What is Sound Sculpture?

Is it sculpture that incorporates sound? Sound that makes shapes? Strange homemade instruments? Interactive sound installations?

Yes!

The PAliens are sculptures with speakers embedded; they listen to their environment, reprocess the sound and use that as their voices.
Heavens Speak is an immersive sound installation with surround sound; constellations speak their myths to you from the right place in the sky.
Haunted Garden is a pure sound environment that sings harmony with the room. (though it has lights now too!).
Voice of Fire: the fire speaks to you.
The Oracle answers your questions over the phone, and then broadcasts them to the world.