How does multiple Apple devices react to ‘Hey Siri,’ yet only one device ultimately executes the command? How is communication established among these devices to ensure that only a single device responds, while the rest remain inactive?
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Your devices don’t have the processing power anyway to decode and understand speech. All they do is take a recording of your voice command and send it via internet to a central server operated by Apple. This server will, of course, notice that it got the very same recording, at the same moment and with the same time stamp, form multiple devices. Accordingly, the central server will only instruct one of the devices to do something.
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