Pronunciation (US) IPA (key): /ˈdɛsɪbɛl/ or /ˈdɛsɪbəl/ Audio (UK)(file) Audio (UK)(file) Noun Singular decibel Plural decibels Decibel is the common unit used to measure the intensity of sound. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads