1 Scope
2 References
3 Definitions
4 Abbreviations and acronyms
5 Conventions
6 Test set-up and preparation
6.1 Test arrangement
6.2 Test arrangement in a car
6.3 Positioning of the emergency call IVS
6.4 Operation modes of emergency call IVS
6.5 Artificial mouth
6.6 Artificial ear
6.7 Influence of the transmission system
6.8 Calibration and equalization
6.9 System simulator settings
6.10 Environmental conditions
7 Test signals and test signal levels
7.1 Signals
7.2 Background noise signals
8 Measurement parameters and requirements for narrowband IVS terminals
8.1 Preparation measurements
8.2 Delay
8.3 Loudness ratings
8.4 Variation of RLR in the presence of background noise
8.5 Sensitivity frequency responses
8.6 Speech intelligibility during single talk
8.7 Idle channel noise
8.8 Echo performance
8.9 Switching characteristics
8.10 Double talk performance
8.11 Background noise transmission
9 Measurement parameters and requirements for wideband IVS terminals
9.1 Preparation measurements
9.2 Delay
9.3 Loudness ratings
9.4 Variation of RLR in the presence of background noise
9.5 Sensitivity frequency responses
9.6 Speech intelligibility during single talk
9.7 Idle channel noise
9.8 Echo performance without background noise
9.9 Switching characteristics
9.10 Double talk performance
9.11 Background noise transmission
Annex A – Alternative method for determining the roundtrip delay
Annex B – Microphone related sound field reproduction technique – Multi-point
noise simulation (MPNS) method
B.1 Loudspeaker set-up in the car
B.2 Microphone set-up in the car
B.3 Background noise recordings and reference noise
B.4 Equalization
B.5 Accuracy of the
equalization
Bibliography