An Asian elephant has been born at National Zoo
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With the help of an acoustic camera that visualizes sound pressure, researchers from the University of Vienna investigated the calls of Asian elephants. The elephants emitted their low frequency "rumbles" mainly through their trunk or through their mouth ...
Nature’s most impressive conversations happen at frequencies we cannot hear. While humans perceive sounds between 20 and 20,000 hertz, many animals have evolved to communicate using infrasound. These acoustic waves, below 20 Hz, can travel extraordinary distances through air, water, and even solid ground.