's a new proprietary sound displacement material under the floor whose varying thickness works to dissipate sound waves.

Within earshot of lapping waves, diners sit under a tropical canopy of twinkling lights while being entertained by live acoustic music.

This hotspot, by process of elimination, must be heated from below, and this detection is therefore strong evidence for coupling between Jupiter's lower and upper atmospheres, probably the result of upwardly propagating acoustic or gravity waves.