Current Acoustic Waves News and Events

Current Acoustic Waves News and Events, Acoustic Waves News Articles.
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Spintronics: New production method makes crystalline microstructures universally usable
New storage and information technology requires new higher performance materials. One of these materials is yttrium iron garnet, which has special magnetic properties. Thanks to a new process, it can now be transferred to any material. Developed by physicists at Martin Luther University Halle-Wittenberg (MLU), the method could advance the production of smaller, faster and more energy-efficient components for data storage and information processing. The physicists have published their results in the journal ''Applied Physics Letters''. (2021-02-23)

Swimming upstream on sound waves
ETH researchers are among the first scientists to have succeeded in propelling microvehicles against a fluid flow using ultrasound. In future, these tiny vehicles are set to be introduced into the human bloodstream, thereby revolutionising the field of medicine. (2021-02-19)

Exaggerated radar data above the freezing level induced by terrain
Scientists find exaggerated radar data above the freezing level are induced by terrain. (2021-02-17)

RUDN University physicists analyzed the role of gravity in elementary particles formation
Gravity might play a bigger role in the formation of elementary particles than scientists used to believe. A team of physicists from RUDN University obtained some solutions of semi-classical models that describe particle-like waves. They also calculated the ratio between the gravitational interaction of particles and the interaction of their charges. (2021-02-17)

Changing the connection between the hemispheres affects speech perception
When we listen to speech sounds, our brain needs to combine information from both hemispheres. How does the brain integrate acoustic information from remote areas? In a neuroimaging study, a team of researchers led by the Max Planck Institute of Psycholinguistics, the Donders Institute and the University of Zurich applied electrical stimulation to participants' brains during a listening task. The stimulation affected the connection between the two hemispheres, which in turn changed participants' listening behaviour. (2021-02-12)

Study contradicts belief that whales learn songs from one another
A new study by a University at Buffalo researcher is directly contradicting the widely accepted cultural transmission hypothesis suggesting that whales learn their songs from other whales. 'Our findings indicate that neither cultural transmission nor social learning contributes significantly to how humpback whales change their songs over time.', says Eduardo Mercado, a professor of psychology in UB's College of Arts and Sciences. (2021-02-12)

Scientists manipulate magnets at the atomic scale
Fast and energy-efficient future data processing technologies are on the horizon after an international team of scientists successfully manipulated magnets at the atomic level. Physicist Dr Rostislav Mikhaylovskiy from Lancaster University said: ''With stalling efficiency trends of current technology, new scientific approaches are especially valuable. Our discovery of the atomically-driven ultrafast control of magnetism opens broad avenues for fast and energy-efficient future data processing technologies essential to keep up with our data hunger.'' (2021-02-12)

Seismic surveys using fin whale songs
Fin whale song - one of the strongest animal calls in the ocean - can be used as a seismic source for probing the structure of Earth's crust at the seafloor, researchers report. (2021-02-11)

Low carbon transport at sea: Ferries voyage optimization in the Adriatic
What CO2 savings are potentially attainable through path optimization? How much can ferries' carbon intensity be decreased? What is the role of waves and currents? A new study led by the CMCC Foundation shows how the future least-CO2 ferry routes could look like. (2021-02-09)

'Multiplying' light could be key to ultra-powerful optical computers
New type of optical computing could solve highly complex problems that are out of reach for even the most powerful supercomputers. (2021-02-08)

Synchronization of brain hemispheres changes what we hear
Most of the time, our brain receives different input from each of our ears, but we nevertheless perceive speech as unified sounds. This process takes place through synchronization of the areas of the brain involved with the help of gamma waves, neurolinguists at the University of Zurich have now discovered. Their findings may lead to new treatment approaches for tinnitus. (2021-02-08)

Healthy oceans need healthy soundscapes
Rain falls lightly on the ocean's surface. Marine mammals chirp and squeal as they swim along. The pounding of surf along a distant shoreline heaves and thumps with metronomic regularity. These are the sounds that most of us associate with the marine environment. But the soundtrack of the healthy ocean no longer reflects the acoustic environment of today's ocean, plagued with human-created noise. (2021-02-05)

NANOGrav finds possible 'first hints' of low-frequency gravitational wave background
In data gathered and analyzed over 13 years, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Physics Frontiers Center (PFC) has found an intriguing low-frequency signal that may be attributable to gravitational waves. (2021-02-04)

