neper noun. ['ni:pǝ, 'neɪ-] E20.
[Neperus, Latinized form of Napier: see NAPIER'S BONES.]
A unit used in comparing voltages, currents, power levels, etc., esp. in communication circuits, the difference in nepers being equal, for voltages and currents, to the natural logarithm of their ratio or, for power differences, to half of this.

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