A longstanding conspiracy is the tale of how Facebook is listening in on your conversations, but the way it is actually serving you ads is much more unsettling.
The official position is it has an enclave that locally listens only for the wake-word, and when it hears that, it activates the audio connection to the cloud.
The official position is it has an enclave that locally listens only for the wake-word, and when it hears that, it activates the audio connection to the cloud.