I have a large room in my house, which I use as an open space office where several people are working on their own desk (see image below for an idea of how it looks like).
Several persons make many calls everyday and subsequently disturb the other people. What are some solutions to acoustically isolate their desk, so that they making calls doesn't disturb the others?
- I cannot move his desk
- I cannot ask people to wear headphones or earplugs
- Since I am renting the space, I cannot drill in the floor or ceiling
- I can only modify the desks (or immediate surrounding) of noisy persons