Articles tagged with Acoustics
Researchers have developed a new acoustic wave-producing technology on an electronic chip, enabling customizable curved waves for trapping objects, routing wave information, and transporting fluids. This innovation has significant potential in medical applications, such as noninvasive surgery and biosensors.
Researchers use smartphone microphones to detect sound waves that can penetrate through rubble, helping locate trapped victims. The method achieved an error of 5.04 degrees away from the hypothetical victim in a field test on a disaster training site.
Researchers develop sustainable and efficient pest control method that doesn't harm bees, targeting vulnerable species like greater and lesser wax moths. The technique uses ultrasonic signals to deter the pests, offering a potential solution to declining bee populations and food security concerns.
The Hearing Protection Optimization Tool translates acoustic and psychoacoustic factors into clear visuals, helping users compare different hearing protection devices. The tool matches users with regulatory-approved HPDs based on their noise environment and preferences.
Researchers used NASA's measurements to simulate sound propagation on Mars, providing insight into weather and terrain effects on acoustic propagation. The study focused on the Jezero crater, where it simulated how sound moves through complex terrains, helping scientists understand how other atmospheres compare to Earth's.
A team of researchers created a metamaterial that can transfer sound waves between air and water. The device, made from aluminum and steel plates, works by passing vibrations through its structure to facilitate communication between underwater and airborne vehicles.
A new study assesses various wall and floor types for their climate impact and acoustic performance, finding that timber outperforms standard steel studs in terms of climate friendliness. The research also highlights the importance of considering both acoustic comfort and environmental sustainability when designing buildings.
A study by Shimpei Ikegami found that vertical 'bop' music is characterized by clearer beats and percussive sounds, while horizontal 'sway' music is smoother with less percussion. Listeners' directional dancing inclinations matched the musicians' intended expressions.
Researchers have designed a quieter dental drill to address the anxiety-causing sound of traditional drills, which can reach nearly 20 kilohertz. The new design optimizes blade geometry and exhaust port to minimize noise while maintaining performance, with the goal of reducing discomfort in patients.
A new neural network developed by Naveen Dhar can filter out false positives in gunshot detectors, providing accurate alerts for on-the-ground intervention. The system uses a web of autonomous recording units and a central hub to analyze audio data and pinpoint the location of gunshots.
A team of researchers designed a custom approach sound library for electric vehicles using low-frequency noise, which was found to be more effective at alerting pedestrians. The sounds were tested with volunteers and ranked highly on criteria such as urgency and noticeability.
Researchers analyzed the linear stability of a two-dimensional compressible Euler-Euler system around planar Couette flow. They found that when sound speeds align, the drag force acts as a stabilizer, controlling turbulence growth rates. This study provides new mathematical ideas for turbulence control.
Researchers found that male elephant seals respond faster and change posture when hearing recorded calls of their old rivals. The seals also showed less aggressive behavior towards subordinate rivals. This suggests that the seals can remember individual voices even after a year.
Researchers have developed a method to generate and detect sound waves at sub-terahertz frequencies using optically driven devices. The discovery was made possible by launching shear hypersound pulses with exceptionally large amplitudes in metal halide perovskites.
Researchers from Keio University Global Research Institute successfully generated orbital currents using sound waves, establishing a foundation for integrating acoustic technology with orbitronics. The discovery paves the way for next-generation electronic devices.
High-volume noise exposure in a mouse model of early-stage Parkinson's disease slowed movement and reduced balance, suggesting a connection between sound processing and movement areas. Chronic noise exposure mimicked Parkinsonian symptoms by damaging dopamine-producing cells.
Researchers developed a non-destructive testing system using bubble wrap bursts, detecting objects within a 2% error margin without electricity or heavy equipment. The system harnesses the acoustic characteristics of bubble wrap bursts to identify internal obstructions in pipes.
In her book 'Sonic Socialism: Crisis and Care in Pandemic Hanoi', Christina Schwenkel explores how Vietnam used sound technologies to inform, regulate, and connect people during the pandemic. The country's success was largely due to its rapid communication systems, including loudspeakers and public health videos.
Researchers discovered that neurons in the brain's auditory cortex show large bursts of activity tied to specific moments in a task, suggesting a deep connection between behavior and sound processing. This 'tuning' mechanism enables the brain to produce smaller but more distinctive responses to sounds guiding task performance.
Researchers found CI sound quality leads to a 32% variance in users' quality of life, while speech recognition has virtually no predictive power. The study challenges decades of clinical practice focusing on speech understanding in quiet environments.
