It doesn’t exactly answer your question, but Apple has a decent description of how local “Hey Siri” detection works on the iPhone and watch: https://machinelea

It doesn’t exactly answer your question, but Apple has a decent description of how local “Hey Siri” detection works on the iPhone and watch: https://machinelearning.apple.com/2017/10/01/hey-siri.html https://machinelearning.apple.com/2017/10/01/hey-siri.html