CONTENTS

 1     Scope
 2     Normative references
 3     Definitions and abbreviations
        3.1     Definitions
        3.2     Abbreviations
 4     Test arrangement
        4.1     General
        4.2     Positioning of the HATS
                  4.2.1     Desktop hands-free
                  4.2.2     Other types of hands-free terminals
 5     Acoustic characteristics
        5.1     Sound pick-up
        5.2     Calibration of the artificial mouth of the HATS
        5.3     Equalization of HATS for test of receiving characteristics
        5.4     Combination of left and right ear receiving sensitivity
 6     Application of HATS for subjective evaluation procedures