Sometimes it feels like we're inching closer to a future like the movie Her, where humans spend their time wandering around, constantly chatting to their own personal AI assistants. Today, services like Siri, Alexa, and Google Assistant are getting better at responding to some types of requests, but because they can misunderstand questions and aren't cognisant of their surroundings, they're often super awkward to use in public spaces around other people. But a patent filed by Apple and made public today suggests Siri may someday detect when you're whispering at it, and in turn know when to whisper back.