Office Phone Booth FolioWhat is the Folio office phone booth? The Folio is a soundproof office phone booth designed for one person to take private calls, join Zoom meetings, or focus on deep work inside a busy open plan office. It is ISO 23351 1 accredited the European standard for office acoustic enclosures and ships with furniture, LED lighting, ventilation, and a built in desk included. How quiet is the Folio phone booth? The Folio uses high density acoustic panels