Graphics, Illustration and Visual Communication Design Listening to Transparency Exhibition of Sound Art by Xulei Li Listening to Transparency was an exhibition consisted of 44 audio and visual art works. Focusing on spatialization design and using any kind of transparent materials, most of these installation art pieces convey the status of optics and ability of visual expression behind the meaning of transparency. The visual design is based on circular waves representing sound sources. The waves are of various angles and curvatures. The visual have a transparent look, representing the transparent material used by the art pieces, as well as the transient and untouchable sound.