An Opera Built On Sounds Too Low For Us To Hear

"For most of the work's duration, twenty-four subwoofers, placed with their cones pointed upward, emit electronic tones that vibrate at a frequency of 10.67 hertz, or around ten oscillations per second. ... Human ears can't detect sounds much below twenty hertz, but you register their presence all the same. ... The body is listening even when the ears tune out." Alex Ross checks out Ashley Fure's "opera for objects," The Force of Things.