SE Electronics PRO-modell har 6 olika lager:
"The Reflexion Filter has 6 main layers. Firstly, a strong layer of punched Aluminium which allows sound waves to pass through it, diffused, to a layer of absorptive wool. The sound waves then hit a layer of Aluminium foil which helps dissipate energy and break up the lower frequency wave-forms, and from here they hit an air space kept open by rods passing through the various layers. The air gap acts as an acoustic barrier. The sound waves then pass to a further layer of wool and then through an outer, punched, Aluminium wall which further serve to absorb then diffuse the remaining acoustic energy.
The main absorber has 4 formed pieces of state-of-the-art specialist acoustic absorptive material attached to its face via the extended separation rods, which further serve to absorb and then diffuse the sound waves as they pass to the main filter."
Det här verkar vara en enklare (äldre?) variant av den:
http://www.soundonsound.com/news?NewsID=8098
Här är någons hembygge:
http://blogs.oreilly.com/digitalmedia/2008/02/build-a-portable-vocal-booth.html
Kör på bara. Det kanske inte blir lika bra som den patenterade tekniken, men det kan ju vara ett kul bygge hur som helst.
Själv har jag en budgetkopia: http://www.thomann.de/se/the_tbone_micscreen.htm