Tom Dart wrote a really interesting piece on how we change our accents when we talk to machines. From Y’all have a Texas accent? Siri (and the world) might be slowly killing it:

“Most people have what we would call a telephone voice, so they actually change away from their local family accent when they’re speaking on the telephone to somebody they don’t know,” said Alan Black, a Scottish computer scientist who is a professor at the Language Technologies Institute at Carnegie Mellon University in Pittsburgh.

They also have a “machine voice”, he said. “People speak to machines differently than how they speak to people. They move into a different register. If you’re standing next to somebody in an airport or at a bus stop or something, you can typically tell when they’re talking to a machine rather than talking to a person.”

This part on the design of Siri is really interesting:

Black speculated that “one of the reasons they designed Siri to be fundamentally a polite, helpful agent who isn’t your friend but works for you, is to encourage people to be somewhat polite and explicit to her, rather than being very colloquial. Because speech recognition is always hard when you drop into colloquialisms.”