Cov yam ntxwv tseem ceeb ntawm cov neeg hais lus suav nrog kev hloov hluav taws xob ua ke rau hauv lub suab hluav taws xob, ua lub teeb ci ultra, thiab muaj kev txuag hluav taws xob me me. Tus neeg hais lus yog lub tshuab hluav taws xob electroacousic uas tuaj yeem hloov hluav taws xob hluav taws xob ua lub suab hluav taws xob thiab siv hluav taws xob hauv hluav taws xob thiab cov hluav taws xob emit. Nws tus qauv feem ntau suav nrog peb ntu: mono, dual-channel, thiab lub tso suab, thiab nws txoj haujlwm yog lub suab procagate. Tus qauv tsim ntawm tus hais lus ua rau nws ultra-nyias, teeb, thiab nyob qhov chaw me me, ua rau nws siv nyob rau hauv ntau yam khoom siv hluav taws xob. Tsis tas li ntawd, tus hais lus muaj lub zog siab hloov pauv kev ua tau zoo, dav txoj kev ua haujlwm siab, thiab qis distortion.
Muaj ntau hom neeg hais lus, uas tuaj yeem faib ua hluav taws xob-(txav cov kauj), electrostatic, electromagnetic hom, thiab cov kab ke sib xyaw ua ke raws li lub hauv paus. Cov neeg hais lus hluav taws xob tau siv dav siv vim yog lawv cov kev ua tau zoo electroacoustic, cov qauv muaj zog, thiab tus nqi qis. Raws li cov zaus ntau yam, lawv tuaj yeem faib ua cov tsis tshua muaj zog, nruab nrab-zaus, uas feem ntau siv hauv cov lus raws li kev sib xyaw ua ke.