decibel decibela relative unit used to describe sound intensities. Written as dB. See Advanced Topic: Introduction to Decibels. Related Articles: Glossary: source levelGlossary: phonGlossary: sound exposure level (SEL)Glossary: sound levelGlossary: underwater dBUnderwater Acoustic Impacts of COVID-19 – June 3, 2020Glossary: critical ratioAmplitude and IntensitySonar Equation Example: Active SonarDOSITS Videos Derek Sutcliffe2022-11-03T09:10:10-05:00