On February 18, 2021, NASA’s Perseverance rover landed in Jezero Crater carrying the two first microphones operating on the surface of Mars: the SuperCam microphone, positioned on top of the rotating rover’s mast and the EDL microphone fixed on the body of the rover. Working flawlessly since then, they provide the first characterization of Mars’ acoustic environment in the audible range and beyond, from 20 Hz to 50 kHz. Recorded sounds originate from three main sources: the atmosphere (turbulence, wind), the shock-waves generated by the Supercam pulsed laser ablating rocks, and hardware-induced artificial sounds such as the signal generated by the high-speed rotating blades of the Ingenuity helicopter. After one year, the Perseverance playlist features more than 5 hours of martian sounds. In addition to providing an unprecedented short timescale characterization of the wind, temperature fluctuations, and the turbulence dissipative regime, this dataset highlights the unique sound propagation properties of the low-pressure CO2-dominated Mars atmosphere: acoustic impedance varying with the season, large intrinsic attenuation of the high frequencies, and the dispersion of the sound speed in the audible range. This presentation will review these results to date.
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Mars soundscape: Review of the first sounds recorded by the Perseverance microphones
Baptiste Chide, Ralph Lorenz, Naomi Murdoch, Alexander Stott, David Mimoun, Xavier Jacob, Tanguy Bertrand, Nina Lanza, Sylvestre Maurice, Roger Wiens; Mars soundscape: Review of the first sounds recorded by the Perseverance microphones. J. Acoust. Soc. Am. 1 April 2022; 151 (4_Supplement): A184. https://doi.org/10.1121/10.0011042
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