One man's music is another man's jumbo jet. You could say that you are listening to electrons singing. When you apply a current to it, it sings. There was a famous film in the sixties in which a photographer unwittingly photographs a murder. He goes back to the darkroom and proceeds to make larger and larger enlargements of this little piece of film.
Film is made up of silver crystals.
When Bell Labs built a giant antenna in Holmdel, New Jersey, in 1960, it was part of a very early satellite transmission system called Echo. However, two employees of Bell Labs, Arno Penzias and Robert Wilson had their eye on the Holmdel antenna for quite a different purpose. They realized that it would make a superb radio telescope. At first, they were disappointed. It was like trying to tune into your favorite radio program and it being obscured with static.