You can find your audio commands by visiting your Google voice and audio activity history page. Ariel Zambelich/NPR hide caption

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While viral videos are a common feature of modern Internet life, recently a few audio clips, including sounds from a comet, have become popular. Underwood & Underwood/Corbis hide caption

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Cookie Marenco records musicians on a small remote recording console live at the California Audio Show in August. She'll demonstrate the quality of DSD to the audience by playing back her recording. How close will it sound to the live performance? Very close, according to people present. Cindy Carpien hide caption

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Inspired by the movie Robin Hood, Olympic sound man Dennis Baxter places microphones along the path to the target to capture the sound of arrows in flight. Paul Gilham/Getty Images hide caption

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