scope:

This Recommendation is the result of a study held within ITU-T for defining the electro-acoustic testing methodologies for headsets, which provide the best correlation with the performance of headsets in real use, when using the couplers currently recommended in [ITU-T P.57].

The results of this round robin test, aiming to compare the acoustic behaviour of headsets placed on humans and on the head and torso simulator (HATS), can be found in the Bibliography.

The recommended test methodology is based on the use of HATS, as this is the best approximation of acoustical conditions occurring in the real use of headsets.

This Recommendation focuses specifically on headsets and overrules [ITU-T P.57] regarding the applicability rules of artificial ears to specific receivers, as long as these devices belong to the headsets.

This Recommendation is complementary to the relevant [ITU-T P.64], [ITU-T P.79], etc., which specify the electro-acoustic and telephonometric testing methods that are applicable to the telephone devices.

The recommendation of performance descriptors, such as masks or limit values, is left to the relevant performance standards.