Asayansi ochokera ku Sandia National Laboratories anayambitsa ntchito ya baluni yoyendera dzuwa yomwe inanyamula maikolofoni kupita kudera lamlengalenga la Dziko lapansi lotchedwa stratosphere.
Cholinga cha ntchitoyi chinali choti aphunzire momwe amamvera mderali. Komabe zimene anapezazo zinawadabwitsa asayansi. Analemba mawu omveka kwambiri mumlengalenga wa Dziko lapansi omwe sangathe kudziwika.
The phokoso lachilendo zasiya akatswiri ali odabwa ndipo kuyambira pano, palibe kufotokozera kwa mawu odabwitsawa. Chifukwa chakuti dera limeneli nthaŵi zambiri limakhala labata komanso lopanda mphepo yamkuntho, chipwirikiti, ndi maulendo apaulendo apandege zamalonda, maikolofoni omwe ali mumlengalengawa amatha kumvetsera maphokoso achilengedwe komanso opangidwa ndi anthu.
Komabe, maikolofoni mu phunziroli adatenga phokoso lachilendo lomwe limabwerezedwa kangapo pa ola. Chiyambi chawo sichinadziwikebe.
Phokosoli linajambulidwa mumtundu wa infrasound, kutanthauza kuti anali pa ma frequency a 20 hertz (Hz) ndi kutsika, pansi kwambiri pamakutu a munthu. "Pali zizindikiro zosamvetsetseka za infrasound zomwe zimachitika kangapo pa ola pa ndege zina, koma gwero la izi silikudziwika," Daniel Bowman wa Sandia National Laboratories adatero m'mawu ake.
Bowman ndi anzake adagwiritsa ntchito ma micro barometers, omwe adapangidwa kuti aziyang'anira kuphulika kwa mapiri ndipo amatha kuzindikira phokoso lochepa kwambiri, kuti atolere mauthenga omveka kuchokera ku stratosphere. Ma barometer ang'onoang'ono adapeza ma siginecha a infrared obwerezabwereza osadziwika kuphatikiza pamawu achilengedwe komanso opangidwa ndi anthu omwe amayembekezeredwa.
Masensawo adakwezedwa m'mwamba ndi mabaluni opangidwa ndi Bowman ndi anzawo. Mabaluni, omwe m’mimba mwake munali mamita 20 mpaka 23 (mamita 6 mpaka 7), anali opangidwa ndi zinthu wamba komanso zotsika mtengo. Zida zosavuta zachinyengo zimenezi, zoyendetsedwa ndi kuwala kwa dzuwa, zinatha kufika pamalo okwera pafupifupi mamita 70,000 (makilomita 13.3) pamwamba pa Dziko Lapansi.
"Mabaluni athu kwenikweni ndi matumba akuluakulu apulasitiki okhala ndi fumbi lamakala mkati kuti apange mdima," adatero Bowman. "Timapanga pogwiritsa ntchito pulasitiki ya zojambulajambula kuchokera ku sitolo ya hardware, tepi yotumizira, ndi makala a ufa kuchokera ku pyrotechnic supply supply. Dzuwa likawalira pamabaluni amdimawo, mpweya umene uli mkatimo umatentha kwambiri.”
Bowman adalongosola kuti mphamvu ya dzuwa ndi yokwanira kukankhira mabuloni kuchokera padziko lapansi kupita ku stratosphere. Mabaluniwo ankawunikidwa pogwiritsa ntchito GPS ikatha kukhazikitsidwa, zomwe gululi linkafunika kuchita chifukwa ma baluni nthawi zambiri amatha kuuluka mtunda wa makilomita mahandiredi ndipo amatera m’madera ovuta kuyenda padziko lonse lapansi.
Kuphatikiza apo, monga momwe zawonetsera posachedwa, ma baluni ofufuza amatha kusokonezedwa pazinthu zina, kubweretsa nkhawa mwangozi. Mabaluni oyendera dzuwa ngati awa atha kugwiritsidwa ntchito kuphunzira zinsinsi zapadziko lapansi, kuwonjezera pakuthandizira kufufuza mozama mawu odabwitsawa.
Magalimoto oterowo akuyesedwa pano kuti adziwe ngati angagwirizane ndi orbiter ya Venus kuti awone zivomezi ndi mapiri ophulika mumlengalenga mwake. Mabaluni a maloboti amatha kuyandama m'mwamba mwa “mapasa oipa a Dziko Lapansi,” pamwamba pa malo ake otentha kwambiri komanso oponderezedwa kwambiri n'kumafufuza mmene zinthu zilili m'mlengalenga komanso mitambo ya sulfuric acid.
Kafukufuku wa gululo womwe uli ndi kupezeka kwa ma infrasound osadziwika adaperekedwa ndi Bowman pa Meyi 11, 2023, ku Msonkhano wa 184 wa Acoustical Society yaku America ikuchitikira ku Chicago.
