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The Voice of Mars: After 50 years of Interplanetary Exploration

Swapnil recently read an article on sound recordings from Mars. He read it and tried to convert it his own words and his own understanding.

Perseverance is one of the robotic vehicle or simply rover, sent to Mars. A car-sized Mars rover designed to explore Mars as part of NASA's Mars 2020 mission.

Perseverance is one of the robotic vehicle or simply rover, sent to Mars. A car-sized Mars rover designed to explore Mars as part of NASA's Mars 2020 mission.

According to the study of Perseverance rover

NASA's one of the five rover, called Perseverance, captured Sounds from Mars. The study made by observing the recordings conclude that the speed of sound on Mars is slower than on Earth. Since February 2021, it is for the first time the rover have recorded phonic environment of Mars. Scientists from the C.N.R.S and I.S.A.E.-S.U.P.A.E.R.O, organised a data of these sounds, which was collected using the Super.Cam instrument built in France under the authority of the French space agency C.N.E.S.

Ingenuity Mars Helicopter

Ingenuity Mars Helicopter

For 50 years of interplanetary exploration, thousands of images of the Martian surface have returned, but never a single sound or audio clip. Today NASA's Perseverance mission has put an end to this ear-piercing silence of the planet by recording the first ever Martian sounds. Listen to the sounds from Mars, recorded by NASA’s Perseverance: the rover’s mechanical whine and click in a light Martian wind; the whir of rotors on Ingenuity, the Mars helicopter; the crackling strike of a rock-zapping laser. A team of scientists for the French-US Super.Cam instrument installed on Perseverance was told that the study of the soundscape of Mars could advance our understanding of the planet. This scientific provocation led them to design a microphone dedicated to the exploration of Mars, at I.S.A.E-S.U.P.A.E.R.O in Toulouse, France.

The Super.Cam microphone, highlighted in blue, at the top of the rover’s mast.

The Super.Cam microphone, highlighted in blue, at the top of the rover’s mast.

Perseverance recorded the first sound from Martian surface on February 19, 2021, just the day after its arrival in the Martian Atmosphere. These sounds were between the human audible spectrum, that is 20 Hz and 20 kHz. The Mars is so noiseless and peaceful that so many times the scientists thought that the E.D.L microphone is no longer working. In addition to this observation, the scientists focused on the sounds generated by the rover itself, including the shock waves produced by the impact of the Super.Cam laser on rocks, and flights taken by the Ingenuity helicopter. By studying the distribution of these sounds from Mars, whose nature is very well understood on Earth, they were able to accurately distinguish the phonic properties of the Martian atmosphere.

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The E.D.L microphone, highlighted in blue, attached to the left side of the rover.

The E.D.L microphone, highlighted in blue, attached to the left side of the rover.

Outcomes of Mars 2020 Perseverance Rover Mission

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