Articles tagged with Sound Pressure
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A team of researchers at Kyoto University has found that cells can hear and respond to sound waves, leading to potential applications in medicine and healthcare. The study used acoustic pressure to induce cellular responses, revealing the suppression of fat cell formation and activation of mechanosensitive genes.
Researchers developed an equation describing pressure wave propagation in bubbly flows, confirming that changes in tube cross-sectional area contribute to pressure wave attenuation. The rate of change in tube cross-sectional area is a key parameter governing pressure wave attenuation.
Researchers at Osaka Metropolitan University have found key indicators for assessing chemical activity and temperature of active bubbles generated by ultrasonic waves. The study provides new insights into the relationship between bubble temperature and chemical activity, enabling more precise control of chemical reactions.
Concordia researchers develop a novel method of 3D printing using acoustic holograms, capable of creating complex objects quickly and at once. This technique, called holographic direct sound printing (HDSP), stores information of multiple images in a single hologram, allowing for the creation of multiple objects simultaneously.
Researchers propose a noninvasive method to track blood pressure using resonance sonomanometry, stimulating an artery with sound waves and measuring its response. The device showed promising results in initial human trials, with measurements closely matching those from traditional blood pressure cuffs.
Researchers discovered that fish like Danionella cerebrum use a combination of sound pressure and particle velocity to detect the direction of sounds underwater. This mechanism allows them to locate prey or predators despite the challenges of directional hearing in water.
Researchers found spider webs match acoustic particle velocity for wide range of sound frequencies. Spider silk responds to air particles in a sound field, not just sound pressure, and may inspire new microphone designs.
Researchers found that tiger beetles respond to bat echolocation by producing their own ultrasonic signal, which they believe is a defense mechanism. The beetles' defensive chemicals are not effective at deterring bats, but the sound itself may be used to trick bats into thinking they are noxious.
A WVU study found that treating work like a game improves workers' productivity and engagement, but also increases stress levels. Gamification can boost completion times for repetitive tasks, but may push employees past their tolerance threshold, leading to frustration and physical demands.
A recent study investigated anomalous health incidents among US government personnel and their family members. The researchers found that individuals experiencing these incidents did not show significant differences in clinical measures compared to matched control participants, except for fatigue, posttraumatic stress, and depression.
The review discusses the optical aspects of QPAT, including mathematical models for light propagation and interaction with biological tissues. The authors outline two approaches to estimating chromophore concentrations from absorbed optical energy density data, highlighting the challenges associated with practical implementation, such ...
A research team at UNIST has developed a groundbreaking stretchable high-resolution multicolor synesthesia display that generates synchronized sound and light. This technology shatters preconceived boundaries in multifunctional displays, offering unparalleled optical performance and precise sound pressure levels.
Researchers at MIT have discovered that the sounds produced by rocks under different pressures can reveal their depth and strength, helping scientists identify unstable regions below the surface. This new method could aid in drilling for geothermal energy and understanding the Earth's crust.
Scientists have developed a tiny, simple setup to make precise pressure measurements using light and sound waves. This method enables exploration of extreme thermodynamics in nanolitre volumes, revealing new properties in unique thermodynamic states of materials.
Researchers at Shinshu University developed high-performance source-shifters using acrylonitrile butadiene styrene (ABS) resin, employing inverse design and topology optimization. The optimized structures can reduce the difference between emitted pressure fields to as low as 0.6%, enabling effective acoustic location camouflaging.
Researchers measured noise levels at locations around the launch pad, finding maximum sound levels exceeded predicted values by nearly 20 decibels. The study's findings will help validate and improve existing noise prediction models to protect equipment and surrounding environments.
Researchers at Max Planck Institute and Heidelberg University have developed a technology to assemble matter in 3D using sound waves. They successfully printed microparticles, gel beads, and biological cells into three-dimensional shapes, paving the way for novel 3D cell culture techniques.
A research team developed a smart mask integrating an ultrathin soundwave sensor that detects breathing, coughing, and speaking sounds. The mask uses machine-learning algorithms to identify respiratory diseases and improve public health by enabling prolonged monitoring.
Researchers at the University of Vienna have discovered that Asian elephants emit low-frequency rumbles through both their trunk and mouth, a finding that challenges existing knowledge on animal communication. This novel discovery suggests that mammals may be more flexible in their vocalizations than previously thought.
Scientists at the University of Tsukuba have developed a theoretical model to describe the motion of ultrasound waves in liquids containing multiple bubbles, which may enable advances in diagnostic and therapeutic applications of ultrasound technology. The new equations can also be used to enhance microbubble-enhanced medical applicati...
