Raws li cov neeg siv hluav taws xob lub elveym condenser microphone tov kev daws teeb meem los txhim kho qhov peev txheej ntawm cov qhua tuaj noj mov ntawm cov kab ntau lawm.
Piv nrog rau cov chav ntsuas hluav taws xob ruaj khov, cov kab ke no muaj cov khoom lag luam me, uas daws cov teeb meem xeem thiab coj kev lag luam zoo dua. Nws kuj tuaj yeem txo tus nqi ntawm cov khoom tuav.