http://www.engadget.com/entry/7291854653129408/
http://pc.watch.impress.co.jp/docs/2004/1018/yamaha.htm

LITERAL (Fuente: Engadget blog):
Yamaha has for a while been marketing in Japan a line of soundproofed rooms-within-a-room for musicians that you can set up in a corner of your already-cramped home. The latest evolution of the range, however, appears to be intended for the opposite purpose, that of shutting out the outside world so that you can work, study, watch DVDs, and so forth. Y440,000 ($4,000) or so gets you a 1.3 x 1.7 m space in which to do whatever you feel like, with a range of interior options and phone, ethernet and TV connections should you require them. We’re getting a bunch installed at Engadget HQ next week in the hope that it’ll help with the terrible bouts of agoraphobia we’ve been getting since we moved to this open-plan penthouse.