RUDN University mathematicians developed new approach to 5g base stations operation
Mathematicians from RUDN University suggested and tested a new method to assess the productivity of fifth-generation (5G) base stations. The new technology would help get rid of mobile access stations and even out traffic fluctuations. (2021-02-03)

How do electrons close to Earth reach almost the speed of light?
In the Van Allen radiation belts, electrons can reach almost speed of light. Hayley Allison and Yuri Shprits, German Research Centre for Geosciences, have revealed conditions for such strong accelerations. They had demonstrated in 2020: during solar storm plasma waves play a crucial role. However, it remained unclear why ultra-relativistic electron energies are not achieved in all solar storms. In Science Advances they now show: extreme depletions of the background plasma density are crucial. (2021-02-02)

Backreaction observed for first time in water tank black hole simulation
Scientists have revealed new insights into the behaviour of black holes with research that demonstrates how a phenomenon called backreaction can be simulated. (2021-02-01)

Traffic noise makes mating crickets less picky
New research has found that the mating behaviour of crickets is significantly affected by traffic noise and other man-made sounds. When man-made noise pollution was present, the females didn't take into account the courtship song of the male crickets during mating. As the courtship song is energetically costly and provides crucial information about the health of the male, this could affect long-term population viability as females could choose less suitable mates. (2021-02-01)

Socioeconomic, demographic and urban factors influence the spread of COVID-19
Per capita income, population volume and density, the structure of cities, transport infrastructure or whether districts have their own schools are all factors that can affect the spread of COVID-19. This has been confirmed by a study carried out in 73 districts in Barcelona (Spain) by researchers from the Universitat Rovira i Virgili, the results of which have been published in the Journal of Public Health. (2021-01-31)

Optimal information about the invisible
Laser beams can be used to precisely measure an object's position or velocity. Normally, a clear, unobstructed view of this object is required. Irregular environments scatter the light beam - but as it turns out, precisely this effect can be used to obtain optimum information in difficult situations. (2021-01-25)

Adding or subtracting single quanta of sound
Researchers perform experiments that can add or subtract a single quantum of sound--with surprising results when applied to noisy sound fields. (2021-01-25)

Magnetic waves explain mystery of Sun's outer layer
in a new study published in The Astrophysical Journal, researchers combined observations from a telescope in New Mexico, the United States, with satellites located near Earth to identify a link between magnetic waves in the chromosphere and areas of abundant ionised particles in the hot outer atmosphere. (2021-01-22)

New biodegradable polyurethane foams are developed from wheat straw
The polyurethane foams have several industrial uses. Now, a new paper, published on the front page of Polymers, was able to obtain them from biomass in order to avoid using petroleum by-products in their manufacturing (2021-01-19)

Spreading the sound
Tsukuba University scientists describe the diffusion of sound in disordered materials, such as glass, using a new mathematical model. This work may lead to stronger and cheaper displays for touchscreen devices. (2021-01-15)

Glass frogs living near roaring waterfalls wave hello to attract mates
A University of California, Berkeley, conservationist has discovered that the glass frog Sachatamia orejuela can be added to the list of species that make use of visual cues in response to their acoustic environments. This is the first time a member of the glass frog family (Centrolenidae) has been observed using visual communication in this manner. (2021-01-15)

Posidonia marine seagrass can catch and remove plastics from the sea
Posidonia oceanica seagrass -an endemic marine phanerogam with an important ecological role in the marine environment- can take and remove plastic materials that have been left at the sea, according to a study published in the journal Scientific Reports. The article's first author is the tenure-track 2 lecturer Anna Sànchez-Vidal, from the Research Group on Marine Geosciences of the Faculty of Earth Sciences of the University of Barcelona (UB). (2021-01-14)

Galaxies hit single, doubles, and triple (growing black holes)
When three galaxies collide, what happens to the huge black holes at the centers of each? A new study using NASA's Chandra X-ray Observatory and several other telescopes reveals new information about how many black holes are furiously growing after these galactic smash ups. (2021-01-14)

Getting romantic at home wearing an EEG cap
Research into the neuronal basis of emotion processing has so far mostly taken place in the laboratory, i.e. in unrealistic conditions. Bochum-based biopsychologists have now studied couples in more natural conditions. Using electroencephalography (EEG), they recorded the brain activity of romantic couples at home while they cuddled, kissed or talked about happy memories together. The results confirmed the theory that positive emotions are mainly processed in the left half of the brain. (2021-01-13)

