Table of Contents
1Scope
2References
3Abbreviationsandacronyms
4Loudnessratingparametersfortelephonesets
5Generalalgorithmforloudnessratingcalculations
6CalculationofSLRandRLR
7CalculationofSTMR
8CalculationofLSTR
AnnexA-Fundamentalprinciplesofloudnessratingcalculations
A.1Introduction
A.2Definitionsandsymbolsconcerningsoundpressures,
sensitivitiesandtransmissionlosses
A.3Structureofthetheoreticalmodel
A.4Valuesoftheparameters
A.5Calculationofloudnessratings
AnnexB-Fundamentalprinciplesofcalculationofsidetone
masking
B.1Calculationfromfirstprinciples
B.2CalculationofSTMRusingWweights
B.3Commentsonsealedversusunsealedconditionsforthe
calculationofSTMR
B.4CalculationofLSTRusingWweights
AnnexC-Analternativeformoftheloudnessratingalgorithm
AnnexD-Weightingcoefficientsfortheband100-8000Hz
AnnexE-Calculationofthelistener'ssidetonefactorD
E.1General
E.2Non-linearmicrophonesand/orcircuitry
E.3Linearmicrophonesandcircuitry
AnnexF-ComputationofthesidetonesensitivityS[meST]
AnnexG-Widebandloudnessratingalgorithm Abstract
Provides the preferred method for calculating loudness ratings mainly in the case of local telephone systems which transmit a band of frequencies not exceeding about 180 - 4500 Hz
