�1����
Scope
�2���� Normative references
�3���� Definitions and abbreviations
�4���� Loudness rating parameters for
telephone sets
�5���� General algorithm for loudness
rating calculations
�6���� Calculation of SLR and RLR
�7���� Calculation of STMR
�8���� Calculation of LSTR
Annex A � Fundamental principles of loudness rating
calculations
������� A.1���� Introduction
������� A.2���� Definitions and symbols concerning
sound pressures, sensitivities and transmission losses
�������� ���������A.2.1���� Concerning talking
����������������� A.2.2���� Concerning listening
����������������� A.2.3���� Concerning telephone or reference connections
������� A.3���� Structure of the theoretical model
����������������� A.3.1���� Definitions concerning loudness, its relationship to sensation level
and loudness ratings
����������������� A.3.2���� Loudness model
������� A.4���� Values of the parameters
����������������� A.4.1���� General
����������������� A.4.2���� Theoretical derivation of G
����� ������������A.4.3���� Determination of values for G
������� A.5���� Calculation of loudness ratings
����������������� A.5.1���� Deviation of formulas and W
weights
Annex B � Fundamental principles of calculation of
sidetone masking
������� B.1���� Calculation from first principles
������� B.2���� Calculation of STMR using W
weights
������� B.3���� Comments on sealed versus unsealed
conditions for the calculation of STMR
������� B.4���� Calculation of LSTR using W weights
Annex C � An alternative form of the loudness rating
algorithmAnnex D � Weighting coefficients for the band 100-8000 Hz
Annex E � Calculation of the listener's sidetone factor
D
������� E.1���� General
������� E.2���� Non-linear microphones and/or
circuitry
������� E.3���� Linear microphones and circuitry
Annex F � Computation of the sidetone sensitivity SmeST
Annex G � Wideband loudness rating algorithm
Appendix I � Bibliography
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