1 Scope
2
Normative references
3
Definitions and abbreviations
4
Sending characteristics
4.1 Loudness rating
4.2 Sensitivity/frequency characteristics
4.3 Noise
4.4 Distortion
4.5 Discrimination
against out-of-band input signals
5
Receiving characteristics
5.1 Loudness rating
5.2 Sensitivity/frequency characteristics
5.3 Noise
5.4 Distortion
5.5 Spurious out-of-band receiving signals
6
Sidetone characteristics
6.1 Talker sidetone
6.2 Sidetone distortion
7
Echo path loss characteristics
7.1 Weighted terminal coupling loss
7.2 Stability loss
8
Delay
Annex A – Objective measurement methods for wideband handset
telephones
A.1 Introduction
A.2 Electrical interface specifications
A.2.1 Digital interface
A.2.2 Wideband reference codec specification
A.2.3 Analogue interface
A.2.4 Definition of 0 dBr point
A.3 Electro-acoustic measurement considerations
A.3.1 Artificial mouths and ears
A.3.2 Stimulus signals
A.3.3 Accuracy of calibrations
A.4 Sending measurements
A.4.1 Loudness rating
A.4.2 Sensitivity/frequency response
A.4.3 Noise
A.4.4 Distortion
A.4.5 Discrimination against out-of-band
signals
A.5 Receiving measurements
A.5.1 Loudness rating
A.5.2 Sensitivity/frequency response
A.5.3 Noise
A.5.4 Distortion
A.5.5 Spurious out-of-band receiving signals
A.6 Sidetone measurements
A.6.1 Talker sidetone
A.6.2 Distortion
A.7 Echo path loss measurements
A.7.1 Terminal coupling loss
A.7.2 Stability loss
A.8 Delay measurements