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I wonder if there is any use of phase spectrum, or we use amplitude information for all the tasks avaliable?

Alex K
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    I'm voting to close this question as off-topic because it's not a programming question at all, but maybe a signal processing question. However, minimal research into what the FFT is would've shown that no, just observing the amplitude information throws away half of the information in a signal. – Marcus Müller Apr 01 '18 at 11:22
  • Phase defines [delay of each frequency component](https://www.researchgate.net/post/What_information_is_contained_in_the_phase_spectrum_of_a_signal2), so this is a measure of signal shape – Agnius Vasiliauskas Apr 01 '18 at 11:39
  • @MarcusMüller "However, minimal research into what the FFT is would've shown that no, just observing the amplitude information throws away half of the information in a signal." For the record, it is much more complicated than that. But I have to agree : this question does belong to [dsp.stackexchange.com/](http://dsp.stackexchange.com/). – Paradox Apr 02 '18 at 12:50

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Yes. You can't reconstruct or filter a signal without the phase spectrum in addition to the amplitude information.

hotpaw2
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