A sound proofed sofa! TI must have this one for the living room. The neighbours will appreciate it.
One 8’x4’plywood board cut in 2’by 2’ module, joined with finger joins and organized in 3 independent self-supporting wood elements. The elements work structurally when are compressed to each other with a nylon tighten cable. Pyramidal sound-proof foam as cushion. No nails no glue no screws.