Raws li cov kws tshawb fawb los ntawm University of Illinois, lawv tau tsim los tsim cov txheej tshwj xeeb uas yav tom ntej tuaj yeem ua rau lub nkoj submarines pom tsis tau rau sonars thiab lwm yam khoom siv sonar ua haujlwm ntawm ultrasound.
Cov txheej txheej muaj 16 lub ntsej muag sib txuas uas tsim cov kab hluav taws xob muaj peev xwm ntes lub suab nrog zaus ntawm 40 txog 80 kilohertz thiab "ua" nws raws cov kab hluav taws xob, yuam kom nws khoov ib puag ncig ntawm qhov khoom. Nco tseg tias cov tub rog sonars siv rau hauv cov submarines niaj hnub no tsim lub teeb liab nrog zaus ntawm 1 txog 500 kilohertz, tab sis cov kws tshawb fawb ntseeg tias yav tom ntej lawv yuav tuaj yeem hloov kho cov khoom siv.
Thaum lub sijhawm sim, cov kws tshawb fawb tau npog cov khoom ntawm qhov sib txawv thiab cov khoom siv nrog cov khoom tshiab, thiab tom qab ntawd txo lawv mus rau hauv pas dej. Lub tshuab xa hluav taws xob ultrasonic tau tso rau ntawm ib sab ntawm lub pas dej, thiab kaw cov cuab yeej ntawm lwm qhov. Thaum lub sijhawm sim, cov ntsuas ntsuas tsis pom ib yam khoom hauv pas dej.
Cov kws tshawb fawb tseem ntseeg tias txheej txheej tshiab tuaj yeem siv los tiv thaiv lub suab nrov tawm los ntawm kev txav ntawm lub nkoj. Tshwj xeeb, cov khoom siv tshiab yuav pab tua cavitation - tsim cov hollow me me hauv dej thaum ib yam khoom txav ntawm kev kub ceev.
