Table of Contents - P.1100 (10/2025) - Narrowband hands-free communication in motor vehicles

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
5	Conventions
6	How to use this Recommendation
	6.1	Determining compliance with this Recommendation
	6.2	Testing at different stages of the development cycle
	6.3	Application of this Recommendation to acoustic zoning concepts
7	Test set-up and preparation
	7.1	Test arrangement
	7.2	Background noise simulation
	7.3	Positioning of the hands-free terminal and test equipment
	7.4	Artificial mouth
	7.5	Artificial ear
	7.6	Influence of the transmission system
	7.7	Calibration and equalization
	7.8	System simulator settings
	7.9	Environmental conditions
	7.10	Test environment for microphone measurements
8	Digital test interfaces
9	Test signals and test signal levels
	9.1	Signals
	9.2	Background noise signals
	9.3	Short speech test signal
10	Measurement parameters and requirements for microphones used in speakerphone hands-free systems
	10.1	Overview
	10.2	Microphone measurements in anechoic conditions
	10.3	Microphone measurements in the car
11	Measurement parameters and requirements for hands-free terminals
	11.1	Preparation measurements
	11.2	Delay
	11.3	Loudness ratings
	11.4	Sensitivity frequency responses
	11.5	Speech quality during single talk
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	11.6	Listening speech quality stability
	11.7	Idle channel noise
	11.8	Out-of-band signals
	11.9	Distortion in send
	11.10	Distortion in receive
	11.11	Echo performance
	11.12	Switching characteristics
	11.13	Double-talk performance
	11.14	Background noise transmission
12	Verification of the transmission performance of short-range wireless (SRW) transmission enabled phones
	12.1	Interface definition and calibration
	12.2	Delay
	12.3	Loudness ratings
	12.4	Sensitivity frequency responses
	12.5	Noise cancellation test in send
	12.6	Speech quality during single talk
Annex A – Speech quality measurements
Annex B – Principles of Relative Approach
Annex C – Standard set of user scenarios
Annex D – Digital interfaces for development, debugging and testing
	D.1	Overview
	D.2	Interfaces and access points
	D.3	Test set-up and tests
Appendix I – A method to determine the listening speech quality
I.1
I.2
Appendix II – Reporting template for chapter clause 12 testing
Appendix III – Guidance on subjective testing
	III.1	Introduction
	III.2	Test scenarios
	III.3	Test environment and equipment
	III.4	Background noise and driving situations
	III.5	Test documentation
	III.6	Notes on performance rating
	III.7	Example of a questionnaire for subjective testing
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Appendix IV – System stability with insufficient far-end echo loss
Bibliography