This Recommendation specifies the artificial mouth for telephonometric use. The methods of use of the artificial mouth are outside the scope of this Recommendation.
ITU-T P.51 FRENCH-1996 Referenced Document
ITU-T O.131-1988 QUANTIZING DISTORTION MEASURING EQUIPMENT USING A PSEUDO-RANDOM NOISE TEST SIGNAL
ITU-T P.64-1993 (WITHDRAWN) Determination of Sensitivity/Frequency Characteristics of Local Telephone Systems - Telephone Transmission Quality Objective Electro-Acoustical Measurements Study Group XII; 21 pp