For the first time, The Rover Has detected sounds from Mars


An analysis of acoustic measurements on Mars has revealed the speed of two sounds in a carbon-dioxide atmosphere, according to a planetary science study reported in nature.The sounds were picked up by NASA’s Mars Rover, Perseverance.These results suggest that the measurement of sound could help study planetary atmospheres and improve the possibility of understanding the acoustic environments of other planets.The acoustic record of the planet may give us an idea of where the sound comes from and the atmosphere in which it travels.Past Missions to Mars have tried unsuccessfully to record sounds.The Mars Polar Lander lost its microphone when it entered the Martian atmosphere, and the Phoenix Spacecraft also experienced technical difficulties with its microphone.The French astrophysics research center, university of Toulouse, France’s national centre for scientific research, the French scientist at the national center for space research report, “perseverance” first provides the Mars lander’s microphone acoustic environment within the scope of the audible range and to hear (from 20 hz to 50 KHZ frequency).Four hours and 40 minutes of Martian sounds were analyzed, including turbulence in the air caused by wind, sparks from the probe’s laser splitting of rocks to study the planet’s chemical signature, and other noises from the probe’s machinery.Perseverance’s microphone detects changes in wind speed based on changes in sound intensity.These measurements revealed pressure fluctuations at frequencies greater than 20 Hertz, which have never been obtained on Mars before.The speed of sound at different frequencies can be measured by direct analysis of the sounds produced by the laser and tact, a small robotic helicopter.The high-frequency sound waves generated by the laser pulses (frequencies above 2 kilohertz) travel at speeds between 246 and 257 meters per second, while the lower frequencies generated by Tact’s blades (around 84 Hertz) are estimated at 240 meters per second.These measurements are consistent with velocities predicted based on knowledge of Martian pressure and the acoustic decay properties of carbon dioxide.Further measurements of wind speeds at different times and seasons could shed more light on changes in the Martian atmosphere, the team concluded, and the lander’s recorded sounds could be used to check the rover’s systems.(Reporter Zhang Mengran)

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