This Recommendation specifies the use of the head and torso simulator (HATS) for hands-free (including speakerphone@ loudspeaking and headset functions) and handset terminal testing. It applies for subjective tests@ e.g.@ as described in [ITU-T P.832] or for objective measurements as described in@ for example@ [ITU-T P.340]. The test positions@ equalizations and calibration are specified. The binaural test conditions are also considered. Test methods for both send and receive characteristics testing are specified. For the applications described in this Recommendation@ the HATS consists of a head mounted on a torso that extends to the waist. The head is equipped with two artificial ears according to [ITU-T P.57] and with a mouth simulator. The HATS is specified physically as well as acoustically@ in [ITU-T P.58].