@shannonpersists @Unixbigot And on top of that, the wake word detection system doesn't know your specific voice (at least not until quite recently), so it has to listen for the wake word in many different accents, with or without background noise, whispered close up or shouted from across the room, and so on. People have managed to make these systems quite good, but they do need to cast a fairly broad net, so to speak. Which means there's always going to be some chance that they misinterpret other noises as the wake word.
@diazona @shannonpersists I recently considered getting a custom wakeword. The hardware vendor says they will need at least 20000 recordings from at least 500 speakers of all ages under various (specified) conditions. It would take several weeks to train the model and cost <contact sales> dollars. Reader, I did not contact sales because by that point I suspected the fifty four cents I had to hand would not suffice.