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what is power spectral density weamp;#39;re going to look at an example and then some maths and then have a couple more examples at the end and here is an example of my voice recorded saying the word density and Iamp;#39;ve recorded it twice and you can see that these waveforms are not the same they are different waveforms and thatamp;#39;s because they are random so theyamp;#39;re random processes and weamp;#39;re very much interested in characterizing random processes mathematically and one thing weamp;#39;ll be interested in is in their Spectrum content so the spectral density so how do we go about doing that for these signals for me saying the word density as an example well something we could do is we could take each of these waveforms and take their Fourier transforms and thatamp;#39;s what Iamp;#39;m showing here of course these two Fourier transforms are different because the original signal was different and so then weamp;#39;re left with thinking to ourselves how do
