3GPP TS 26.131 V13.0.0 (2015-09)
Technical Specification
3rd Generation Partnership Project;
Technical Specification Group Services and System Aspects;
Terminal acoustic characteristics for telephony;
Requirements
(Release 13)
   
The present document has been developed within the 3rd Generation Partnership Project (3
GPP TM) and may be further elaborated for the purposes of 3GPP.
The present document has not been subject to any approval process by the 3GPP Organizational Partners and shall not be implemented.
This Specification is provided for future development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification.
Specifications and reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organizational Partners' Publications Offices.

Keywords
UMTS, terminal, telephony, acoustic, LTE
3GPP
Postal address
3GPP support office address
650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Internet
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© 2015, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).
All rights reserved.
UMTS™ is a Trade Mark of ETSI registered for the benefit of its members
3GPP™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
LTE™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
GSM® and the GSM logo are registered and owned by the GSM Association
Contents
Foreword
This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number
as follows:
where:
x    the first digit:
1    presented to TSG for information;
2    presented to TSG for approval;
headset3    or greater indicates TSG approved document under change control.
y    the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc.
z    the third digit is incremented when editorial only changes have been incorporated in the document.
Introduction

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