As the Perseverance rover began making tracks on the surface of Mars, the sensitive microphone in its
“Many people, when they see images, do notunderstand that the wheels are metal, explains Wandy Verma, senior engineer and rover driver at NASA's Jet Propulsion Laboratory in Southern California. "When they make their way over the rocks, it's actually very noisy."
Over 16 minutes of sounds from a 27.3 meter drivePerseverance was captured by the EDL Perseverance microphone, which continues to operate on the rover after its historic landing on February 18. A standard microphone was added to the rover to convey as much detail as possible to the rover's operation. However, it is also important for mission engineers to hear sounds from the surface.
“If I heard these sounds while driving mycar, I would stop and call a tug, "said Dave Gruel, lead engineer for the camera and microphone subsystem of the Mars 2020 EDL mission." But if you remember where it's recorded, that sound makes sense. "
Two versions of the audio clip have been released to the public.The first version contains over 16 minutes of raw, unfiltered sounds of a rover traveling through Jezero Crater. It can hear the noise generated by the interaction of the Perseverance moving system (its wheels and suspension) with the surface, as well as a high-pitched scratching sound. The Perseverance engineering team continues to evaluate the source of the scratching noise, which could be either electromagnetic interference from one of the rover's electronic components or an interaction between the mobility system and the surface of Mars. The EDL microphone was not intended for ground operations and underwent limited testing in this configuration prior to launch.
The second version is a shorter compilationsounds from a longer raw disc recording. For this 90-second version, NASA engineers combined three segments from the raw audio file (sections 0: 20-0: 45, 6: 40-7: 10, and 14: 30-15: 00), processing and editing them to filter out some of the noise.
This is the first audio recording of surface movementThe red planet joins a growing playlist of Mars sounds transmitted to Earth from Perseverance. A second microphone, part of the SuperCam instrument, previously picked up gusts of Martian wind and the sound of a laser scanning the surface of Mars to reveal details of their structure and composition. Such information will help scientists who are looking for signs of ancient microscopic life in the Jezero crater, taking samples of rocks and sediments. They will be delivered to Earth in future missions.
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Microphone EDL (entry, descent, and landing) - microphone for recording entry, descent and landing.
Jezero - impact crater on Mars, in the westplains of Isis, near the eastern edge of Greater Sirte. Center coordinates - 18 ° 25 ′ s. sh. 77 ° 41 ′ east 18.41 ° N sh. 77.69 ° E d, diameter - about 49 km. The crater was once filled with water; dry river channels flow into it, one of which forms a pronounced delta.