ITU-T P.1311-2014 PDF

Scope: Recommendation ITU-T P.1311 describes a method for conducting a listening test that measures the intelligibility of multiple concurrent talkers in a teleconference.This Recommendation specifies how to conduct such a test, giving detail on stimulus design,creation of source material,selection of test conditions,calibration, selection and training of listeners,test administration,and reporting of results.This Recommendation includes an electronic attachment containing American English source material referenced in Appendix I.

ITU-T P.1311-2014 Referenced Document

ITU-T P.1301-2012 Subjective quality evaluation of audio and audiovisual multiparty telemeetings (Study Group 12)
ITU-T P.58-2013 Head and torso simulator for telephonometry (Study Group 12)
ITU-T P.800-1996 Methods for Subjective Determination of Transmission Quality - Series P: Telephone Transmission Quality; Methods for Objective and Subjective Assessment of Quality Study Group 12; 38 pp [Superseded: ITU-T P.80 ITU-T P.80]
ITU-T P.832-2000 Subjective Performance Evaluation of Hands-Free Terminals Series P: Telephone Transmission Quality Telephone Installations Local Line Networks Methods for Objective and Subjective Assessment of Quality Study Group 12

2014 ITU-T P.1311-2014 Method for determining the intelligibility of multiple concurrent talkers (Study Group 12)