A late career artist known for sparse installations where visitors confront the ethereal beauty of light, Doug Wheeler considers ‘perception’ his medium. This opinion is driven home with particular clarity in PSAD Synthetic Desert III, a recently opened exhibition at NYC’s Guggenheim Museum that brings an unrealized 1968 installation idea to life — and takes advantage of the gains that have been made in architectural acoustics and materials in the (almost) half-century that has elapsed since he conceived the work through drawing. This spatial environment offers visitors the chance to sit in a (semi) anechoic chamber and stare out into a quasi-horizon that gives the impression of empty space – like a horizon stretching into the distance. Making themselves comfortable on a tiny platform that juts out over a field of triangular sound-dampening baffles, visitors have little to do but sit and soak up the silence.