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‘Mars is very quiet,’ but the Perseverance rover still records the sounds of Mars for science – TechCrunch


Microphone on Mars Rover Perseverance has recorded some interesting noises during its explorations, but for the most part, “deep silence prevailed” on the red planet. You can still hear the “bang, bang” of the rover’s tools, the hum of the Ingenuity helicopters, and the hum of the Martian breeze in the sound collection from this expedition.

we previously heard the sound of Mars indirectly when the researchers repositioned some of the sensors on the InSight Mars Lander, but this is a much more purposeful recording. By comparing the sound of an action or event on Mars with its sound on Earth, you can learn about the atmosphere and other factors that affect it.

“It’s a new sense of investigation that we haven’t used before on Mars,” said astrophysicist Sylvestre Maurice of the University of Toulouse, lead author of one study. published today in the journal Nature. As the summary says:

Prior to the Perseverance rover’s landing, the acoustic environment of Mars was unknown… theoretical models were uncertain because of the lack of experimental data at low pressures and the difficulty of characterizing turbulence or decay. decrease in the closed environment. Here using recordings of Perseverance microphones, we present the first characterization of the acoustic environment of Mars and pressure fluctuations in the audible range and more… Results This result establishes a fundamental truth for the modeling of acoustic processes, which is important for studies in atmospheres such as Mars and Venus.

The findings are essentially sound on Mars moving slowly and rapidly waning or fading away.

The speed of sound at sea level on Earth is about 767 miles per hour. On Mars, it’s measured at 537 MPH, although that will change with the seasons as air pressure rises and falls. And while a medium-sized sound like a voice would reverberate after about 200 feet above Earth, that same sound would travel only 26 feet before becoming inaudible.

It’s good practical knowledge to design systems for work and life on Mars – we now know that it doesn’t make sense to yell at someone, or even maybe alarm sound.

Among the sounds picked up by the pilot’s microphone were the snap of a tunneling laser, the whir of a dust-cleaning fan, and the steady humming of Ingenuity’s propellers as it took off – even though it at a long distance. Listen to the sounds of Mars in the compilation below:



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