Researchers at CUNY ASRC introduce twistelastics, a technique using tiny rotations to manipulate mechanical waves, allowing unprecedented adaptability in sound and vibration control. The breakthrough enables flexible wave behavior for applications in medical imaging, consumer electronics, and microfluidics.
A study of individuals with autism, fetal alcohol syndrome, and typical hearing found that cognitive ability significantly impacted successful speech perception in noisy environments. The researchers discovered a highly significant relationship between intellectual ability and multitalker listening challenge scores.
Mizzou researchers have discovered a way to 'listen' to molecules moving faster than the speed of sound, using photoacoustic spectroscopy. This technique could help unravel mysteries of astrochemistry and offer clues about the universe's composition, star formation, and life origins.
Beaked whales are recorded in the Foz do Amazonas Basin using passive acoustic monitoring, demonstrating their first documentation in Brazilian waters. The study contributes to understanding cetacean biodiversity and showcases the effectiveness of acoustic monitoring for categorizing elusive sea creatures.
A new study found that vibrato is the most significant vocal attribute in determining an opera singer's score, while acoustic features like SPR and HNR have a greater impact than previously thought. The research provides objective insights into how judges evaluate performances and offers tools for vocal training.
A new study links the size of male proboscis monkeys' noses to their unique vocal characteristics, suggesting a significant impact on individual identity. The findings shed light on the complex interplay between anatomy, acoustics, and social behavior in animals, with potential implications for human communication.
Researchers at Boston University developed a new ultra-open metamaterial that effectively silences a broader range of unwanted sounds while preserving airflow. This breakthrough enables practical acoustic silencing in diverse settings, such as factories, offices, and public spaces.
Researchers have developed a metamaterial absorber spanning seven octaves that demonstrates an average absorption coefficient of 0.944, covering the entire audible spectrum. The absorber's compact profile and ultrabroadband performance show promising applications in aerospace noise reduction and precision acoustic environment control.
Researchers developed a low-cost visual microphone that listens with light instead of sound, capturing tiny vibrations on surfaces caused by sound waves and turning them into audible signals. The system uses single-pixel imaging to detect sound and can recover high-quality audio using everyday objects like paper cards and leaves.
A research team has experimentally demonstrated a nonlinear wave phenomenon that changes its frequency depending on the direction of incoming waves. The system exhibits different responses to waves entering from one side versus the other, with potential applications in medical ultrasound imaging and noise control.
A study found that evaluators' musical experience influences the sight-over-sound effect, reducing its impact for those with auditory expertise. The study used Japanese high school brass band competitions and found no significant evidence of the effect in musicians, but a stronger presence in non-musicians.
A study published in PLOS Biology found that long-term musical training can mitigate age-related declines in speech perception by promoting a more youthful pattern of brain activity. This suggests that musical training may build cognitive reserve, helping older adults maintain optimal cognitive performance.
Researchers from Osaka Metropolitan University discovered that excessive ultrasonic power can distort wave patterns, suppressing bubble growth and reducing chemical reaction rates. Their findings provide key insights into the balance between sound waves, fluid motion, and bubble physics.
Rice University professor Lei Li has received a NSF CAREER Award to develop wearable medical imaging technology capable of visualizing deep tissue function in real time. The project aims to miniaturize hospital-grade imaging systems into compact, energy-efficient wearables.
In a recent study, researchers found that loudness is a strong indicator of the speaker's facing direction, but also rely on spectral cues. The findings have implications for designing more realistic virtual interactions, particularly those involving human speech, and can enhance user experience in immersive media.
A new study from Cornell and Ole Miss universities reveals the hidden science of hand clapping, showing that it involves a cavity of air being compressed and pushed out of a small space. The researchers found that the volume and duration of claps can be modified by factors such as speed and skin softness.
A study conducted at a Japanese school found that classrooms with sound-absorbing materials experienced reduced crying rates among young children, who were able to communicate more clearly. The research aimed to raise awareness about the importance of acoustics in educational settings and inspire regulations.
The University of Oldenburg has secured funding for three research clusters: Hearing4all, Ocean Floor, and NaviSense. These clusters aim to improve hearing loss prediction, diagnosis, and treatment, as well as animal navigation research. The funding enables the continuation of high-quality research with social relevance.
