Voice actor Susan Bennett was the original voice of the iPhone assistant Siri. It's fun to hear her use different voices in this video, made by Vox. Here's the full article.
Siri needs to be able to say just about everything in the English language, and that took a lot of hard work.
"I recorded four hours a day, five days a week for the month of July," Bennett says. For a voice actor, that workload causes a lot of strain. "That's a long time to be talking constantly. Consequently, you get tired."
The original Siri "was to sound otherworldly and have a dry sense of humor," Bennett says. She added that to her take on the character, even as she focused on staying consistent and clear.