Ma'anar ƙamus na kalmar "decibel" raka'a ce ta aunawa da ke bayyana ƙarfi ko ƙarar sauti. Decibel (dB) raka'a ce ta logarithmic wacce ke kwatanta matakin matsa lamba (SPL) na igiyar sauti da aka bayar zuwa matakin tunani. Ana amfani da shi sosai a cikin acoustics, physics, da injiniyanci don ƙididdige matakan sauti, haka kuma a cikin na'urorin lantarki don auna ƙarfin siginar lantarki.
