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The presence of echo during a phone call can be extremely irritating. Echo consists typically of the speakers sound being picked up by the microphone with a certain delay (10-200ms). One of the causes of this are low quality headsets (no noise cancellation) or a bad setups (the microphone & speaker are placed too close together).

My question is following: Is it possible to detect echo in an audio recording of only one call party? (This is a recording of one side of the call but due to the echo, you can hear both sides; the second party with a lower amplitude obviously) I do not need to cancel the echo, I just want to detect its presence to a certain degree and accordingly recommend a change in the setup.

I appreciate any suggestions and hints, thank you in advance :)

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    $\begingroup$ Welcome to DSP.SE, SuperKogito! Maybe you find some ideas in the answers to this question and in the second half of this answer. $\endgroup$ – applesoup May 26 '20 at 17:46
  • $\begingroup$ @applesoup Thanks for the suggestions, they are quite useful. But from what I can see I would need the target "clean" output signal (which I don't have in my case) for these algorithms? am I missing something? $\endgroup$ – SuperKogito May 27 '20 at 9:23

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