Cov ntaub no yog tuab thiab tawv, tsis muaj elasticity.Antique xov tooj cua thiab hais lus feem ntau muaj zoo li mesh npog.Puas yog lawv ua tau raws li qhov yuav tsum tau ua rau cov xov tooj cua qub lossis cov xov tooj cua qub thiab lwm yam mesh npog zoo sib xws.Ib tug niaj hnub style hais lus tsis haum.Cov khoom no yog ib qho tshwj xeeb mesh npog rau cov neeg hais lus, tag nrho xav txog qhov tsim acoustic, thiab yuav tsis muaj kev cuam tshuam ntawm lub suab nrov lossis qis.