ITU-T P.581 PDF

This Recommendation ITU-T P.581 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]. Test positions, equalizations and calibration are specified, and the binaural test conditions are also considered. The test methods for both send and receive characteristics testing are also 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].