IEEE 269-2019

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IEEE Standard for Measuring Electroacoustic Performance of Communication Devices

Published By	Publication Date	Number of Pages
IEEE	2019	203

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Description

Revision Standard – Active. Practical methods for making electroacoustic laboratory measurements of analog and digital speech communications terminals and connected audio devices are contained in this standard. The methods are applicable to a wide variety of wired, wireless, cordless, and mobile communication terminals. Examples include Voice over Internet Protocol (VoIP), Wi-Fi®, and softphone devices. Tests applicable to connected audio devices such as wired, Bluetooth®, and universal serial bus (USB) handsets, headsets, and wearables are included. The standard contains objective metrics, subjective metrics, and subjective metric predictors. Application is in the frequency range from 20 Hz to 20 kHz.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std 269™-2019 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
8	Introduction
9	Contents
12	Figures
14	Tables
15	1. Overview 1.1 Scope
16	1.2 Purpose 1.3 How to use this standard
18	1.4 Changes since last edition of this standard 1.5 Word usage 2. Normative references
21	3. Definitions, acronyms, and abbreviations 3.1 Definitions
29	3.2 Acronyms and abbreviations
30	4. Symbols 4.1 Letter symbols
31	4.2 Drawing symbols 5. Test equipment, fixtures, and environment 5.1 Measurement microphones
32	5.2 Ear simulators
33	5.3 Mouth simulators 5.4 Test fixture 5.5 Test room
38	6. Codecs, interfaces, and test circuits 6.1 Reference codecs
39	6.2 Interfaces to digital terminals
41	6.3 Interfaces to digital subsystems
43	6.4 Digital impairments 6.5 Test circuits for analog terminals
47	6.6 Test circuits for analog subsystems
49	6.7 Analog impairments 7. Test signals 7.1 Speech test signals
51	7.2 Nonspeech test signals 7.3 Distortion test signals 7.4 Conditioning signals
52	7.5 Impairment signals 7.6 –20 dBm0 reference signal 8. Calibration 8.1 General
53	8.2 Measurement instruments 8.3 Measurement microphones 8.4 Ear simulator
54	8.5 Calibration bandwidth and resolution 8.6 Electrical source
55	8.7 Acoustic source
58	9. Device positioning 9.1 Handset positioning
60	9.2 Headset positioning
62	10. Device control settings
63	10.1 Digital terminals
64	10.2 Digital subsystems
65	10.3 Analog terminals
67	10.4 Analog subsystems
68	11. Test setup 11.1 General 11.2 Test setup diagrams
70	11.3 Analysis parameters
72	11.4 Device operation 11.5 Test conditions
73	12. Measurements 12.1 Combining tests 12.2 Frequency response
76	12.3 Output level
78	12.4 Receive conversational gain
79	12.5 Tonal balance
80	12.6 Receive balance and polarity
81	12.7 Echo
86	12.8 Self-noise
88	12.9 Level-dependent dynamics
91	12.10 Distortion and induced artifacts
94	12.11 Speech quality in a quiet environment 12.12 Speech and noise quality in a noisy environment
95	12.13 Mute leakage
96	12.14 Device delay 12.15 Stability loss
97	12.16 Howling 12.17 Maximum acoustic output
99	12.18 Impedance 13. Measurement data 13.1 Translations from drum reference point (DRP) to listener reference point (LRP)
100	13.2 Band averaging
101	13.3 Presentation of results
102	Annex A (normative) Analysis methods
113	Annex B (informative) Measurement uncertainty and tolerances
115	Annex C (normative) Alternative ear simulators, mouth simulators, and test fixtures
118	Annex D (normative) Nonspeech test signals
124	Annex E (normative) Distortion
140	Annex F (normative) Hoth and other noises
154	Annex G (informative) Loudness ratings (legacy)
157	Annex H (normative) Decibel references and conversions
167	Annex I (normative) Typical network and speech levels
170	Annex J (normative) Speech and noise quality
185	Annex K (informative) Wind noise
192	Annex L(normative) Sidetone echo
193	Annex M (normative) Power and voltage summations
197	Annex N (informative) Listener sidetone frequency response (legacy)
198	Annex O (informative) Conditioning for carbon transmitters (legacy)
199	Annex P (informative) Subjective loudness and spectral balance test procedure
202	Annex Q (informative) Bibliography
203	Back cover