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TechRadar
TechRadar
Alex Blake

An Apple Siri mystery has been solved by an audio engineer — spectrogram reveals how Apple stopped voice assistant setting off millions of iPhones and HomePods during its WWDC 2026 event

An iPhone showing the Siri logo next to waveforms showing speech at WWDC 2026.
  • Apple avoids setting off your iPhone when its execs say “Hey Siri” at events
  • One enterprising engineer decided to find out why
  • By analyzing the keynote’s audio, they solved an intriguing mystery

Siri has just been given the brain transplant it's needed for years, but it's always been good at detecting the words "Hey Siri" — so much so that accidental summonings have been a common problem. But an audio engineer has just explained how Apple cleverly avoided Siri popping up on your phone during its recent WWDC 2026 keynote.

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