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quien va ganando las elecciones - AzetSar - 2022/05/08
Laura Kloepper is an assistant professor of biology at St. Mary's College in Indiana. At a November 2018, gathering of the Acoustical Society of America, she presented new research that highlights some key differences between bat and dolphin echolocation. And to Kloepper, the choice is clear: She thinks bats use the technique in a way that's far more impressive. But others aren't so sure. There might not be a definitive winner in this aural battle royal. Before you declare yourself for "Team Bat" or "Team Dolphin," here's a breakdown of the matchup. That allows toothed whales to echolocate across much greater distances. Using its sonar, a submerged bottlenose dolphin can identify a potential meal from 361 feet (110 meters) away. Bats have much narrower sonar ranges: Most insect-hunting species can only detect prey items that are within 9.8 to 16.4 feet (3 to 5 meters) of them. Volume is another area where toothed whales blow away the competition. Acoustic levitation allows small objects, like droplets of liquid, to float. Unless you travel into the vacuum of space, sound is all around you every day. But most of the time, you probably don't think of it as a physical presence. You hear sounds; you don't touch them. The only exceptions may be loud nightclubs, cars with window-rattling speakers and ultrasound machines that pulverize kidney stones. But even then, you most likely don't think of what you feel as sound itself, but as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. The process can take place in normal or reduced gravity. In other words, sound can levitate objects on Earth or in gas-filled enclosures in space. signo gato
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