No the parent is right. They are not "listening all the time". They're essentially sleeping while a separate process handles the audio stream looking for the wa

No the parent is right. They are not "listening all the time". They're essentially sleeping while a separate process handles the audio stream looking for the wakeword. When it finds the wakeword, it then "wakes up" the assistant which reprocesses the audio snippet to confirm the wakeword is really there (using more expensive analysis), before then actively listening to the rest of the audio.