Deepa Jain is a freelance science writer from Bengaluru, India. Her educational background consists of a master's degree in biology from the Indian Institute of Science, Bengaluru, and an almost-completed bachelor's degree in archaeology from the University of Leicester, UK. She enjoys writing about astronomy, the natural world and archaeology.
Researchers have teased out the details of how sound behaves at various times and places on Mars — and the results are very different from what we are used to on Earth.
With this in mind, a team of scientists from French and U.S. institutions set out to study the speed of sound and its attenuation — its tendency to die down over distance — within the first 60 feet of Mars' atmosphere. The team calculated sound speed and attenuation at different points of time in the planet's year and in various spots across the Martian landscape, including mountain peaks and valleys. This approach was necessary because the underlying factors vary massively over space and time. In the polar regions, for example, midday temperatures can fluctuate by 108 degrees Fahrenheit , and carbon dioxide levels by 30%, across seasons.
Unlike on Earth, though, sound speed and attenuation depend greatly on carbon dioxide levels. Additionally, while the speed of sound rises abruptly at around 240 hertz, the extent of the shift is less pronounced at lower temperatures than at higher ones.
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