Alexa, who are you? New book identifies Amazon's secret voiceover artist

The voice of Alexa, the virtual assistant developed by Amazon, is provided by Nina Rolle, a Colorado-based voiceover artist, according to a new book. Amazon has never revealed who provides the default female voice that responds to commands and questions given to Alexa, but the author Brad Stone said he identified the voice as Rolle's after "canvasing the professional voiceover community" for his new book, Amazon Unbound: Jeff Bezos and the Invention of a Global Empire. Rolle, who is based in Boulder, has conducted voiceover work for clients including Honda, Jenny Craig and Chase bank. According to Stone's book, she was selected after Amazon spent months assessing various candidates, with the final choice signed off by Jeff Bezos, the company's founder. Stone writes that Rolle said she was unable to talk about the role when he contacted her in February.