noun
decibel; dB
Unit for measuring sound intensity or power level; used in acoustics, electronics, and everyday contexts.
このヘッドホンの最大音量は100デシベルです。
The maximum volume of these headphones is 100 decibels.
騒音計でデシベルを測った。
I measured the decibels with a sound level meter.
Loanword from English 'decibel', itself derived from 'deci-' (one-tenth) and 'bel' (named after Alexander Graham Bell).