�1���� Scope����������
�2���� References
�3���� Definitions�
�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��
�7���� Test arrangement��
������� 7.1���� Test arrangement in a car���������
�8���� Digital interfaces for development, debugging and test��������
������� 8.1���� Interfaces and access points���
������� 8.2���� Test set-up and tests�
�9���� Test signals and test signal levels�����
������� 9.1���� Signals��������������
������� 9.2���� Background noise signals����������
10���� Measurement parameters and requirements for microphones used in
speakerphone hands-free systems����
������ 10.1���� Microphone measurements in anechoic conditions����
������ 10.2���� 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����������
������ 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 without background noise��������������
����� 11.12���� Double talk performance�������
����� 11.13���� 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���� SRW loudness ratings
������ 12.3���� SRW sensitivity frequency responses
������ 12.4���� SRW noise cancellation test in send����
������ 12.5���� SRW speech quality during single talk
13���� Car-to-car communication�
14���� Guidance on subjective testing�������
15���� Corded headsets���
������ 15.1���� Connector type�����������
������ 15.2���� Connector wiring and electrical specifications
������ 15.3���� Headset receive characteristics������������
������ 15.4���� Headset transmit characteristics����������
������ 15.5���� Standard behaviour in the presence of corded headsets����������
16���� Wireless headsets
������ 16.1���� Wireless headset types�����������
������ 16.2���� Test methodology for verification of standard behaviour���������
������ 16.3���� Standard behaviour in the presence of wireless headsets�������
Annex A � Speech quality measurements����
Annex B � Principles of relative approach����
Annex C � Example of a questionnaire for subjective testing����
������� C.1���� Performance rating � overview�������������
������� C.2���� Test categories and rating types�����������
������� C.3���� Speech and background noise quality in send direction��������������
������� C.4���� Speech quality in receive direction (in the car under test)���������
������� C.5���� Echo cancellation performance�������������
������� C.6���� Hands-free system stability tests (car-to-car)�
Annex D � Standard set of user scenarios����
Annex E � System stability with insufficient far end echo loss����
Appendix I � A method to determine the listening speech quality����
������� I.1���� One-way speech quality in send������������
������� I.2���� One-way speech quality in receive�������
Bibliography����