Spectral analysis: Difference between revisions

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'''Spectral analysis''' or '''Spectrumspectrum analysis''' is [[analysis]] in terms of a [[spectrum]] of [[frequencies]] or related quantities such as [[energies]], [[eigenvalues]], etc. In specific areas it may refer to:

* [[Spectroscopy]] in chemistry and physics, a method of analyzing the properties of matter from their electromagnetic interactions

* [[Spectral estimation]], in statistics and signal processing, an algorithm that estimates the strength of different frequency components (the power spectrum) of a time-___domain signal. This may also be called [[frequency ___domain]] analysis

* [[Spectrum analyzer]], a hardware device forthat achievingmeasures thisthe magnitude of an input signal versus frequency within the full frequency range of the instrument

* [[Spectral theory]], in mathematics, a theory that extends eigenvalues and eigenvectors to linear operators on Hilbert space, and more generally to the elements of a [[Banach algebra]]

* In nuclear and particle physics, gamma spectroscopy, and high-energy astronomy, the analysis of the output of a [[pulse height analyzer]] for characteristic features such as [[spectral line]], edges, and various physical processes producing continuum shapes

==See also==

*[[Multispectral analysis]]

*[[Harmonic analysis]]

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