In Japanese language, there are some onomatopoeias to describe silence despite onomatopoeia is generally word for sound.
For example, Shin-shin is sound of snowing, and Koh-koh is sound of moonlight.
To figure out what the sound of silence could be, I made two sound sculptures.
For Shin-shin, white incenses are connected in the form of a regular icosahedron which reminds snowflake and bells were put to each apex. Set on fire to the incense and when the fire reach to apex, bells drop on the ground and make a sound.
For the other one, Koh-Koh is made with rotating singing bowl and wooden stick. When they hit each other they make a sound.