Using pyaudio to stop recording under certain sound threshold

[Twanski94]

google this verbatim: 'use pyaudio to detect motion near microphone'
it should bring you to a place where you can read the section of "Security with Intelligent Computing and Big-Data Services 2019: Proceedings of the 3rd International Conference on Security with Intelligent Computing ... in Intelligent Systems and Computing (1145))"
where something very similar was done to create a motion detector, using pyaudio.
The book costs $220.00, so I expect you want to purchase a copy. But you should be allowed to read the section of interest. (starts on page 296) and shows references.
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Thanks for the reply! I'll check it out