Help identifying the cause of the "pop"

There is a DeClicker plugin for Audacity here , it can automatically remove pop/click noises.
However that DeClicker plugin is slow : it takes longer than playback time to process the audio, but it’s faster than removing them manually.

DeClicker settings to remove cork-pop noise.png
DeClicker settings to remove mouth clicks.png
Even after both those DeClicker settings have been applied, your audio still needs noise-reduction & DeEssing , IMO.