Ib puag ncig uas muaj ntau yam khoom siv hluav taws xob / hluav taws xob ua haujlwm tib lub sijhawm yuav tsim teeb meem vim yog kev cuam tshuam ntawm lub suab nrov hluav taws xob lossis vim muaj kev cuam tshuam hluav taws xob (EMI). Lub suab nrov hluav taws xob tuaj yeem cuam tshuam loj heev rau kev ua haujlwm ntawm txhua yam khoom siv.