Pair · logarithmic

decibels to nepers

dBNp
Active unit

decibels · ≈ 100 dB (base)

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  • dBdecibel100
How we calculated this
Target:
Formula
Np = log((1 × 1.122018^dB) ÷ 1) ÷ log(2.718282)
Calculation
100 dB = 11.512925 Np
Factor
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Related articles

A glowing emerald sound wave curling into a logarithmic spiral, wrapped in a geometric grid, against a cosmic nebula in violet and magenta
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The logarithm of the senses — why two 60 dB speakers aren't 120 dB

Turn on a second identical speaker and the noise level rises by just 3 decibels — from 60 to 63, not to 120. "Zero decibels" doesn't mean silence, and the quietest room in the world sits at −24.9 dB. Here is why the ear hears the world logarithmically, and where physics' most misunderstood unit comes from.

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