Articles tagged with Speed Of Sound
Researchers have discovered a wave-interference effect that makes sound energy appear to outrun fundamental limits without breaking physics. This finding could improve whale tracking by pinpointing the location of whales based on the phase of their calls.
Physicists from TU Darmstadt propose a new approach to define and measure the time required for quantum tunneling. They suggest using Ramsey clocks, which utilize the oscillation of atoms to determine the elapsed time. The proposed method may correct previous experiments that observed particles moving faster than light during tunneling.
Researchers developed a deep convolutional neural network to pinpoint cardiac catheter tip locations in photoacoustic images, achieving high precision and recall. The approach has the potential to replace fluoroscopy during cardiac interventions, leading to safer procedures.
A groundbreaking study reveals that linear defects in diamond can spread at speeds exceeding the speed of sound, which could impact our understanding of material strength, failure, and manufacturing. This discovery may lead to new insights into earthquake ruptures, structural failures, and precision manufacturing.
Skateboarders possess a unique sensory knowledge of cities, which can help mediate conflicts between those who enjoy and those who dislike the sport's sounds. By paying attention to sound, individuals can gain 'sonic' agency over spaces in the city.
WVU linguists analyze speech recordings to determine how intensity and duration shape pronunciation in American English and Spanish. The two-year study aims to redefine sound patterns across languages.
Researchers at Case Western Reserve University will conduct high-speed experiments with a projectile hitting a wall of water at 9,000 mph to study the effects on water and potential applications for national defense. The project aims to accurately predict damage from hypersonic vehicles and missiles.
A modelling study published in Scientific Reports found that diplodocid tails were unlikely to create a supersonic boom due to their slow movement speed. The authors simulated tail movements using a model and found that adding hypothetical structures to the end of the tail did not allow it to reach the speed of sound without breaking.
Perseverance mission has recorded the first ever sounds from Mars, showing that the planet is quiet due to low natural sound sources. The rover's microphone captured sounds within the human audible spectrum, including shock waves and helicopter flights.
Climate change alters ocean soundscapes, affecting marine life's survival and reproduction. Warmer waters speed up sound waves, impacting essential activities like feeding, fighting, and migration.
Researchers at the University of Nottingham have developed a groundbreaking technology to measure the microscopic elasticity of materials. By analyzing the speed of sound across the material's surface, they can reveal the orientation and inherent stiffness of small crystals, which is essential for material performance.
A new $1 million project at UCF aims to understand how raindrops interact with hypersonic shock waves. Researchers will use computer simulations and experiments to predict conditions for safe hypersonic travel. The knowledge gained could prevent damage and improve rocket launch accuracy.
The University of Central Florida has received a $1.5 million U.S. Department of Defense award to develop high-performance fuels for hypersonic propulsion. The project aims to create new solid fuels that can provide wider flammability limits and longer range while constraining volume.
Researchers found that quantum mechanics' influence on particles affects light emission, demonstrating wavefunction collapse and altering interference patterns. The study sheds new light on the counter-intuitive phenomenon, revealing a direct connection between light emission and quantum entanglement.
Researchers have discovered a new technique to locate the diffusion wake's signal in the quark-gluon plasma, a subatomic soup that flowed like a friction-free fluid after the Big Bang. This breakthrough may help scientists understand how matter emerged from this perfect fluid.
Researchers investigate acoustic analysis of underlying tissue in this groundbreaking study, revealing a small but quantifiable impact of superficial tattoos on acoustic responses. The findings suggest near-vertical transitions between areas of different sound speeds cause artifacts in ultrasound images.
Marianna Maiaru, a mechanical engineering assistant professor at UMass Lowell, has received a $450,000 grant from the Air Force to advance the development and processing of high-strength, high-temperature structural materials. Her project focuses on ceramic matrix composite (CMC) materials used in aerospace applications.
Researchers found bats map the world in units of time, perceiving insects as nine milliseconds away, not meters. This constant sense allows bats to orient themselves without calculating distance based on sound speed.
Echolocating bats use time-based distance estimates, regardless of air conditions. The study found that bat accuracy improved when closer to targets, suggesting an innate ability to discern surroundings in terms of time.
Researchers investigate shockwave boundary layer interactions, with a focus on transitional regime experiments and simulations. Better understanding of these interactions could prevent catastrophes in high-speed vehicles.
Sandia National Laboratories successfully completed the first flight test of the B61-12 nuclear bomb on the F-35A Lightning II fighter jet, demonstrating its compatibility and versatility. The test was part of a larger program to increase confidence in the bomb's reliability and effectiveness.
Researchers found the upper limit for the speed of sound to be around 36 km per second, which is faster than previously thought. This discovery has implications for various scientific fields, including materials science and condensed matter physics.
