Probably less than you think.
The custom privacy solutions that Speech Privacy Systems recommends vary depending on a number of factors, most importantly the size of the area and the combination of treatment options required. However, a good place to start the “mental math” is to estimate $1 to $2 per square foot installed.
For example, a 100,000 square foot floor minus rest rooms, stairwells, mechanical rooms, and break rooms might only have 80,000 square feet that require treatment. So for a project this size start the investment estimate at $80,000. Now let’s be conservative and estimate you’d recover 5 minutes per worker (studies regularly show almost 3x that). The system would pay for itself in less than year, and could provide an ROI of more than $400,000 over 5 years.
Considering the benefits of better speech privacy, most organizations can’t afford NOT to invest in a speech privacy system.