| 释义 |
Definition of neper in English: nepernoun ˈneɪpəˈniːpəˈnā- Physics A unit of measurement used in comparing voltages, currents, and power levels, especially in communication circuits. The difference between two values in nepers is equal to the natural logarithm of their ratio for voltages and currents or to half of this for power differences. Example sentencesExamples - The frequency range covered by the GBT extends from low frequencies where the opacity is relatively low (~ 0.008 nepers) to high frequencies where opacity is very high.
- The dielectric loss in each case is rated in nepers of attenuation at some arbitrary frequency, 0.
- The neper is the natural logarithm of the power ratio.
Origin Early 20th century: from Neperus, Latinized form of Napier (see Napier, John). Definition of neper in US English: nepernounˈnā- Physics A unit used in comparing voltages, currents, and power levels, especially in communications circuits. The difference between two values in nepers is equal to the natural logarithm of their ratio for voltages and currents or to half of this for power differences. Example sentencesExamples - The dielectric loss in each case is rated in nepers of attenuation at some arbitrary frequency, 0.
- The frequency range covered by the GBT extends from low frequencies where the opacity is relatively low (~ 0.008 nepers) to high frequencies where opacity is very high.
- The neper is the natural logarithm of the power ratio.
Origin Early 20th century: from Neperus, Latinized form of Napier (see Napier, John). |