ETSI TS 126 131 V15.2.0 (2019-10)

ETSI TS 126 131 V15.2.0 (2019-10)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Terminal acoustic characteristics for telephony;
Requirements
(3GPP TS 26.131 version 15.2.0 Release 15)

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3GPP TS 26.131 version 15.2.0 Release 15 1 ETSI TS 126 131 V15.2.0 (2019-10)



Reference
RTS/TSGS-0426131vf20
Keywords
LTE,UMTS
ETSI
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© ETSI 2019.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners.
®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI

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3GPP TS 26.131 version 15.2.0 Release 15 2 ETSI TS 126 131 V15.2.0 (2019-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities. These shall be
interpreted as being references to the corresponding ETSI deliverables.
The cross reference between 3GPP and ETSI identities can be found under http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 26.131 version 15.2.0 Release 15 3 ETSI TS 126 131 V15.2.0 (2019-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 7
Introduction . 7
1 Scope . 8
2 References . 8
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 Interfaces . 10
5 Narrowband telephony transmission performance . 11
5.1 Applicability . 11
5.2 Overall loss/loudness ratings . 11
5.2.1 General . 11
5.2.2 Connections with handset UE . 11
5.2.2a Connections with handset UE in the presence of background noise . 11
5.2.3 Connections with desktop and vehicle-mounted hands-free UE. 11
5.2.4 Connections with hand-held hands-free UE . 12
5.2.5 Connections with headset UE . 12
5.2.5a Connections with headset UE in the presence of background noise . 12
5.3 Idle channel noise (handset and headset UE) . 13
5.3.1 Sending . 13
5.3.2 Receiving . 13
5.4 Sensitivity/frequency characteristics . 13
5.4.1 Handset and headset UE sending . 13
5.4.2 Handset and headset UE receiving . 14
5.4.3 Desktop and vehicle-mounted hands-free UE sending . 15
5.4.4 Desktop and vehicle-mounted hands-free UE receiving . 16
5.4.5 Hand-held hands-free UE sending . 17
5.4.6 Hand-held hands-free UE receiving . 18
5.5 Sidetone characteristics (handset and headset UE) . 19
5.5.1 Sidetone loss . 19
5.5.2 Sidetone delay . 19
5.6 Stability loss . 20
5.7 Acoustic echo control . 20
5.7.1 General . 20
5.7.2 Acoustic echo control in desktop and vehicle-mounted hands-free UE . 20
5.7.3 Acoustic echo control in hand-held hands-free UE . 21
5.7.4 Acoustic echo control in a handset UE . 21
5.7.5 Acoustic echo control in a headset UE . 21
5.8 Distortion . 21
5.8.1 Sending distortion . 21
5.8.2 Receiving . 22
5.9 Void . 23
5.10 Information on other parameters (not normative) . 23
5.11 Sending performance in the presence of ambient noise . 23
5.11.1 General . 23
5.11.2 Connections with handset UE . 23
5.11.3 Connections with Handheld hands-free UE . 23
5.12 Delay . 24
5.12.0 UE delay definition . 24
ETSI

