Hi, You have a gold covered insulating box with two gold ornaments on top that are pointing at one another with a small air gap between them.
Now you beam a radio signal at the box. The gold covered box acts as an antenna, and at sufficient wireless strength, a spark will jump the gap between the ornaments. If the ornaments are not absolutely identical down to atomic distances, then one of the two will have a sharper "point" than the other and thus emit electrons more readily, so the spark gap acts as both diode and loudspeaker. (A plasma can be used as a load speaker.) The box itself acts as a resonant cavity for the sound waves much like the body of a violin or classical guitar. Cloud storage:- Unsafe, Slow, Expensive ...pick any three.
