et

neeper

1 substantive

Terminological databases

Metroloogia terminibaas

ID 572886 Last modified 17.09.2026
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Domain metrologyunits of measurement
  • võnkeliikumise võimsuse suhte (heli taseme) SI välise ühiku nimetus/tähis
  • name/symbol of the off-system unit for logarithmic quantities that are accepted for use with the SI
neeper
Usage examples
  • Neeper, tähis Np, on logaritmiline ühik kahe füüsikalise suuruse suhte ehk signaali tugevuse või kao (sumbuvuse) mõõtmiseks. Neeperi väärtus leitakse kahe amplituudi või võimsuse suhte naturaallogaritmi abil. Üks neper on võrdne umbes 8,68 detsibelliga (dB). Neeper on saanud nime logaritmide leiutaja John Napieri järgi.
Good to know
  • Neeper on aktsepteeritav koos SI-ga.
Np symbol
Usage examples
  • 1 Np = ln e = 1.
neper
Usage examples
  • The neper (symbol Np) is a logarithmic unit used to measure the ratio of two physical quantities - specifically, signal strength or loss (attenuation). The value of a neper is determined using the natural logarithm of the ratio of two amplitudes or powers. One neper is equal to approximately 8,68 decibels (dB). The neper is named after John Napier, the inventor of logarithms.
Good to know
  • Neper is acceptable with SI.
Np symbol
Usage examples
  • 1 Np = ln e = 1.

Word forms

Inflection Type 2e

neeper neeprid
neepri neeprite
neeprit neepreid

Etymology

laensõna
  • neeper Šoti matemaatiku John Napieri (ladinapäraselt Ioannes Neper, 1550–1617) järgi
    • Neper 'neeper'
      • neper 'neper'
    • непер 'neeper'
      • neper 'neper'

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