Pinholes and Plastic Wrap Make Solid Walls "Transparent" To Sound
First time accepted submitter benonemusic writes "Researchers have devised a means of making sound transmit easily through rigid surfaces, including walls. The process relies on creating small holes on a wall, and covering them on one side with a thin covering made from plastic wrap."
+1 lol
I've fallen off your lawn, and I can't get up.