聲音藝術？Planephones

http://en.wikipedia.org/wiki/Planephones

http://en.wikipedia.org/wiki/File:Planofoni4.jpg

Planephones differ from conventional sound diffusion systems[6] in that the sound acquires the timbral quality[7] of the material employed[8] and, in addition, by diffusing the sound homogeneously[9] along the surface, permits designing the acoustic space.[10] according to the architectural space.

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