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How Can We Detect Tornadoes Earlier?
"Welcome to brainstorm a production of iheartradio. Pay Rain Staff. Lauren. Volvo bomb here. In the same way that ultraviolet light and infrared light exists outside the human eye can perceive sound waves exist beyond the frequencies of what humans can hear when those sound waves are higher frequency than what we can here we call them ultrasonic and when they're lower frequency, we call them infrasonic. Several natural sources, including volcanoes, avalanches, quakes, and meteors produce infrasonic waves also called in for sound. Animals like elephants in Wales may communicate with infra sound and man made inventions like wind turbines can generate these sounds to. A detecting infrasonic waves is one of the key ways governments can monitor for nuclear bomb tests. That's because infrasonic waves decay very slowly, and when they're large enough, they can wrap around the globe several times before dissipating. And it turns out the tornadoes can produce unique infrasonic waves even before tornado genesis, which is when the storm forms an hour or more before. Scientists have known about the tornado in for sound connection for several decades but to learn more about this process and to better understand how humans harness this information, a group of scientists is developing a long distance passive way of listening in on tornadoes in doing. So we'd be able to deal with the fact that three fourths of all current tornado warnings are Lawrence and thus too often ignored or not taken seriously. In for sound could represent another source of data to add to our arsenal. One Brian, Bang and Oklahoma state. University mechanical and Aerospace Engineering Professor said in a press release discussing this research by monitoring tornadoes from hundreds of miles away we'll be able to decrease false alarm rates and possibly even increase warning times. elbing and his team built special listening devices using microphones sensitive to low frequencies that were then placed inside of containers with noise holes and arranged in triangle for precision measurements. The goal was to separate regular wind noise from Tornado noise? elbing said wind noise is incoherent. So if you average it over a large space, it will sum up to zero. Conversely, Tornado infra sound is coherent meaning waves look over large distances. So the pressure waves ad together and contain information. This new capability could mean that storm chasers trying to gather data about tornadoes would be able to take fewer risks in their research. Imagine drones equipped with special infrasonic microphones, for instance, flying in the vicinity of storms, transmitting data to forecasters and scientists. It could therefore help save lives by giving people earlier warnings about potentially deadly storms in the United