One drone, four microphones and a loudspeaker: nothing more is needed to determine the position of walls and other flat surfaces within a room. This has been mathematically proved by Prof. Gregor Kemper of the Technical University of Munich and Prof. Mireille Boutin of Purdue University in Indiana, USA. (1)
The only way to see is to speak.
The only way to hear is to see.
The only way to taste is to cook.
Don’t you see?
There is nothing to see…
There is everything to create.
Your senses do not connect you with the cosmos.
They connect the cosmos with you!