Please silence your cell phones, iPods, corduroy pants, and crinoline dresses.

BRIAN MILLER from the Seattle Weekly tunes into + Room – Room here at the Henry.

The trick to appreciate this collaboration between Yann Novak and Jamie Drouin is to walk back and forth between the two rooms (which consist of white walls, benches, and speakers) and listen for the difference. The two visiting artists built their sonic dialectic from the original gallery “room tones,” originally recording the buzz and thrum and hiss of the creaky old ducts when the Henry was completely silent and empty. (“We let the AC have its own individual voice,” Novak drolly said during a recent walk-through.) Then they added digital processing and voilà—one room is positive, the other negative.

It’s like the world’s slowest DJ battle, with the turntables running at 2 rpm.