science

Mars, this is the noise of the wind in NASA’s first audio recording

NASA has spread The first voice It was recorded on the surface of Mars by the probe’s microphone (which is also the first sound that a human has recorded on the surface of Mars).

Dave Gruel, the man overseeing the photographic and sound equipment for the new robot that has been sent to the Red Planet at NASA, said in a video: “I invite you, if you want, to close your eyes and visualize yourself on Mars, and listen to what is happening around you. “.

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NASA released two votes. At first, you can also hear the roving buzz during operation, similar to what happens with an electric shaver. But the second, in which the noise of perseverance has been eliminated, is amazing: it contains only the winds of Mars.

Mars is known to scientists for the disturbances that can occur on its dusty surface. The true “Devils of Sand”, small tornadoes also photographed in the past by Rovere Opportunity and Spirit, like the ones we sometimes see in the Sahara desert. Stormy climate is one of the variables that must be taken into account, When you decide to send a colony to Mars. The planet is actually experiencing periodic sandstorms that can make life really impossible.

Due to the formation of the atmosphere, which is more thin on the surface of Mars, sounds are heard in another way With respect to the ground. If we were on Mars, and we tried to speak, we would hear a much more muffled sound than what we do on our planet. There are also frequencies that, NASA knows, that are hard to hear at all, like whistles, birds, or bells.

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This is, in fact, of The different composition of the atmosphereBut also because of its density and temperature (minus 63 degrees Celsius). The effects on the sound are different. The speed of sound changes, as it travels from 340 meters per second from the ground to just 240 meters: the difference is difficult to notice closely, but the difference will be apparent from a distance.

Until th the sound It would be much less, in an atmosphere a hundred times less dense than the Earth’s mantle. Even if we could survive without a spacesuit, we would have to get very close to speaking, and ask the interlocutor to raise his voice often.

The chemical composition The atmosphere also has another effect. Carbon dioxide, which predominates in the air of Mars, diffuses sounds in a different way. In practice, only low sounds will travel long distances. Bass singing will have a better chance of collecting applause, in a virtual mars show, rather than soprano.

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Phil Schwartz

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