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SEIS has no trouble identifying quiet quakes, but its sensitive ear means scientists have lots of other noises to filter out. Over time, the team has learned to recognize the different sounds. And while some are trickier than others to spot, they all have made InSight's presence on Mars feel more real to those working with the spacecraft.
Charalambous and Nobuaki Fuji of Institut de Physique du Globe de Parisprovided the audio samples for this story, including the one below, which is also best heard with headphones and captures the array of sounds they're hearing. On March 6, , a camera on InSight's robotic arm was scanning the surface in front of the lander.
Each movement of the arm produces what to SEIS is a piercing noise. Wind gusts can also create noise. The team is always on the hunt for quakes, but they've found the twilight hours are one of the best times to do so. During the day, sunlight warms the air and creates more wind interference than at night. Evening is also when peculiar sounds that the InSight team has nicknamed "dinks and donks" become more prevalent.
The team knows they're coming from delicate parts within the seismometer expanding and contracting against one another and thinks heat loss may be the factor, similar to how a car engine "ticks" after it's turned off and begins cooling. You can hear a number of these dinks and donks in this next set of sounds, recorded just after sundown on July 16, Sol Listen carefully and you can also pick out an eerie whistling that the team thinks may be caused by interference in the seismometer's electronics.
What does it sound like to you? A hall full of grandfather clocks? A Martian jazz ensemble? Share your thoughts with us on Twitter. Lockheed Martin Space in Denver built the InSight spacecraft, including its cruise stage and lander, and supports spacecraft operations for the mission. The User of this demo undertakes to use the demo in accordance with customs and standard practices.
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