SwRI engineers conducted a series of tests to study hypersonic flight conditions using a light gas gun system. The research elucidated the effects of extreme heat on materials and geometries at speeds over Mach 10.
University at Buffalo aerospace engineer James Chen is working on a new study that aims to solve problems associated with exceeding the sound barrier. The research focuses on Austrian physicist Ludwig Boltzmann's classical kinetic theory, which uses gas molecules to explain everyday phenomena.
Researchers from Oregon State University have identified the mechanisms behind improved ignition using pulsed sparks, leading to better performance in combustion systems. The study found that higher spark frequencies result in increased kernel temperatures and growth rates, essential for successful ignition and combustion.
Researchers studied Felix Baumgartner's free fall and found that his irregularly shaped equipment allowed him to break the sound barrier faster than a smooth, symmetrical body. The investigation revealed that surface irregularities can reduce aerodynamic drag at speeds close to the speed of sound.
Researchers at NASA and Binghamton University developed a new material, boron nitride nanotubes (BNNTs), which can withstand extreme temperatures and stresses, paving the way for faster planes. The study found BNNTs could handle high amounts of stress and were extremely lightweight.
A team of researchers from Northeastern University has discovered a new mechanism that causes cracks to behave strangely in brittle materials, leading to catastrophic failure. The study's findings have the potential to help designers create stronger materials by understanding how fragile materials like glass and bone break.
Scientists studying climate change's impact on underwater sound propagation and sonar transmission. Warmer oceans increase sound speed, making detection of submarines more challenging.
The team discovered that broadbills produce their distinctive territorial wing song when the 6th and 7th primary wing feathers flutter in the wind. This discovery adds to Darwin's roll-call of birds that produce 'instrumental music' with their feathers.
Researchers at Sandia National Laboratories have found a way to alter the thermal conductivity of widely used material PZT using a small electric voltage. This breakthrough could lead to new technologies where controlling phonons is necessary, and has potential applications in computing, global communications, and other fields.
Researchers at the UK's National Physical Laboratory have performed the most accurate measurement yet of the Boltzmann constant, which could revolutionize the way we define temperature. The new definition directly links the unit of temperature to the basic physical reality of atomic vibrations.
EPL has published its first paper submitted from space, detailing experiments conducted on the International Space Station by German and Russian researchers. The study reports on the measurement of the speed of sound within complex plasmas under microgravity conditions, providing new insights into material properties.
Researchers at the University of Calgary have made a groundbreaking discovery about the Earth's core by analyzing seismic wave speed. The study reveals that the outer core is well mixed and lacks stratification, providing new insights into the planet's magnetic field and formation.
Researchers at Ohio State University have designed a new control system software that can adapt to changing conditions during a flight, enabling experimental aircraft to fly faster than sound. The system performed flawlessly in computer simulations of flight maneuvers, guiding the jet along its trajectory and keeping it stable.
A new digital watermarking system protects music and media files from online pirates while ensuring high-quality playback for legitimate users. The system, developed by researchers at the University of Ottawa, embeds an image within the audio file to prevent piracy without compromising sound quality.
A Cornell study discovered that the sound of a word can reveal its grammatical role, affecting how it is processed in sentences. The researchers analyzed the sounds of over 3,000 nouns and verbs to show how phonological typicality influences comprehension.
Researchers have developed ultra-smooth diamond-like carbon that meets the requirements for ultra-high density magnetic storage devices. Additionally, scientists have used live pond snail nerve cells to implement neural memory on a semiconductor chip, while also studying how air bubbles slow sound waves in water.
Researchers at the Office of Naval Research created a national study to understand and predict abrupt wing stall (AWS) in aircraft. They developed new tools and procedures to assess an aircraft's susceptibility to AWS, which can be used to screen new wing designs earlier in their development phase.
A new kind of cruise missile engine, called a scramjet, has been tested to achieve Mach 6.5 speeds in simulated hypersonic conditions, outperforming traditional ramjets. The engine is being developed for use in the HyFly joint DARPA/ONR Flight Demo program, aiming to launch missiles at speeds up to Mach 6 and ranges of 600 nautical miles.
Dlott and colleagues used mid-infrared lasers to excite hydroxyl stretching vibrations in alcohols, then probed with visible light to monitor energy flow. The study found that energy transfer occurs through bond interactions, increasing speed by about 400 femtoseconds for each methylene group.
Professor Alain Goriely explains that whip cracking is caused by a sonic boom generated by the loop in the whip, which travels at one speed but parts of it travel twice as fast. The tip's motion is also analyzed to reveal why it wasn't heard when hitting the speed of sound
Scientists have found that deformation can bypass the sound barrier in materials, leading to supersonic dislocations. These findings challenge conventional wisdom and open up new avenues for understanding high-speed deformation in engineering materials.