Raws li tau hais dhau los, cov ntawv yas thiab hlau yog cov ntaub ntawv uas tuaj yeem siv tau los siv cov vuam siv ultrasonic. Nrog kev vam meej ntawm kev siv hom vuam no hauv kev sib txuas cov khoom siv tau hais, kev tshawb fawb tau ua kom paub tias nws tseem yuav siv tau los txuas hlau lwm yam khoom siv hom. Yuav tsum muaj txoj hauv kev nrawm nrawm thiab ua kom ntau ntau lwm cov khoom lag luam uas yog vim li cas kev tshawb fawb tau ua kom paub tias ultrasonic vuam tuaj yeem ntsib qhov kev xav tau. Nws tsuas yog teeb meem ntawm lub sijhawm ua ntej ib txoj hauv kev los khi rau lwm cov ntaub ntawv siv hluav taws xob ultrasonic yog tsim.
