CCIR

Comité Consultatif International pour la Radio (Consultative Committee on International Radio). Formed in 1927 to manage the international radio frequency spectrum and to develop standards for radio broadcast systems, primarily in Europe. In 1932, the CCIR merged with the International Telegraph Union (ITU) and several other organizations to become the International Telecommunication Union in 1934. In 1992, the CCIR became the ITU-R, the radio communications section of the ITU. The CCIR Curve is a standardized weighting curve for the measurement of noise, for instance, in microphones. The standard was originally numbered in the CCIR system as CCIR 469-4 but is now maintained by the ITU and named ITU-R BS.468-4.