Researchers at Concordia University have developed a new platform technology called direct sound printing (DSP), which uses soundwaves to produce new objects. The process creates sonochemical reactions in minuscule cavitation regions, generating pre-designed complex geometries that cannot be made with existing techniques.
Orb-weaver spiders have been found to use their massive webs as auditory arrays, capturing sounds and giving them advanced warning of prey or predators. The researchers used a special quiet room and placed a mini-speaker near the web, causing the spider to detect and respond.
Researchers at NIST demonstrate a faster and more accurate way to calibrate microphones using lasers. The new technique surpasses the current industry standard, offering potential for commercial applications in industries like factories and power plants.
Researchers from Eindhoven University of Technology used a high-speed camera and 2176 microphones to measure the precise origin of the hummingbird's sound. The team found that the wing's pressure difference generates the hum, which is essential for lift-off and hovering.
A study by Japan Advanced Institute of Science and Technology reveals that bone-conducted (BC) speech transmission affects perception similarly to air-conducted speech. The team found that RT vibrations support frequencies up to 1 KHz, while EC pressure accentuates frequencies in the 2-3 KHz range.
Researchers have developed a chip-based technology that generates high-resolution sound profiles with intense sound pressure. This allows for more effective and easier ultrasound therapy, potentially benefiting patients with cancer, brain conditions, and other diseases. The technology also enables the creation of organoid models for dr...
Bats must find a compromise between energy consumption and efficient echolocation, as louder calls increase energy expenditure. High-intensity echolocation calls are costly and require significant additional muscle activity, particularly above 130 dB.
Researchers discovered that bush-crickets' ear canals work similarly to mammals' ears, amplifying sound and modulating pressure. This breakthrough could lead to the development of better acoustic sensors for human use, enhancing directional hearing and monitoring applications.
Scientists investigate how architectural aspects of workplace design change the way sound, including music and conversation, affect workers. Researchers found that 50 dBA of conversation or music coming from behind bothered individuals less than 60 dBA of similar noise coming from the side.
Advanced MRI scans revealed differences in brain structure and function among US government personnel exposed to unusual sounds, pressure, or vibrations. The study found variations in white matter volume, gray matter regions, and functional connectivity in specific brain networks.
A new CDC study cautions that sports whistles used by referees, coaches, and others are a risk factor for hearing loss. The study measured the acoustic signature of 13 whistle brands, finding sound levels between 100-120 decibels, which can exceed safe daily exposure within just a few seconds.
Researchers at the University of Connecticut created a sensor using iron oxide nanoparticles in silicone that can detect pressure, temperature, and vibration, as well as magnetic fields and sound waves. The sensor could potentially help burn victims feel again and serve as an early warning for workers exposed to high magnetic fields.
A University of Miami medical team reported acute neurosensory symptoms in 25 US diplomats who experienced severe symptoms after exposure to a unique sound and pressure phenomenon. The study found evidence of balance disorders, cognitive dysfunction, and psychological issues, which do not resemble traumatic brain injury.
The study analyzed the influence of belt structure on tire vibration and noise, revealing that optimized belt structures can reduce vibration noise by 7.55 dB. The findings provide a theoretical basis for developing low-noise tires in the future.
Researchers Anthony Nash and Lauren von Blohn investigated the acoustic properties of exploding eggs in a microwave oven. They discovered that the yolk's temperature is consistently higher than the surrounding water bath, leading to superheated pockets that cause a chain reaction resulting in an explosion-like phenomenon.
Researchers at Binghamton University have developed a new type of microphone that uses spider silk to improve directional sensing across a wide range of frequencies. The study, led by Professor Ron Miles and graduate student Jian Zhou, found that the fine fibers are able to pick up velocity rather than pressure of air waves.
NASA's Aqua satellite captured a last look at Tropical Depression Beatriz as it weakened to a remnant low-pressure area and moved into the Gulf of Mexico. The imagery showed that cloud top temperatures were near 230 kelvin, indicating weakened thunderstorm activity.
Researchers at ETH Zurich have developed a new principle to measure external forces using parametric oscillation. The discovery has advantages for small sensors, enabling the creation of extremely precise force meters.
System 99L is a tropical low pressure area located over Hispaniola, producing disorganized shower and thunderstorm activity. Heavy rainfall, flash floods, and mudslides are likely over the region, with conditions becoming more favorable for development early next week.
Tropical Depression Fiona has weakened into a post-tropical depression, with maximum sustained winds decreased to near 30 mph. The low pressure area is expected to move northwestward and then westward, gradually weakening over the next couple of days.
