Fabricated a door with embedded magnetic coils that would excite magnets  embedded in glasses to allow the viewer to listen into other spaces.
“Listening through doors with a glass never worked too well for us in real life.  But we have now connected a door to many other spaces, where a visitor  may place a glass upon and listen to activity in the space beyond. Shifting a glass along an otherwise plain looking door reveals the sounds of  hidden spaces, beyond that door, so that the visitor might know where to go next.”