Tsis muaj tus qauv ruaj khov rau qhov siab ntawm kev sib txuas lus yees; nws yog hloov kho raws li qhov tseeb daim ntawv thov scenario, kev pab them nqi, thiab ntauwd qauv yam ntxwv. Feem ntau, qhov siab ntawm kev sib txuas lus ntauwd yog li ntawm 10 meters mus rau 150 meters, tab sis tuaj yeem tshaj qhov no vim qhov kev xav tau tshwj xeeb.
In core urban areas, due to the dense concentration of tall buildings, signal obstruction is easily achieved. Yog li ntawd, qhov siab ntawm kev sib txuas lus ntauwd yog feem ntau ntawm 10 thiab 30 meters. Cov pej thuam no feem ntau tshwm sim ua lub tsev- txuas txuas ntxiv lossis cov tsev tsis muaj kev ywj pheej tsawg, txhawm rau txhawm rau npog lub vojvoog ntawm 1-2 mais thaum zam kev pom kev tsis sib haum xeeb nrog cov tsev nyob ib puag ncig.
Nyob rau hauv suburban thiab nyob deb nroog, qhov twg lub tsev ceev yog tsawg, qhov siab ntawm kev sib txuas lus yees yog feem ntau ntawm 30 thiab 60 meters. Qhov siab no ua tau zoo nthuav dav lub vojvoog (feem ntau ncav cuag 2-5 mais) thaum ntsuas qhov ua tau zoo thiab cov nqi tsim kho.
Rau cov cheeb tsam nyob deb nroog thiab roob roob, vim muaj cov neeg siv khoom sib faib thiab thaj chaw nyuaj, qhov siab ntawm kev sib txuas lus yog feem ntau ntawm 60 thiab 120 meters, lossis ntau dua. Cov pej thuam siab no tuaj yeem kov yeej cov kev thaiv hauv av xws li ntoo thiab toj, npog thaj tsam dav dua, feem ntau 5-10 mais, yog li txo cov chaw nres tsheb hauv paus.
Tsis tas li ntawd, nyob rau hauv cov xwm txheej tshwj xeeb, xws li cov tiaj tiaj lossis cov suab puam, kev sib txuas lus ntauwd tuaj yeem ncav cuag qhov siab ntawm 120 txog 150 meters kom ua kom tau txais kev pab ntau tshaj. Hauv thaj chaw scenic lossis cov cheeb tsam keeb kwm, kom muaj kev sib haum xeeb nrog cov toj roob hauv pes, kev sib koom ua ke ntawm cov ntoo lossis cov teeb pom kev zoo feem ntau khaws cia ntawm qhov siab ntawm 10 txog 20 meters.
Kev xaiv ntawm kev sib txuas lus ntauwd qhov siab yog txheej txheem dav, xav txog yam xws li cov teeb liab yuav tsum muaj, cov kev txwv ib puag ncig, thiab cov yam ntxwv ntauwd. Hauv kev siv tswv yim, kev hloov pauv hloov pauv yog tsim nyog raws li cov xwm txheej tshwj xeeb kom ua tiav qhov kev pom zoo thiab cov txiaj ntsig kev lag luam.
