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April 3, 2022 05:35 pm
Original Link: https://science.slashdot.org/story/22/04/03/1713231/sound-travels-much-slower-on-mars-researchers-find?utm_source=rss1.0mainlinkanon&utm_medium=feed
Sound Travels Much Slower on Mars, Researchers Find
"For 50 years, interplanetary probes have returned thousands of striking images of the surface of Mars, but never a single sound." So says the largest fundamental science agency in Europe, the French National Centre for Scientific Research (France's state research organisation). Then they made a surprising discovery, reports CBS News:Researchers studying recordings made by microphones on NASA's Perseverance rover found that sound travels much slower on Mars than it does on Earth... In addition, the researchers realized that there are two speeds of sound on Mars — one for high-pitched sounds and one for low-pitched sounds. This would "make it difficult for two people standing only five meters apart to have a conversation," according to a press release on the findings. The unique sound environment is due to the incredibly low atmospheric surface pressure. Mars' pressure is 170 times lower than Earth's pressure. For example, if a high-pitched sound travels 213 feet on Earth, it will travel just 26 feet on Mars. While sounds on Mars can be heard by human ears, they are incredibly soft. "At some point, we thought the microphone was broken, it was so quiet," said Sylvestre Maurice, an astrophysicist at the University of Toulouse in France and lead author of the study, according to NASA. Besides the wind, "natural sound sources are rare," the press release said. But NASA scientists think Mars may become more noisy in the autumn months, when there is higher atmospheric pressure. "We are entering a high-pressure season," co-author of the study Baptiste Chide said in the press release. "Maybe the acoustic environment on Mars will be less quiet than it was when we landed."Read more of this story at Slashdot.
Original Link: https://science.slashdot.org/story/22/04/03/1713231/sound-travels-much-slower-on-mars-researchers-find?utm_source=rss1.0mainlinkanon&utm_medium=feed
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