power spectral density

Synonyms:
  • power spectrum
  • PSD
  • spectral density
German: spektrale Leistungsdichte
Japanese: パワー・スペクトル密度

Physics. The power spectral density describes how the power of a signal is distributed with frequency. For example, it is applied to analyze biological time-variable functions such as electroencephalography (EEG), electrocardiography (ECG) and evoked potentials (EP).

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