What a nice trick! Interesting that dust guards doesn't block it, wonder if it is direct momentum transfer or heat expansion in the target material that drives the signal...
"Researchers in Japan and at the University of Michigan said Monday that they had found a way to take over Google Home, Amazon’s Alexa or Apple’s Siri devices from hundreds of feet away by shining laser pointers, and even flashlights, at the devices’ microphones."
They have a pretty nice website for this trick too: https://lightcommands.com/