CHAPTER 7

The Human Interface

Voice and Language

“How will I live without Alexa?” a genuine question from my 10-year-old daughter while we were moving home earlier this year. She is proof that voice will be a central part of the human–digital interface. Not just because of what it can do already, that is book a cab, play your music, turn up the heating, or add items to your shopping list, but because of what its potential is. The simplicity of a voice interaction is seductive, whether you use Alexa, Siri, Cortana, Google Talk, or any other voice assistant.

There are many challenges with the current version of many of these technologies—for example, most voice assistants don’t recognize voices. Consequently, they react to all voices, including ...

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