Kwisandi se-atmospheri kunye nongcoliseko lwengxolo, inqanaba lengxolo ye-ambient (maxa wambi ebizwa ingxolo yangasemva inqanaba, inqanaba lesandi sereferensi, okanye umgangatho wengxolo wegumbi) ngumgangatho ongemva woxinzelelo lwesandi kwindawo ethile, edla ngokuchazwa njengenqanaba lereferensi yokufunda umthombo omtsha wesandi esingenelelayo.
Amanqanaba esandi se-Ambient akholisa ukulinganiswa ukuze kuboniswe iimeko zesandi kulawulo lwesithuba ukuze kuqondwe ukuguquguquka kwazo ngokwendawo.
Kule meko imveliso yophando yimephu yecontour yenqanaba lesandi. Kungenjalo amanqanaba engxolo ambient inokulinganiswa ukunika indawo yereferensi yokuhlalutya isandi esingenelelayo kwindawo enikiweyo.
Umzekelo, ngamanye amaxesha ingxolo yenqwelomoya iphononongwa ngokulinganisa isandi se-ambient ngaphandle kobukho bako nakuphi na ukubhabha ngaphezulu, kuze kufundwe ukongezwa kwengxolo ngomlinganiselo okanye ukulinganisa ngekhompyutha kweziganeko zokubhabha ngaphezulu.
Okanye ingxolo yendlela ilinganiswa njengesandi se-ambient, ngaphambi kokwazisa umqobo wengxolo ocingelwayo ojolise ekunciphiseni inqanaba lengxolo yendawo. Inqanaba lengxolo yendawo engqongileyo lilinganiswa ngemitha yomgangatho wesandi.
Ngokuqhelekileyo kulinganiswa kwi-dB ngaphezu kwenqanaba loxinzelelo lwereferensi ye-0.00002 Pa, oko kukuthi, i-20 μPa (i-micropascals) kwiiyunithi ze-SI. I-pascal yi-newton ngemitha yesikwere.
Inkqubo yeeyunithi zeesentimitha-gram-yesibini, inqanaba lereferensi yokulinganisa inqanaba lengxolo ye-ambient yi-0.0002 dyn/cm2.
Awona manqanaba engxolo ahlala aqhelekile alinganiswa kusetyenziswa isihluzo sokulinganisa amaza, esona sixhaphakileyo sisikali sobunzima esingu-A, esibangela ukuba imilinganiselo ibe yi-denoted dB(A), okanye iidecibels kwisikali sika-A.
NdinguJoost Nusselder, umseki weNeaera kunye nomthengisi womxholo, utata, kwaye ndiyakuthanda ukuzama izixhobo ezitsha ngesiginkci entliziyweni yothando lwam, kunye neqela lam, ndisenza amanqaku eblogi anzulu ukusukela ngo-2020. ukunceda abafundi abathembekileyo ngokurekhoda kunye neengcebiso zesiginci.
