https://slavyanski.net/sb2020/story.php?title=%EB%84%A4%EC%9D%B4%EB%B2%84-%EB%B8%94%EB%A1%9C%EA%B7%B8-naver-weblog-apps-on-google-play-5 If the window’s covered with glass, they may perhaps use lasers to detect vibrations on the glass brought on by the sounds in the space – such as a conversation. Sun, 31 Jul 2022 14:15:00 UTC en