tóng-àn:Sounds-of-Mars -Helicopter Flying on Mars.ogg
Sounds-of-Mars_-Helicopter_Flying_on_Mars.ogg （Ogg FLAC聲音檔案，長度2分30秒，135 kbps，檔案大小：2.42 MB）
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Khài-iàu
| Soat-bêng |
English: For the first time, a spacecraft on another planet has recorded the sounds of a separate spacecraft. NASA’s Perseverance Mars rover used its SuperCam microphone to listen to the Ingenuity helicopter on April 30, 2021 as it flew on Mars for the fourth time.
With Perseverance parked 262 feet (80 meters) from the helicopter’s takeoff and landing spot, the mission wasn’t sure if the microphone would pick up any sound of the flight. Even during flight when the helicopter’s blades are spinning at 2,537 rpm, the sound is greatly muffled by the thin Martian atmosphere. It is further obscured by Martian wind gusts during the initial moments of the flight. Listen closely, though, and the helicopter’s hum can be heard faintly above the sound of those winds. Scientists made the audio, which is recorded in mono, easier to hear by isolating the 84 hertz helicopter blade sound, reducing the frequencies below 80 hertz and above 90 hertz, and increasing the volume of the remaining signal. Some frequencies were clipped to bring out the helicopter’s hum.Català: Per primera vegada, una sonda espacial d’un altre planeta ha enregistrat els sons d’una altra sonda espacial. El ròver Perseverance de la NASA va utilitzar el seu micròfon SuperCam per escoltar l’helicòpter Ingenuity el 30 d’abril de 2021 mentre volava per quarta vegada sobre la superfície marciana.
Amb Perseverance aparcada a 80 metres de l’enlairament i l’aterratge de l’helicòpter, la missió no estava segura si el micròfon captaria cap so del vol. Fins i tot durant el vol, quan les pales de l’helicòpter giren a 2.537 rpm, el so queda molt apagat per la fina atmosfera marciana. A més, queda enfosquit per les ratxes de vent marcianes durant els primers moments del vol. Escolteu atentament, però, i el brunzit de l’helicòpter es pot escoltar lleugerament per sobre del so d’aquests vents. Els científics van fer que l’àudio, que es gravà en mono, sigui més fàcil d’escoltar aïllant el so de la fulla de l’helicòpter de 84 Hz, reduint les freqüències per sota dels 80 Hz i per sobre dels 90 Hz i augmentant el volum del senyal restant. Es van retallar algunes freqüències per fer ressonar el brunzit de l’helicòpter. |
| Ji̍t-kî | |
| Chhut-chhù | https://mars.nasa.gov/resources/25893/listen-to-nasas-ingenuity-mars-helicopter-in-flight/ |
| Chok-chiá | NASA/JPL-Caltech/LANL/CNES/CNRS/ISAE-Supaéro |
Siū-khoân
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本作品由NASA創作，屬於公有領域。根據NASA的版權政策：“NASA的創作除非另有聲明否則不受版權保護。”（參見：Template:PD-USGov/zh，NASA版權政策或JPL圖像使用政策） |  |
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| Ji̍t-kî/Sî-kan | Sáuk-liŏk-dù | Chióh-cháung | Iōng-chiá | Chù-kái | |
|---|---|---|---|---|---|
| hiān-chāi | 2021-nî 5-goe̍h 12-ji̍t (pài-saⁿ) 16:48 | 2分30秒（2.42 MB） | Yarnalgo | Re-converted from original wav source to lossless flac format to preserve original quality | |
| 2021-nî 5-goe̍h 8-ji̍t (pài-la̍k) 12:47 | 2分30秒（883 KB） | Chinakpradhan | Uploaded a work by NASA/JPL from https://mars.nasa.gov/mars2020/participate/sounds/?playlist=mars&item=mars-helicopter-flying&type=mars https://mars.nasa.gov/resources/25892/listen-to-nasas-ingenuity-mars-helicopter-in-flight/ with UploadWizard |
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