This Recommendation provides testing methods for headsets using the Head And Torso Simulator. The Recommendation addresses the following topics: selection of artificial ears, classification of headsets, positioning of headsets on HATS, test repeatability
ITU-T P.380-2003 history
2003ITU-T P.380-2003 Electro-acoustic measurements on headsets Study Group 12
1993ITU-T P.38-1993 Transmission Characteristics of Operator Telephone Systems (OTS) - Telephone Transmission Quality - Subscribers' Lines and Sets (Study Group XII) 4 pp