Researchers found that coral larvae settle near speakers in artificial reef environments, suggesting sound as an environmental cue. The study aims to develop scalable strategies using audiovisual remote sensing tools to monitor reef biodiversity.
Researchers found that plants increase sugar and nectar volume in response to bee buzzing sounds, altering their gene expression. This may be a survival strategy to improve reproductive success by attracting efficient pollinators.
Researchers have developed a technique to create spin in liquid droplets using ultrasound waves, concentrating solid particles suspended in the liquid. This allows for the creation of novel technologies for biomedical applications and research on rotating systems.
Researchers at Istanbul Galata University studied the history and architecture of Derinkuyu's ancient underground city to recreate its soundscape. The project aims to provide valuable information for scholars and inspire the design of future underground urban spaces.
Researchers at Purdue University have developed a metamaterial that can significantly reduce underwater noise generated by offshore wind farm installation. The technology, which uses carefully arranged plates to trap air and guide sound, achieves a 40-decibel reduction in noise levels.
Acoustic metamaterial enables pushing, rotating, and complex movements in 3D. Researchers can now move and position objects underwater without touching them directly, paving the way for applications like remote surgery and drug delivery.
Researchers from Brigham Young University and California State University, Bakersfield collected data on Falcon 9 rocket sonic booms to understand their impact. They found that the magnitude of sonic booms can vary greatly with weather conditions, launch time, vehicle trajectory, and time of year.
Researchers built a data pipeline to train AI tools for childhood speech screening, addressing the lack of representative datasets. The resulting high-quality dataset enables faster and more accurate diagnoses, especially in areas with limited access to specialists.
Researchers use acoustics to identify corroded UXOs in shallow water, making them difficult to observe with standard sonar imaging techniques. The study helps provide better predictive tools for finding UXOs in civilian environmental demining efforts.
A study by Trinity Consultants identifies effective means of controlling data center noise, including sound barriers and low-frequency resonators. The goal is to create a quieter breed of data centers that can coexist with residential areas, protecting residents from excessive noise.
A team of researchers has found that sound waves can create standing waves in semi-open spaces, potentially enabling resonance in shapes with open sides. This discovery challenges the long-held assumption that resonance requires closed sides.
Scientists develop an ambisonic algorithm to simulate precise sound locations in 3D, reproducing sounds with high accuracy and precision. The AudioDome loudspeaker array achieves a spatial resolution comparable to human spatial acuity.
Researchers found significant bird song decline only where more than 99% solar obscuration occurred. The study used a novel neural network approach and controlled for human presence, revealing varied responses among different bird species.
Researchers at NCSA and UICOMP have created an improved, automated screening method for anxiety and depression disorders using machine learning and acoustic analysis of verbal fluency data. The new tool offers promise for overcoming barriers to diagnosis and treatment.
Researchers at EPFL have developed a novel acoustic system that can explore condensed matter and their macroscopic properties, circumventing the limitations of quantum phenomena. The system uses sound waves to model quantum probability waves, allowing for direct observation without perturbation.
A team of researchers developed an innovative acoustic method to detect hidden stones in coffee beans, preventing damage to grinding machines. The system uses empirical mode decomposition and field programmable gate arrays to identify stone presence with near-perfect accuracy.
The study found that the 'pop' sound is caused by sudden expansion of carbon dioxide and air mixture in the bottle, as well as a strong cooling effect, resulting in high decibel emissions. The liquid level rises after opening, causing sloshing due to momentum transfer from the lid hitting the glass.
A team of researchers at Tokyo University of Agriculture and Technology has developed a scaling model for transitional pressure development during acceleration. The study combines the incompressible and compressible flow theories to create a unified model that can be applied universally to various floors and liquid types.
Researchers have found evidence of songbirds forming social connections and potentially exchanging information about their migration routes through vocalizations. The study suggests that social cues play a significant role in shaping migration behaviors, particularly for young birds learning from observing other birds.
Researchers evaluated the noise impact of offshore wind farms on fishes and dolphins in the Pearl River Estuary. The study found that pile driving noise during construction can significantly affect marine animals, with predicted impact zones varying by species.
A 35,000-year-old ritual complex in the Manot Cave offers insight into the spiritual practices of Paleolithic hunter-gatherer groups. The discovery reveals evidence of human-made engravings, ash remains from fire, and acoustic tests that suggest a unique auditory experience for communal activities.
Researchers are developing a system to instantly conceal and anonymize voices through computer-generated speech. The technology will allow users to control factors like age, gender, and dialect in real-time conversations.