deci·bel 
/ˈdɛsəˌbɛl/ noun
plural deci·bels /ˈdɛsəˌbɛl/ noun [count] technical : a unit for measuring how loud a sound is
▪ a rock concert blasting music at 110 decibels ▪ suffered hearing loss from repeated exposure to high decibels [=to loud sounds] — abbr. dB
▪ a rock concert blasting music at 110 decibels ▪ suffered hearing loss from repeated exposure to high decibels [=to loud sounds] — abbr. dB
