Peak Spectral Power

Definition: Peak spectral power (PSP) is a measure of the amplitude or strength of a frequency component that is most prominent in a particular frequency range or spectrum. Data, e.g. time series, images, etc, can be decomposed into spectral power by applying transformations such as the Fourier Transform. Within a pre-defined frequency band, spectral peak power can be detected. In the context of fNIRS signal quality assessment, the PSP is computed to complement the scalp coupling index in order to enhance signal quality assessment.

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Related terms: Peak Spectral Density, data quality assessment, scalp coupling index

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