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Vinony

decibel

noun

  1. logarithmic unit expressing the ratio of a physical quantity
L319148 on Wikidata ↗

Wiktionary

Pronunciation: /ˈdɛsɪbɛl/ / /ˈdɛsɪbəl/

noun

Etymology: Etymology tree English deci- English bel English decibel From deci- + bel.

  1. A common measure of intensity ratio (e.g. for sound) that is one tenth of a bel on the logarithmic intensity scale. It is defined as dB = 10 log₁₀(P₁ / P₂), where P₁ and P₂ are the relative intensities.