1 Scope
2 References
3 Abbreviations
4 Sending sensitivities of the
LTS
5 Receiving sensitivities of the
LTS
6 Artificial mouth and voice
7 Artificial ear
8 Definition of sending
sensitivity of an LTS
9 Definition of receiving
sensitivity of an LTS
10 Definitions of talker and
listener sidetone sensitivities of an LTS
11 Methods for determining SmJ,
SJe, SmeST, SRNST and DSM
Annex A – Definitions of mouth reference point and ear
reference point
Annex B – The application of complex terminating impedances
when measuring SLR and RLR
B.1 Complex impedance terminations
B.2 Impedance converter
B.3 Differences when
measuring a telephone set with a complex impedance using 600 ohm
terminations
Annex C – Definition of the speaking position for measuring
loudness ratings of handset telephones
C.1 Geometry defining a
speaking position
C.2 Geometry defining a
change in speaking position
C.3 Simplification through
the use of the position of the ear reference point
C.4 Vector representation
of the reference points
Annex D – Definition of handset positions for measuring
loudness ratings and frequency responses using the P.57 type 3.4 artificial ear
on HATS
D.1 General
D.2 Definition of the
standard handset position
D.3 Definition of the flat
handset position
D.4 Definition of the
alternative handset position for measuring loudness ratings and frequency
responses using the P.57 type 3.4 artificial ear on HATS
Annex E – Definition of handset positions for measuring
loudness ratings and frequency responses using the P.57 types 3.2 and 3.3
artificial ear on HATS
E.1 Definition of standard
handset position for measuring loudness ratings and frequency responses using
the P.57 types 3.2 and 3.3 artificial ear on HATS
E.2 Definition of the alternative handset position for measuring
loudness ratings and frequency responses using the P.57 type 3.3 artificial ear
on HATS
Annex F – Correspondence between measurements using the LRGP
and the HATS position
Bibliography