NASA’s Perseverance Rover first captured the low-key whistling sound as the blades of the Ingenuity helicopter flew through the scarce Martian atmosphere.

On Friday, the space agency released a new footage taken by a six-wheeled robot that is a companion of the rotorcraft, which took place on April 30th for the fourth flight-this time with a soundtrack.

The three-minute video begins with low winds blowing through Jezero Crater, where the Perseverance landed in February, and its mission was to find traces of ancient microorganisms.

Ingenious workmanship, in a round trip of 872 feet (262 meters), when the blades rotate at a speed of nearly 2,400 rpm, its blades will make a buzzing sound.

Given that the Perseverance aircraft was parked 262 feet (80 meters) from the take-off and landing sites, the mission engineers were not sure whether they would hear the sound of the flight.

The Martian atmosphere is about one percent of the density of our planet, which makes everything much quieter than the Earth.

David Mimoun, professor of planetary science at the Institute of Aeronautics, Astronautics and Astronautics (ISAE-SUPAERO) in Toulouse, France, said, “This is a really good surprise.

He added: “The tests and simulations we conducted tell us that because the Martian atmosphere greatly suppresses the propagation of sound, the microphone hardly picks up the sound of the helicopter.”

The SuperCam is a tough instrument on board that can break rocks with a laser at a distance, so that a device called a spectrometer can be used to study its vapor, which can reveal its chemical composition.

It is also equipped with a microphone to record sound, thereby generating more insights into the physical characteristics of the target (such as the strength of the target).

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Mimoun explained that similarly, the new record of Ingenuity’s flight “will be a gold mine for our understanding of the Martian atmosphere.”

In addition to the lower volume, due to the low temperature of -81 degrees Fahrenheit (-63 degrees Celsius) on the surface, the sound from Mars travels slower than the sound on Earth.

Therefore, the speed of sound on the planet is about 540 mph (about 240 meters per second), and here is about 760 mph (about 340 meters per second).

The Martian atmosphere, composed of 96% carbon dioxide, tends to absorb higher-pitched sounds, so only lower-pitched sounds can travel long distances.

Audio enhancement

NASA enhances the audio recorded in mono by isolating the pitch of the helicopter blades at 84 Hz and reducing audio frequencies below 80 Hz and above 90 Hz. Then, they increased the volume of the remaining signal.

Soren Madsen, Perseverance Payload Development Manager at NASA’s Jet Propulsion Laboratory, said the record is an example of how the mission’s instruments can work together to improve our understanding of the Red Planet.

As the ingenuity moves away from perseverance, the pace will decrease, and the pace will increase when returning.

This is the so-called Doppler effect. When the helicopter exceeds the visual range, it can provide an extra layer of confirmation for the helicopter’s flight path.

Ingenuity made its first power-controlled flight on another planet on April 19, and made its fifth flight at 3:26 pm Eastern Time (1926 GMT).

After receiving the telemetry data a few hours later, NASA comfirmed The success of this flight posted a new photo of the helicopter taken from “Perseverance” on Twitter.

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Friday’s attack was Ingenuity’s first one-way trip, laying the foundation for it to become a Perseverance scout and start a new job.

In the next phase, the mission of the marine engine will be expanded beyond the initial one-month technical demonstration. Now, the goal is to evaluate how pilots can better help future exploration of Mars and other worlds.

The four-pound (1.8 kg) small shredder was granted this task after proving that it was stronger than its engineers expected.

Perseverance’s scientific team also decided that they wanted to stay in the surrounding environment longer than they initially thought, which allowed the two robots to work together.

By figuring out the best path for the explorer to traverse and reach an otherwise impossible location, the creative type of reconnaissance may one day prove to be useful for human tasks.


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