Eusebio Sempere, a respected minimalist 20th century Spanish artist, created a sculpture composed of a three-dimensional array of polished stainless-steel tubes that rotates at its base.
In addition to its provocative visual effect as the moving surfaces reflect in the sunlight, it was also a sonic filter that blocked transmission of particular frequencies. A listener on one side heard a tonal modification of those sound sources located on the other side, the visual equivalent of colored glass prisms. This sculpture is an aural embellishment because it changes sounds that propagate through it.