Fact · Dictation on Mac
In Apple's 2017 Hey Siri article, audio reaches the Siri server only if the stages on the iPhone pass it on.
Checked against its source on October 16, 2026
In the source's own words
“If the various stages on the iPhone pass it on, the waveform arrives at the Siri server.”
Hey Siri: An On-device DNN-powered Voice Trigger for Apple's Personal Assistant, Apple Machine Learning Research, 2017, Section headed Further Checks.
Open the original- What it measures
- This describes the wake-word path: the on-device detector runs first, and only passed audio goes on to the server. It is the clearest published statement of the order of on-device and server stages in Siri's speech path.
- What it does not show
- Describes the 2017 'Hey Siri' path, not the current Dictation key. It shows the design principle, not the current routing of your dictation.