Table of Contents

 1     Scope and object       
        1.1     Scope 
        1.2     Object
 2     References   
 3     Definitions   
        3.1     Terms defined elsewhere
        3.2     Terms defined in this Recommendation     
 4     Abbreviations and acronyms  
 5     Artificial ear types      
        5.1     Type 1 artificial ear         
        5.2     Type 2 artificial ear         
        5.3     Type 3
        5.4     Calibration of the artificial ears type 1 and type 3.2
        5.5     Performance verification of the artificial ears types 2, 3.1, 3.3 and 3.4               
        5.6     Atmospheric reference conditions
        5.7     General requirements      
        5.8     Ear-drum reference point to ear reference point correction     
Annex A – A practical procedure for determination of the acoustic input impedance of artificial ears    
        A.1     Introduction     
        A.2     Calibration of the impedance probe           
        A.3     Artificial ear calibration 
Appendix I – Comparative acoustical input impedance measurements on the artificial ears Types        3.3 and 3.4 and on human ears    
        I.1     Introduction      
        I.2     Data overview   
        I.3     Artificial ear measurements           
        I.4     Human ear measurements             
        I.5     Comparison between human and artificial ear measurements               
Appendix II – Illustration of the mobile phone-shaped impedance probe used in Appendix I