An office pod enclosing a soundproof workspace inside of the pod, comprising a wall structure formed of a sound absorbing element and a skin layer, wherein the skin layer has a coincidence frequency outside of a predetermined human speech frequency region.

An office pod enclosing a soundproof workspace inside of the pod, comprising a wall structure formed of a sound absorbing element and a skin layer, wherein the skin layer has a coincidence frequency outside of a predetermined human speech frequency region.

A wall assembly for a soundproof space includes a wall module having a first wall and a second wall joined together at end portions of the module to form an enclosure therebetween, and sound absorbing material within the enclosure. The enclosure is formed of the first wall and the second wall, and the first wall and/or the second wall provides an incombustible surface. A soundproof booth includes the wall assembly.