Back again. Another challenging one (aren't they all supposed to be?), though not quite as much as the last one! Indeed a skosh more tangible. I'd thought of doing something based on this cool video: http://www.thisiscolossal.com/2013/06/the-visual-patterns-of-audio-frequencies-seen-through-vibrating-sand/ but happened upon an old package of rick-rack at a garage sale and decided it could represent sound waves. Sorta. Sound goes out, sound goes in. But if a tree falls in a forest...Cotton, cotton rick-rack, fusible web, machine-quilting.