The American Institute of Physics and the Acoustical Society of America offer science writing awards in acoustics. The most recent winners include "Snap, Crackle and Pop" by Bennett Daviss and "Acoustic Surgery" by Shahram Vaezy et al.
Researchers from Penn State developed expendable microphones to locate survivors in collapsed buildings. The team found that placing microphones in voids reduces surface noise, allowing acoustic search to continue without interfering with rescue operations.
The new flat motor can be configured in various formats, including a thin version that can drive changes in airplane wing camber or serve as the drive element in compact laptop computers. The prototype has reached high speeds and maximum torque of 0.4 Nm, with cost estimates as low as $10 for mass production.
Researchers discovered that fusiform cells in the cochlear nucleus integrate acoustic information with head and ear position information to pinpoint sound sources. The study found that synapses transmitting acoustic information are stable, while those carrying head and ear position information exhibit plasticity.
Researchers developed a technique that uses acoustic energy to kill bacteria on medical instruments, reducing the need for heat and chemicals. The method achieved a 90% kill rate using a combination of pressure and isopropyl alcohol, with potential benefits for minimizing infection risk and reducing equipment downtime.
Researchers at Penn State have developed a small 'thermoacoustic refrigerator' that uses sound energy to generate cooling, potentially replacing chemical refrigerants. The device operates near resonance frequencies and achieves efficiencies as high as 89% without lubricants or sliding seals.
A team of researchers at Penn State has developed a compact chiller that uses sound waves to cool ice cream, achieving temperatures below freezing point with minimal energy consumption. The innovative system, powered by high-amplitude sound energy, has the potential to revolutionize the way we produce and consume refrigerated foods.
Researchers developed a new circuit that harnesses vibrations to generate up to 50 milliwatts of power, surpassing the output of simple energy harvesting circuits. The adaptive piezoelectric energy harvesting circuit can be used in various applications, including wearable devices, sensor networks, and smart home security systems.
A new approach to designing smart structures has been developed, using embedded systems with microprocessors and sensors. The system allows for scalability without increasing weight, power consumption, or cost, making it a promising solution for industries such as aerospace and automotive.
The award honors entries that meet accessibility, relevance, accuracy, and quality criteria, from various media including video, books, newspapers, and audio broadcasts. Submissions must include author information and contact details.
Researchers develop a condition-based monitoring system using radar-like signals to detect material damage in aircraft and vehicles. The system can accurately determine the location and severity of damage, even when temperature changes affect material behavior.
A team of psychologists studied 1024 laughter episodes from young adults watching funny video clips. They found interesting sex differences in laugh types and pitches, with women producing more song-like laughs than men. Laughter is surprisingly high-pitched, with some laughs reaching frequencies of over 2,000 Hz.
Researchers suggest deploying vibration-sensitive acoustic sensors on Europa's surface to probe the interior structure and search for signs of life. Massive ice fractures generate unusual cracking sounds that could penetrate the thick ice layer and propagate through the underlying ocean.
Using actively controlled engine noise cancellation technology can reduce noise pollution, improve fuel efficiency and alleviate environmental restrictions. This new approach eliminates the need for additional weight, increasing the viability of the concept.
Researchers at Georgia Tech have developed a new method for detecting buried land mines by using sound waves to create tiny soil disturbances and precision radar to measure the resulting movement. This technique can differentiate between mines and other buried objects, reducing false alarms and increasing detection accuracy.
Future wireless devices may use multiple antennas to outperform single-antenna versions, reducing interference and increasing reception accuracy. This technology could enable three times as many users to operate within the same frequency band.
Researchers at Purdue University are creating plastic and mathematical models to analyze the aerodynamic sound of human speech. They aim to predict the consequences of surgery on the throat and develop a method to better synthesize and characterize voices for robotics and voice-recognition purposes.
Penn State graduate student Ray Wakeland will demonstrate the fire organ, a heat-driven instrument producing musical sounds, and the daxophone, a unique sound-producing instrument. He will also showcase the Long String Instrument, a large bronze harp-type string instrument that produces ethereal music.
Researchers found that only two out of 32 classrooms met the American Speech-Language-Hearing Association guidelines for background noise level and reverberation time. Background noise was a significant problem in classrooms, with levels ranging from 28 to 68 decibels, and reverberations lasting between 0.2 and 1.27 seconds.
The ONR report highlights the need for further research into the effects of underwater noise on marine life, including non-hearing physiological effects and behavioral changes. The report also reviews current scientific knowledge and expert opinions on the topic, emphasizing the importance of understanding the impacts of human activiti...
Researchers at Georgia Tech have designed 'Quiet Curtains' that combine audio privacy and aesthetics to reduce nocturnal noise in nursing homes. The high-tech drapes can block unwanted decibels by up to 12 dB, providing a significant improvement in patients' rest and quality of life.
Researchers will gather at a record-breaking acoustics meeting to discuss topics including the dangers of noise-induced hearing loss in day-care centers and the potential for thermacoustic refrigerators to create musical tones. The event features over 1,950 abstracts submitted by scientists from 44 countries.
Cathleen Synge Morawetz, a NYU professor emerita, is the first woman to receive the National Medal of Science for mathematics. Her pioneering work in partial differential equations and wave propagation has led to applications in aerodynamics, acoustics, and optics.
A team of Penn State materials scientists has developed a new polymer material that can move significantly when an electric field is applied. The material, Poly(vinylidene fluoride-trifluoroethylene) Copolymer, exhibits electrostrictive properties and shows potential for use in artificial muscles, skin, and organs.
Researchers at Cornell University discovered that the auditory portion of the midbrain uses acoustic qualities to isolate one signal as potentially interesting, similar to the cocktail party effect. This ability helps female midshipman fish locate the hum of interest among multiple signals.
Penn State researchers develop a finite difference method to simulate sonic boom noise for both simple and complex ocean surfaces. The new technique allows for accurate predictions of underwater noise, paving the way for the development of supersonic passenger aircraft with minimal impact on marine life.