Content deleted Content added
Fgnievinski (talk | contribs) |
→Definition: Fixed a typo Tags: Mobile edit Mobile web edit Advanced mobile edit |
||
Line 7:
==Definition==
Like the [[decibel]], the neper is a unit in a [[logarithmic scale]]. While the bel uses the decadic (base-10) [[logarithm]] to compute ratios, the neper uses the [[natural logarithm]], based on [[Euler's number]] ({{nowrap|[[e (mathematical constant)|''e'']] ≈ 2.71828}}). The level of a ratio of two signal amplitudes or [[root-power quantity|root-power quantities]], with the unit neper, is given by<ref name=IEC> {{cite tech report |title=Letter symbols to be used in electrical technology – Part 3: Logarithmic and related quantities, and their units |number=[[IEC 60027-3]]:2002|type=International standard |institution= International Electrotechnical Commission |date=2002-07-19}}</ref>
:<math>
L = \ln\frac{x_1}{x_2}\mathrm{~Np},
| |||