[2] The sound of the microphone has been described as "British" with a "BBC politeness",[3] and its appearance has been likened to that of a waffle iron.
[6] It was designed as a result of the BBC's request for a strong and affordable microphone that was smaller than previous models[7] (such as the Type A).
[8] The microphone was produced by Standard Telephones and Cables[9] before their manufacturing was transferred to Coles in the mid-1970s.
[3][12] The microphone became a favourite of British recording engineers in the 1950s and 60s, but did not receive widespread use in the United States.
[14] At one point, Bush House, the former home of the BBC World Service, used the 4038 almost exclusively.