A team including researchers from Osaka University looked to nature for inspiration in designing more effective wireless sensor networks. First, they recorded the vocal interplay of neighboring tree frog calls, which they found allowed tradeoff time for individual communication, though this is interspersed with more random collective silence and choruses. They mathematically modeled these patterns and effectively applied their model toward the control of a wireless sensor network.
Researchers have tested the sounds made by six different acoustic guitars in a study addressing the effects of the type of wood used in their construction. Some of the woods used for guitar backs are revered by guitar players for their acoustic qualities, and are claimed to be tonally superior to other woods. Unfortunately many of these woods are expensive, rare, and from unsustainable sources.
Researchers at the Advanced Science Research Center (ASRC) at The Graduate Center of The City University of New York and at the City College of New York (CCNY) have developed a metamaterial that can transport sound in unusually robust ways along its edges and localize it at its corners.
Light and high-frequency acoustic sound waves in a tiny glass structure can strongly couple to one another and perform a dance in step.
MIT engineers have devised a technique that vastly improves on the speed and accuracy of measuring soft materials' properties. The technique can be used to test the properties of drying cement, clotting blood, or any other 'mutating' soft materials as they change over time. The researchers report their results in the journal Physical Review X.
Blue whales have been dropping pitch incrementally over several decades, but the cause has remained a mystery. A new study finds a seasonal variation in the whales' pitch correlated with breaking sea ice in the southern Indian Ocean. The new research also extends the mysterious long-term falling pitch to related baleen whales and rules out noise pollution as the cause of the global long-term trend, according to the study's authors.
A new study reveals the negative effects of traffic noise on frogs and how some frogs have adapted. Traffic noise is stressful to frogs and impairs the production of skin peptides that defend against pathogens like chytrid fungus. Frogs from ponds near noisy highways show a dampened stress response and altered immune profile when exposed to noise compared to frogs from quiet ponds, suggesting they have adapted to reduce the negative effects of traffic noise.
Academics transform photo of landmark Mars sunrise into a piece of music
Beatboxing is a musical art form in which performers use their vocal tract to create percussive sounds, and a team of researchers is using real-time MRI to study the production of beatboxing sounds. Timothy Greer will describe their work showing how real-time MRI can characterize different beatboxing styles and how video signal processing can demystify the mechanics of artistic style. Greer will present the study at the Acoustical Society of America's 176th Meeting, Nov. 5-9.
Few things can delight an adult more easily than the uninhibited, effervescent laughter of a baby. Yet baby laughter, a new study shows, differs from adult laughter in a key way: Babies laugh as they both exhale and inhale, in a manner that is remarkably similar to nonhuman primates. The research will be described by Disa Sauter during a talk at the Acoustical Society of America's 176th Meeting, Nov. 5-9.