How many staff members making calls on an open-plan floor would justify an investment in office phone booths?

Even if only two to three team members are on calls simultaneously during peak hours, the impact on an open-plan floor extends to all nearby colleagues. Partial conversations from each call trigger Induced Speech Exposure (ISE) and impose cognitive load on everyone within earshot.

Generally, if a team makes ten or more calls per day in an open workspace, the return on investment (ROI) for acoustic phone booths is easily justified. Benefits include enhanced call quality, preserved productivity for fellow staff, and a more professional external image.