Scientists at NPL have developed a new optical method for directly measuring sound pressure, providing direct traceability to fundamental SI base units. This method can be used to calibrate any acoustic device without assumptions regarding geometry and sound field characteristics.
Tropical Depression Fung-Wong's clouds had cloud-top temperatures near -63F/-53C over Japan's northern Ryuku Islands. The depression moved to the northeast at 11 knots (12.6 mph/20.3 kph) before becoming an extra-tropical storm.
NASA's Aqua satellite captures infrared data on Tropical Storm Halong and developing System 96W, showing powerful thunderstorms with potential for heavy rainfall. Halong is expected to strengthen to typhoon status by August 1.
The NASA Aqua satellite detected a low-pressure area that became Tropical Depression 2, with cloud top temperatures exceeding -63F/-52C indicative of strong thunderstorms and powerful uplift.
Tropical System 92B has weakened due to persistent easterly vertical wind shear, according to NASA's infrared data. The Joint Typhoon Warning Center downgraded the potential for significant tropical cyclone development within the next 24 hours to medium.
Two low-pressure areas, System 94P (Fletcher) and 95S, were detected by NASA's Aqua satellite over Australia. Fletcher remains in the Gulf of Carpentaria with disorganized convection, while System 95S develops near Darwin with heavy rainfall potential.
NASA's Aqua satellite detected a low-pressure system with strong convection and high thunderstorm cloud tops in the northern Indian Ocean. The system is expected to develop into Tropical Depression 06B and move north-northeastward towards the Bay of Bengal, with wind speeds estimated at 25-30 knots.
System 90L has developed in the eastern Atlantic Ocean and NASA's Aqua satellite captured infrared data on the clouds, revealing strongest thunderstorms northeast of the center. The non-tropical low is generating tropical-storm-force winds but is expected to be affected by strong upper-level winds shear, likely preventing organization.
Brazilian researchers assessed caxirola sound levels and found them comparable to a normal conversation, with only slight differences from vuvuzela noise. They also analyzed instrument vibrations, finding variations in frequency and intensity over time.
Tropical Depression Yagi has weakened due to cooler waters and an upper-level low pressure area, causing it to lose its circulation and become elongated. Its maximum sustained winds dropped to 30 knots on June 12, leading to forecasters predicting dissipation by June 13.
Tropical Storm Ewiniar remains tropical despite being embedded in a subtropical area of low pressure off Japan's east coast. The storm is still experiencing strong convection and thunderstorms, with maximum sustained winds near 63.2 mph/102 kmh.
Tropical Storm Kristy is weakening due to adverse atmospheric conditions and cooler waters, while another system is developing with a 50% chance of formation over the weekend. Environmental conditions are expected to improve for the second low-pressure area, but satellite data shows it has become disorganized.
A NASA satellite has spotted a developing Atlantic tropical low with strong, high thunderstorms indicating organization and strength. The system, System 99L, is forecast to have a 70% chance of becoming a tropical depression in the next two days.
A medium-chance tropical depression is possible in the south-central Gulf of Mexico, with NASA satellites providing key data on the area's low pressure. The system is expected to bring heavy rainfall and flooding to parts of Cuba, western Cuba, and southern Florida over the next couple of days.
Scientists developed the first laboratory system to evaluate pile driving's effect on fish, finding individual blows above a certain sound level can irreparably harm them. The recommended sound threshold aims to minimize harm to marine animals while permitting ocean development.
Alberto weakened from a tropical storm to a tropical depression as seen by NASA's Aqua satellite. The National Hurricane Center expects it to continue moving northeast and speed up, eventually becoming a post-tropical remnant low pressure area.
System 96W is consolidating with bands of thunderstorms wrapping around the center, indicating a strengthening tropical depression. Forecasters predict a medium chance of strengthening due to favorable wind conditions and warm sea surface temperatures.
System 92S is a low-pressure area that has been watching by NASA satellites for days, with cloud temperatures cooling and storms intensifying as it moves over northern Madagascar. The Joint Typhoon Warning Center predicts a high chance of development into a tropical cyclone in the next 24 hours.
A new study demonstrates that words which sound better to speakers of a language have a higher chance of being created, influencing language evolution over time. The research reveals the interconnectedness of linguistic rules and suggests that humans do not learn language in a simple, context-independent manner.
Tropical Storm Ophelia formed in the Atlantic Ocean after strengthening from low-pressure System 98L. The storm has maximum sustained winds near 45mph and is moving west at 14mph.