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Logarithmic scale - SI (Np)

ID:130282
GUID:-
Type:MEASURE
Version:38
Version date:2013-02-22
Status:DRAFT
Owner:IFD-Nederland

Names

en-INLogarithmic scale - SI (Np)
nl-NLLogaritmische schaal - SI (Np)

Description

Units

References

level of a field quantity
L(F) = ln ( F / F(0) ) where F and F(0) represent two amplitudes of the same kind, F(0) being a reference amplitude
[ISO 31-02:1992.2-09]


level of a power quantity
L(P) = 1/2 ln (P / P(0) ) where P and P(0) represent two powers, P(0) being a reference power
[ISO 31-02:1992.2-10]


logarithmic decrement
Product of damping coefficient and period
[ISO 31-02:1992.2-12]


logarithmic decrement
[ISO 31-07:1992.7-25]