ACOUSTIC INTERFERENCE Sound: The cicada produces sound by collapsing and un-collapsing a ribbed plate on its body. The acoustic façade generates sound similarly through the pushing of curved metal plates, which “pop” when they change form. Tubes of various lengths located behind the plates amplify this noise and create a variety of pitches. The activation of sounds by users or electronics from either the outside or the inside provides the potential for a new type of environmental projection in a low-energy region.