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3GPP TS 26.131 version 15.2.0 Release 15 4 ETSI TS 126 131 V15.2.0 (2019-10)
5.12.1 Handset UE . 24
5.12.2 Headset UE . 25
5.12.2.1 Wired headset . 25
5.12.2.2 Wireless headset . 26
5.13 Echo control characteristics . 26
5.13.1 Handset . 27
5.13.2 Headset . 27
5.13.3 Handheld hands-free . 27
5.13.4 Desktop and vehicle mounted hands-free . 27
5.14 Clock accuracy . 27
5.15 Jitter buffer management behaviour . 28
6 Wideband telephony transmission performance . 28
6.1 Applicability . 28
6.2 Overall loss/loudness ratings . 28
6.2.1 General . 28
6.2.2 Connections with handset UE . 28
6.2.2a Connections with handset UE in the presence of background noise . 29
6.2.3 Connections with desktop and vehicle-mounted hands-free UE. 29
6.2.4 Connections with hand-held hands-free UE . 29
6.2.5 Connections with headset UE . 30
6.2.5a Connections with headset UE in the presence of background noise . 30
6.3 Idle channel noise (handset and headset UE) . 30
6.3.1 Sending . 30
6.3.2 Receiving . 30
6.4 Sensitivity/frequency characteristics . 31
6.4.1 Handset and headset UE sending . 31
6.4.2 Handset and headset UE receiving . 31
6.4.3 Desktop and vehicle-mounted hands-free UE sending . 32
6.4.4 Desktop and vehicle-mounted hands-free UE receiving . 33
6.4.5 Hand-held hands-free UE sending . 34
6.4.6 Hand-held hands-free UE receiving . 35
6.5 Sidetone characteristics (handset and headset UE) . 37
6.5.1 Sidetone loss . 37
6.5.2 Sidetone delay . 37
6.6 Stability loss . 37
6.7 Acoustic echo control . 38
6.7.1 General . 38
6.7.2 Acoustic echo control in desktop and vehicle-mounted hands-free UE . 38
6.7.3 Acoustic echo control in hand-held hands-free UE . 38
6.7.4 Acoustic echo control in a handset UE . 38
6.7.5 Acoustic echo control in a headset UE . 39
6.8 Distortion . 39
6.8.1 Sending distortion . 39
6.8.2 Receiving . 40
6.9 Void . 40
6.10 Sending performance in the presence of ambient noise . 41
6.10.1 General . 41
6.10.2 Connections with handset UE . 41
6.10.3 Connections with Handheld hands-free UE . 41
6.11 Delay . 41
6.11.0 UE delay definition . 41
6.11.1 Handset UE . 42
6.11.2 Headset UE . 43
6.11.2.1 Wired headset . 43
6.11.2.2 Wireless headset . 44
6.12 Echo control characteristics . 44
6.12.1 Handset . 45
6.12.2 Headset . 45
6.12.3 Handheld hands-free . 45
6.12.4 Desktop and vehicle mounted hands-free . 45
6.13 Clock accuracy . 45
ETSI

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3GPP TS 26.131 version 15.2.0 Release 15 5 ETSI TS 126 131 V15.2.0 (2019-10)
6.14 Jitter buffer management behaviour . 46
7 Super-wideband telephony transmission performance . 46
7.1 Applicability . 46
7.2 Overall loss/loudness ratings . 46
7.2.1 General . 46
7.2.2 Connections with handset UE . 46
7.2.2a Connections with handset UE in the presence of background noise . 47
7.2.3 Connections with desktop and vehicle-mounted hands-free UE. 47
7.2.4 Connections with hand-held hands-free UE . 47
7.2.5 Connections with headset UE . 48
7.2.5a Connections with headset UE in the presence of background noise . 48
7.3 Idle channel noise (handset and headset UE) . 48
7.3.1 Sending . 48
7.3.2 Receiving . 48
7.4 Sensitivity/frequency characteristics . 49
7.4.0 General . 49
7.4.1 Handset and headset UE sending . 49
7.4.2 Handset and headset UE receiving . 50
7.4.2.1 Handset UE receiving . 50
7.4.2.2 Headset UE receiving . 51
7.4.3 Desktop and vehicle-mounted hands-free UE sending . 52
7.4.4 Desktop and vehicle-mounted hands-free UE receiving . 53
7.4.5 Hand-held hands-free UE sending . 54
7.4.6 Hand-held hands-free UE receiving . 54
7.5 Sidetone characteristics (handset and headset UE) . 55
7.5.1 Sidetone loss . 55
7.5.2 Sidetone delay . 56
7.6 Stability loss . 56
7.7 Acoustic echo control . 56
7.7.1 General . 56
7.7.2 Acoustic echo control in desktop and vehicle-mounted hands-free UE . 56
7.7.3 Acoustic echo control in hand-held hands-free UE . 57
7.7.4 Acoustic echo control in a handset UE . 57
7.7.5 Acoustic echo control in a headset UE . 57
7.8 Distortion . 58
7.8.1 Sending distortion . 58
7.8.2 Receiving . 58
7.9 Void . 59
7.10 Sending performance in the presence of ambient noise . 59
7.10.1 General . 59
7.10.2 Connections with handset UE . 59
7.10.3 Connections with Handheld hands-free UE . 60
7.11 Delay . 60
7.11.0 UE delay definition .
...