neper

ne·per (Np),

(ne'pĕr),

A unit for comparing the magnitude of two powers, usually in electricity or acoustics; it is one half of the natural logarithm of the ratio of the two powers.

Synonym(s): napier

[fr. neperus, latinized form of (John) Napier]

ne·per

(nē'pĕr)

A unit for comparing the magnitude of two powers, usually in electricity or acoustics; it is one half of the natural logarithm of the ratio of the two powers.

[fr. neperus, latinized form of (John) Napier]

neper

(nē′pĕr, nā′)

[John Napier, Scot. mathematician, 1550–1617]

,

Np

A unit of measure denoting the ratio of two amplitudes. It is similar to the decibel but is expressed as a natural logarithm instead of a logarithm of the base 10. 1 Np = 8.687 dB.