neper

名词 n.
中文释义

英文释义

名词 n.
  1. A non-SI unit of the attenuation (or sometimes gain) of field and power quantities such as electronic signals; the natural logarithm of a ratio, with 1 Np (a ratio of 2.718:1) being equivalent to 8.686 dB.
    — Values of b, the amplitude attenuation constant, are given for various materials in Table 1.1. Having dimensions of [length]⁻¹, it is usually measured in nepers per centimetre (Np cm⁻¹).

词形变化

nepers plural

词源

From Joannes Neper, the Latinized name of John Napier, a Scottish mathematician.
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