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[[Image:Reassigned spectrogral surface of bass pluck.png|thumb|400px|
Reassigned spectral surface for the onset of an acoustic bass tone having a sharp pluck and a fundamental frequency of approximately 73.4 Hz. Sharp spectral ridges representing the harmonics are evident, as is the abrupt onset of the tone. The spectrogram was computed using a 65.7 ms Kaiser window with a shaping parameter of 12.]]
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&= \frac{\partial }{\partial t} \arg\{ X(t,\omega_{0}) \}
\end{align}</math>
Just as each bandpass filter in the short-time Fourier transform filterbank may pass at most a single complex exponential component, two temporal events must be sufficiently separated in time that they do not lie in the same windowed segment of the input signal. This is the property of separability in the time ___domain, and is equivalent to requiring that the time between two events be
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[[Category:Time–frequency analysis]]
[[Category:Transforms]]
[[Category:Data compression]]
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