Singing a tumor test song
Singing may be the next-generation, noninvasive approach to determining the health of a patient's thyroid. When a person sings, the vibrations create waves in the tissue near the vocal tract called shear waves. If a tumor is present in the thyroid, the elasticity of its surrounding tissue increases, stiffening, and causing the shear waves to accelerate. Using ultrasound imaging to measure these waves, researchers can determine the elasticity of the thyroid tissue. (2021-01-12)

'Galaxy-sized' observatory sees potential hints of gravitational waves
Scientists believe that planets like Earth bob in a sea of gravitational waves that spread throughout the universe. Now, an international team has gotten closer than ever before to detecting those cosmic ripples. (2021-01-11)

Arecibo observatory helps find possible 'first hints' of low-frequency gravitational waves
Data from Arecibo Observatory in Puerto Rico has been used to help detect the first possible hints of low-frequency disturbances in the curvature of space-time. The results were presented today at the 237th meeting of the American Astronomical Society, which was held virtually, and are published in The Astrophysical Journal Letters (2021-01-11)

Guinea baboons grunt with an accent
Vocal learning leads to modification of call structure in a multi-level baboon society (2021-01-06)

First glimpse of polarons forming in a promising next-gen energy material
Polarons affect a material's behavior, and may even be the reason that solar cells made with lead hybrid perovskites achieve extraordinarily high efficiencies in the lab. Now scientists have used an X-ray free-electron laser to directly see and measure the formation of these ephemeral atomic lattice distortions for the first time. (2021-01-04)

Music-induced emotions can be predicted from brain scans
Researchers at the University of Turku have discovered what type of neural mechanisms are the basis for emotional responses to music. Altogether 102 research subjects listened to music that evokes emotions while their brain function was scanned with functional magnetic resonance imaging (fMRI). The study was carried out in the national PET Centre. (2020-12-28)

Surveys identify relationship between waves, coastal cliff erosion
Researchers have always known that waves were an important part of the cliff erosion process, but they haven't been able to separate the influence of waves and rain before. After decades of debate over the differing roles that both play, new findings provide an opportunity to improve forecasts. (2020-12-28)

Disposable surgical masks best for being heard clearly when speaking, study finds
Researcher Ryan Corey recently heard from a friend who teaches at a school where some of the students have hearing loss. The friend wanted to know if he had any ideas to help her communicate with these students while wearing a mask to slow the spread of COVID-19. Corey, who also has hearing loss, did not know what to tell her. So, he headed to the Illinois Augmented Listening Laboratory to look for solutions. (2020-12-23)

Perfect transmission through barrier using sound
A research team led by Professor Xiang Zhang, President of the University of Hong Kong (HKU) when he was a professor at the University of California, Berkeley, (UC Berkeley) has for the first time experimentally proved a century old quantum theory that relativistic particles can pass through a barrier with 100% transmission. (2020-12-23)

Experiment takes 'snapshots' of light, stops light, uses light to change properties of matter
The team generated a movie of how light waves churn on their nanometer wavelength scale by imaging electrons that two light photons coming together cause to emit from the surface. (2020-12-23)

How our brains track where we and others go
As COVID cases rise, physically distancing yourself from other people has never been more important. Now a new UCLA study reveals how your brain navigates places and monitors someone else in the same location. (2020-12-23)

Quantum wave in helium dimer filmed for the first time
For the first time, an international team of scientists from Goethe University and the University of Oklahoma has succeeded in filming quantum physical effects on a helium dimer as it breaks apart. The film shows the superposition of matter waves from two simultaneous events that occur with different probability: The survival and the disintegration of the helium dimer. This method might in future make it possible to track experimentally the formation and decay of quantum Efimov systems. (2020-12-23)

Controlling cardiac waves with light to better understand abnormally rapid heart rhythms
Over 300,000 people die each year in the US due to sudden cardiac death. In many cases, sudden cardiac death is caused by abnormally rapid heart rhythms called tachycardias, which means the heart cannot pump adequate blood to the body. In Chaos, researchers use mice to study tachycardias and find there are intrinsic mechanisms that exist in heart tissue that they hypothesize lead to the self-termination of rapid cardiac rhythm. (2020-12-22)

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