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I am reading about mathematically modeling Speech using Source- Filter model. I want to know how can we prove that that the source filter model becomes an LTI system provided the configuration of filter remains the same?

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  • $\begingroup$ Hm, I'm not a speech synthesis expert, and haven't heard of the "Source-Filter model" before, but: a system including a data / speech source is not LTI, it produces something without external excitation. If it's only about filtering some excitation: Well, if your system is but a filter, it's as LTI as that filter is LTI. $\endgroup$ – Marcus Müller Nov 9 '20 at 20:14

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