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IEVref:103-09-05ID:
Language:enStatus: Standard
Term: power spectral density
Synonym1: power spectrum density
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Definition: for a quantity having a continuous spectrum and a finite mean power, limit, at any frequency, of the quotient of the power within a frequency band containing that frequency by the bandwidth when the bandwidth tends to zero

Note 1 to entry: The instantaneous power of a quantity is by convention equal to the square of its instantaneous value. This square is proportional to a physical power if the considered quantity is a field quantity.

Note 2 to entry: The power spectral density is the Fourier transform of the autocorrelation function.


Publication date:2009-12
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Internal notes:2017-02-20: Editorial revisions in accordance with the information provided in C00020 (IEV 103) - evaluation. JGO
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