�1���
�Scope�
�2��� �References�
�3��� �Definitions��
�4��� �Abbreviations and acronyms��������
�5��� �Conventions�����
�6��� �How to use this Recommendation
�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��� �Idle channel noise�
����� �11.7��� �Out-of-band signals����������
����� �11.8��� �Distortion in sending����������
����� �11.9��� �Distortion in
receiving��������
���� �11.10��� �Echo performance
without background noise��������
���� �11.11��� �Double talk
performance��
���� �11.12��� �Background noise transmission�����
12��� �Verification of the
transmission performance of short-range wireless 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 sending������
����� �12.5��� �SRW speech quality
during single talk�������
13��� �Car-to-car
communication����������
����� �13.1��� �Guidance on subjective
testing�������
����� �13.2��� �Test environment and equipment���
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 sending direction��
������ �C.4��� �Speech quality in
receiving direction (in the car under test)��
������ �C.5��� �Echo cancellation
performance������
������ �C.6��� �Hands-free system
stability tests (car-to-car)���������
Appendix I � A method to determine the listening speech
quality��� �
������ �I.1��� ��� One-way speech
quality in sending�����������
������ �I.2��� ��� One-way speech
quality in receiving���������
Bibliography��� �