Decibel Converter

Formula and source

Power dB = 10*log10(P2/P1); voltage/pressure dB = 20*log10(V2/V1); dBu ref 0.775 V, dBV ref 1 V, dBSPL ref 20 uPa; incoherent sum L = 10*log10(sum 10^(Li/10)).

Per the ANSI S1.1 acoustical-terminology decibel definitions (power 10*log, field-quantity 20*log) and the standard reference levels (dBu 0.775 V, dBV 1 V, dBSPL 20 uPa), by name; public.

Audience

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Posture

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