Voice Assistant Privacy: What Alexa, Siri and Google Assistant Really Record
There is a smart speaker in roughly a third of homes in the US and UK, and a voice assistant on essentially every smartphone. The recurring worry — "is it listening to everything I say?" — has a more interesting answer than either the marketing or the conspiracy theories suggest. The honest version: these devices are always listening in a narrow technical sense, but they are not always recording . The gap between those two things is where the real privacy questions live, and it is a smaller gap than most people assume. How Wake Word Detection Actually Works A smart speaker runs a small model locally that does one job: listen for a specific acoustic pattern — "Alexa," "Hey Google," "Siri." Audio streams continuously through a short buffer on the device and is discarded moment by moment. Nothing leaves the device until that pattern matches. When it matches, the light ring or screen indicator activates and the device opens a connection to t...