Qhia txog hais lus
Ib tus hais lus yog qhov hloov khoom siv uas hloov lub teeb liab hluav taws xob rau hauv cov suab hais ua suab nrov. Qhov ua tau zoo ntawm tus hais lus tau muaj kev cuam tshuam zoo rau lub suab zoo. Tus hais lus yog ib qho ntawm cov tsis muaj zog tshaj plaws hauv cov khoom siv suab, thiab nws yog ib qho tseem ceeb tshaj plaws rau suab nrov. Muaj ntau hom lus sib txawv, thiab tus nqi sib txawv heev. Cov suab hluav taws xob kis tau los ntawm hluav taws xob, piezoelectric lossis electrostatic cuam tshuam, ua rau lub khob hliav qab los yog lub suab nrov ua kom nrov thiab ua kom zoo (resonate) nrog cov huab cua nyob ib puag ncig los tsim suab.