This text is silent.
Written words, make no sound. They are visible though. As similar to a painting is visible, and never it will speak.

What is sound?
Sound colours the silence. Imperative features of sound are: it is audible, it is invisible, it has a time span.

In our world, little silence is left, not for a long period of time in any case. Just listen.
It is in the afternoon and I’m seated in my arm chair, writing. Before long, a sound will arrive. Indeed…from a distance a soft growling appears, becoming louder and louder, filling the room and then slowly it ebbs away. Silence yet again reigns. Time and again this scene repeats itself.
It is the sound of traffic. Every motored passer-by makes his own music, in his distinct rhythm in his own time. And silence frames this music, like running grooves do on a record. They belong to each other.