Fundamental Constants Place A New Speed Limit On Sound by Emily Conover

Under normal conditions, sound waves can’t go faster than 36 kilometers per second.
Sound zips along at different rates in different materials — moving faster in water than in air for example. But under conditions found naturally on Earth, no material can host sound waves that outpace this ultimate limit, which is about 100 times the typical speed of sound traveling in air.
https://www.sciencenews.org/article/sound-new-speed-limit-physics-fundamental-constants-earth

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