Wake word detection
Wake word detection is the tiny, always-on model that listens for a trigger phrase ('Hey Siri') and only then activates full speech recognition.
The design is privacy-and-power-driven: a micro-model runs on-device continuously, while heavyweight ASR runs only after the wake word. False accepts and rejects are its quality axes.
Related terms
Frequently asked
What is Wake word detection?
Wake word detection is the tiny, always-on model that listens for a trigger phrase ('Hey Siri') and only then activates full speech recognition.
Why does Wake word detection matter?
The design is privacy-and-power-driven: a micro-model runs on-device continuously, while heavyweight ASR runs only after the wake word. False accepts and rejects are its quality axes.
What terms are related to Wake word detection?
Closely related concepts: Keyword spotting, Voice activity detection (VAD) — each has its own entry in this glossary.