The "'neper "'( unit symbol "'Np "') is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals.
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As is the case for the decibel and bel, the neper is a unit of the International System of Quantities ( ISQ ), but not part of the International System of Units ( SI ), but it is accepted for use alongside the SI.
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And are both in units of angular frequency . is called the " neper frequency ", or " attenuation ", and is a measure of how fast the transient response of the circuit will die away after the stimulus has been removed.
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Most elegantly, if the natural logarithm is used, yielding the neper as logarithmic units, scaling by 100 to obtain the centineper yields units that are infinitesimally equal to percentage change ( hence approximately equal for small values ), and for which the linear equations hold for all values.
