Ososayensi abavela eSandia National Laboratories baqala umkhankaso webhaluni elisebenza ngelanga elathwala umbhobho liye endaweni yomkhathi woMhlaba ebizwa ngokuthi i-stratosphere.
Lo mkhankaso ubuhlose ukutadisha imvelo ye-acoustic kulesi sifunda. Nokho, abakuthola kwabashiya bedidekile ososayensi. Baqopha imisindo ephezulu emkhathini woMhlaba engakwazi ukukhonjwa.
The imisindo eyinqaba ishiye ochwepheshe bedidekile futhi kusukela manje, ayikho incazelo yale misindo engaqondakali. Ngenxa yokuthi le ndawo ivame ukuzola futhi ayinazo iziphepho, isiyaluyalu, nokuhamba kwezindiza zezentengiselwano, imibhobho ekulolu ungqimba lomkhathi ingalalela kokubili imisindo yemvelo neyomuntu.
Kodwa-ke, umbhobho ocwaningweni uthole imisindo eyinqaba ephindaphinda izikhathi ezimbalwa ngehora. Imvelaphi yabo ayikahlonzwa.
Imisindo irekhodwe kububanzi be-infrasound, okusho ukuthi ibikumafrikhwensi angu-20 hertz (Hz) nangaphansi, ngaphansi kakhulu kobubanzi bendlebe yomuntu. "Kunezibonakaliso ezingaqondakali ze-infrasound ezenzeka izikhathi ezimbalwa ngehora kwezinye izindiza, kodwa umthombo walezi zinto akaziwa nhlobo," kusho uDaniel Bowman weSandia National Laboratories esitatimendeni.
U-Bowman nozakwabo basebenzisa ama-micro barometers, asungulwe ekuqaleni ukuze aqaphe izintaba-mlilo futhi akwazi ukuthola imisindo ephansi, ukuqoqa idatha ye-acoustic ku-stratosphere. Ama-micro barometer athole amasiginali e-infrared aphindaphindiwe angachazwanga ngaphezu kwemisindo elindelekile yemvelo neyenziwe umuntu.
Izinzwa ziphakanyiswe phezulu ngamabhaluni enziwe u-Bowman nozakwabo. Amabhaluni, ayenobubanzi obusukela kumafidi angu-20 kuya kwangu-23 (amamitha angu-6 kuya kwangu-7), enziwe ngezinto ezivamile nezingabizi. Lawa magajethi alula ngendlela ekhohlisayo, anikwa amandla ukukhanya kwelanga, akwazi ukufinyelela ukuphakama okungamamitha angu-70,000 (amamayela angu-13.3) ngaphezu koMhlaba.
“Amabhaluni ethu ayizikhwama zepulasitiki ezinkulu ezinothuli lwamalahle ngaphakathi ukuze abe mnyama,” kusho uBowman. “Sizakha sisebenzisa ipulasitiki yomdwebi ephuma esitolo sehardware, i-shipping tape, kanye nempuphu yamalahle ezitolo ze-pyrotechnic. Lapho ilanga likhanya kumabhaluni amnyama, umoya ongaphakathi uyashisa futhi ugcwale.”
U-Bowman wachaza ukuthi amandla elanga angenzi lutho anele ukusunduza amabhaluni ukusuka ebusweni beplanethi kuya ku-stratosphere. Amabhaluni aqashwa kusetshenziswa i-GPS ngemva kokwethulwa, into okwakumelwe ithimba liyenze ngoba amabhaluni ngokuvamile angandizela phezulu amakhulu amakhilomitha futhi ahlale ezindaweni okunzima ukuzihamba emhlabeni.
Ngaphezu kwalokho, njengoba izigameko zakamuva zibonisile, amabhaluni ocwaningo angadida ezinye izinto, adale ukukhathazeka ngephutha. Amabhaluni anamandla elanga afana naleli angasetshenziswa ukufunda izimfihlakalo ngisho nangaphezulu ukusuka eMhlabeni, ngaphezu kokusiza ukuqhubekisa ukuphenya le misindo eyinqaba ye-stratospheric.
Izimoto ezinjalo okwamanje ziyahlolwa ukuze kutholwe ukuthi zingabambisana yini ne-Venus orbiter ukuze kubonwe ukuzamazama komhlaba kanye nokusebenza kwentaba-mlilo emkhathini wayo owugqinsi. Amabhaluni amarobhothi angakhukhuleka emkhathini ongaphezulu “wewele elibi Lomhlaba,” phezulu ngaphezu kwendawo yawo eshisa ngendlela eyisihosha futhi enomfutho ophakeme ephenya umkhathi wawo owugqinsi namafu e-sulfuric acid.
Ucwaningo lwethimba oluqukethe ukutholwa kwale mithombo ye-infrasound engakhonjiwe lwethulwa ngu-Bowman ngoMeyi 11, 2023, e- Umhlangano we-184 we-Acoustic Society yaseMelika ebanjelwe eChicago.
