We can think of many reasons you might want a soundproof enclosure inside your home. The My Room II from Yamaha is a fully enclosed human-sized vault that makes sure there is no space for external distractions like spouses, cats or smoke alarms.

This soundproof mini-room looks like a wine vault from the outside and enriches you with the best in soundproof privacy. The My Room II is a refined version of the original My Room, which was launched in 2004. The mini-room guarantees increased comfort, thanks to touch-panel controls, air conditioner mounting and reduced construction time. I don’t think you would mind spending a cool ¥664,650 (about $6,500) on a 1.5 tatami mat-sized My Room II to carry out your hush-hush tasks.

Via Bornrich.org