Qhov nruab nrab ntawm qhov convex array feem ntau yog 3.5MHZ, thiab qhov tob ntawm kev kuaj pom yog sib sib zog nqus, yog li nws tseem hu ua mob plab, uas feem ntau kuaj pom lub siab, raum, thiab qis qis hauv plab
Qhov nruab nrab ntawm qhov tso tawm ntawm kab tawm yog feem ntau siab dua 7MHZ, thiab qhov kev kuaj pom qhov tob yog ntiav, yog li nws tseem hu ua kev sojntsuam ib sab, feem ntau saib cov ntshav ntws ntawm lub mis, hlab ntsha, thiab caj dab.
