In a Sound Chamber
Two NASA employees stand in front of Intelsat IV in its sound-absorbing, or anechoic, chamber in this 1972 photo. Intelsat, or the International Telecommunications Satellite, was built by the Hughes Aircraft Company for an international consortium of 65 nations to meet the growing demand for channels of communication and greatly expanded the commercial communications network. Intelsat IV was placed in a synchronous orbit over the Atlantic Ocean with the capacity of about 6,000 circuits or 13 television channels.
Image Credit: NASA