The two word term that describes both a room whose walls reflect sound and an area in which someone's own ideas are reflected is :
Echo chamber
in other translation, echo chamber means a belief that reinforced by a defined system
They kept all of their knowledge written down and their language is still here today to decipher what they have said.
If unemployment is rising rapidly, the federal reserve most likely :
Buy securities in open market operations
This way, the companies will have enough money to hire more people
hope this helps
