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spectral density |
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spectral density [′spek·trəl ′den·səd·ē] (electromagnetism) (mathematics) The density function for the spectral measure of a linear transformation on a Hilbert space. (systems engineering) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| It is the square root of the power spectral density of magnetic field fluctuations at the magnetometer frequency. [28] If the assumption that the signal is stationary does not hold, it is not possible to apply basic theorems that define the power spectral density function of a signal as the Fourier transform of its autocorrelation function. The vibration profile may consist of a single power spectral density over a specified frequency range, or it may include any number of amplitude steps with increasing or decreasing amplitudes at higher or lower frequencies. |
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