There's some speculation in this Wired article: https://www.wired.com/story/lasers-hack-amazon-echo-google-home/ https://www.wired.com/story/lasers-hack-amazon-

There's some speculation in this Wired article: https://www.wired.com/story/lasers-hack-amazon-echo-google-home/ https://www.wired.com/story/lasers-hack-amazon-echo-google-h... The thermal effect is one, where the membrane heats up and makes the surrounding air expand. The other is the light hitting photosensitive electronic components. Discussed here: https://news.ycombinator.com/item?id=21445043 https://news.ycombinator.com/item?id=21445043