Apple Says 'Hey Siri' Detection Briefly Becomes Extra Sensitive If Your First Try Doesn't Work

A new entry in Apple's Machine Learning Journal provides a closer look at how hardware, software, and internet services work together to power the hands-free "Hey Siri" feature on the latest iPhone and iPad Pro models.
Specifically, a very small speech recognizer built into the embedded motion coprocessor runs all the time and listens for "Hey Siri." When just those two words are detected, Siri parses any subsequent speech as a command or query.The detector uses a Deep Neural Network to convert