What is the Silliest Accessory You Have Ever Seen.

"Real scientists conduct experiments to help evaluate empirical evidence"

That may be a bit of a stretch in some areas of science. In many of them, experiments are done to evaluate hypothesis which may, or may not, be based on empirical evidence.

As it is these days, in the end something does get measured in most, if not all, experiments conducted.

I try to control the sound in my room with mostly vented anngular devices on the ceiling and on the floor to capture and redirect energy at or near my listening position.
Some of these are permanently mounted some are portable. In either situation they are all direct coupled to the floor or the ceiling.
No springs damper gliders no sliders..I want to keep all the energy and control its direction.

I see these angles I installed 25 yrs ago in a much better light now that I have moved ahead with an active laminar flow device that also actively treats the air..I have been doing that all along for 25 years with the passive devices I installed back then including the Argent Room Lenses. The active device now gives me more control and improved focus over the entire listening area..The only combing of the air devices I use are at the first reflection points and 3 along the 21ft wall behind the equipment and the speakers. The panels I constructed have have long hair sheeps wool suspended and covered with fabric. Foam and fiberglass sound as if I am wearing a hoodie or a toboggan. This is how I operate. Tom

Butt we also have companies design foam and fiberglass devices because they can be easily packaged boxed and shipped so when they are crushed along the way they can spring back into their contrived shape. Their existence does not confirm that there is not a better way to control and maintain live dynamics in a sound room.
Same old same old crap on any given day. 

If you want new and creative control over air flow high and low pressure drops look at F1 and Skunk Works.  Tom