Izingidi ze-pushrod yomnyango womlilo zingavimbela abantu bangaphandle ukuthi bangene ngaphakathi ngaphandle kwemvume, kuyilapho bevumela abantu abangaphakathi ukuba baphume esimweni esiphuthumayo, ngomsindo we-alamu we-decibel ephezulu uma isetshenziswa ngaphandle kwemvume. Ilokhi yokuphusha induku yomnyango womlilo nayo inomsebenzi wokuphunyuka komlilo ukuze uvuleke ngokushesha futhi uphume ezimweni eziphuthumayo, futhi ibona ukuphathwa okudidiyelwe kokuphepha komnyango wokuphunyuka komlilo kanye nomlilo.

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