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Sergey Brin, co-founder of Google, appears at the keynote with the Google Glass to introduce the Google Glass Explorer Edition during Google's annual developer conference in San Francisco on June 27, 2012. Kimihiro Hoshino//AFP/GettyImages
Google is set to test its augmented reality (AR) prototypes in public starting in August, the company announced on July 19.
Some of the prototypes will look like normal glasses, but with an in-lens display and “visual and audio sensors” like a microphone and camera, the company said.
