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Convert neper to decibel

Convert neper (Np) to decibel (dB) instantly. See the formula, a quick table and every other sound level and ratios unit. Free, no ads.

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Neper to decibel

1 Np = 8.6858896 dB. Multiply by 8.6858896. 1 dB = 0.11512925 Np.

neper (Np)	decibel (dB)
1	8.68589
2	17.37178
5	43.42945
10	86.8589
20	173.7178
50	434.2945
100	868.589
1,000	8,685.89

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