1
Scope
2 References
3 Abbreviations and acronyms
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.3 Structure of the
theoretical model
A.4 Values of the
parameters
A.5 Calculation of
loudness ratings
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 algorithm
Annex 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