CONTENTS

 1     Scope        
 2     References             
 3     Definitions and abbreviations          
        3.1     Definitions   
        3.2     Abbreviations and acronyms 
 4     Test arrangement  
        4.1     General        
        4.2     Positioning of the HATS          
 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 receive characteristics            
        5.4     Combination of left and right ear receive sensitivity   
 6     Application of HATS for calibration of headphones used for subjective evaluation procedures