To your mind, what is the best way to detect an abrupt mean change in a mono component signal ? and in a multi component signal ?

24 July 2017 1 5K Report

in a causal way, of course

abrupt change usually appears as spike in a data. I think non-linear energy detector or its variant can be a useful tool for spike detection. Another approach can be to closely monitor instantaneous amplitude and instantaneous frequency as change would be reflected in these 2 parameters.

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