This part of IEC 60268 applies to transducers converting an electrical input signal into a
mechanical or acoustical output signal. However, if the electrical input terminals and the surface
of the radiator are accessible, this document can also apply to passive and active sound
systems such as loudspeakers, headphones, TV-sets, multi-media devices, personal portable
audio devices, automotive sound systems and professional equipment. This document
describes only electrical and mechanical measurements that help assess the transfer behaviour
of the device under test (DUT). This includes operating the DUT in both the small- and largesignal
domains. The influence of the target application's acoustical boundary conditions (e.g.
car interior) can also be considered in the physical evaluation of the sound system. Perception
and cognitive evaluations of the reproduced sound and the impact of perceived sound quality
are outside the scope of this document.
NOTE This document does not apply to microphones and other sensors. Implementation of this document does not
require access to the sound pressures generated in the near or far fields of the radiator. Directivity and other
characteristics describing the electro-acoustical transfer properties are described in IEC 60268-21, which covers
acoustical measurements.The practical application of the measurements for research and development (R&D), endof-
line testing (QC) and evaluation in the final target application (TA) is discussed in Annex A.

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This part of IEC 60268 defines the STI model, test signals, measurement and prediction
methods.
The objective of this document is to provide a comprehensive manual for all types of users of
the STI model in the fields of audio, communications and acoustics.
This document does not provide STI criteria for certification of transmission channels (e.g.
criteria for a voice-alarm system), but some typical application values are provided in Annex G.
Every measurement method has limitations, and the reader is referred to clauses relating to
limitations such as speech privacy, echo and systems using digital voice compression
(vocoders).
This document does not cover the case of fluctuating noise on the STI, although some general
comments on dealing with this complex issue are provided in 7.13 and 8.9.3.

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IEC 61937-2:2021 is available as IEC 61937-2:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61937-2:2021 specifies the digital audio interface to convey non-linear PCM encoded audio bitstreams applying IEC 60958-1 and IEC 60958-3. This document specifies burst-info, which defines content information about the data contained in the burst-payload. IEC 61937-2:2021 cancels and replaces the second edition published in 2007, Amendment 1:2011 and Amendment 2:2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) new audio data-types of MPEG-D USAC, ACX, ACX HBR2, ACX HBR4 and ACX HBR8 have been added;
b) extended data-type field in Pe has been activated.

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IEC 61937-1:2021 is available as IEC 61937-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61937-1:2021 applies to the digital audio interface using the IEC 60958 series for the conveying of non-linear PCM encoded audio bitstreams.
It describes the way in which this digital interface can be used in consumer applications. The professional mode is not considered within the scope of this document.
IEC 61937-1:2021 cancels and replaces the second edition published in 2007, and amendment 1 published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Activation of Pe field;
b) Enhanced usage of channel status bits.
c) Addition of Annex B.

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IEC 60958-5:2021 enhances the consumer application of the interface for the interconnection of digital audio equipment defined in IEC 60958-1 and IEC 60958-3, introducing:
- multichannel;
- multi-stream;
- high-resolution;
- multimedia extension;
- related applications.

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    40 pages
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EN-IEC 60089 applies to analogue audio disk records and the corresponding professional anddomestic reproducing equipment. It excludes amplifiers and loudspeakers, methods ofmeasurement for which can be found in IEC 60268-3, IEC 60268-5, IEC 6026821andIEC 60268-221 .This document specifies the characteristics that are necessary to ensure compatibility betweenanalogue audio disk records and the corresponding reproducing equipment.It also lists and defines the most important characteristics affecting the performance ofreproducing equipment, and establishes agreed methods of measurement for thesecharacteristics

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IEC 60098:2020 applies to analogue audio disk records and the corresponding professional and domestic reproducing equipment. It excludes amplifiers and loudspeakers, methods of measurement for which can be found in IEC 60268-3, IEC 60268-5, IEC 60268­21 and IEC 60268-22. IEC 60098:2020 specifies the characteristics that are necessary to ensure compatibility between analogue audio disk records and the corresponding reproducing equipment. It also lists and defines the most important characteristics affecting the performance of reproducing equipment, and establishes agreed methods of measurement for these characteristics. IEC 60098:2020 cancels and replaces the third edition published in 1987. This edition constitutes a full revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of a tolerance on groove width.

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IEC 62942:2019 specifies a file format for interchanging audio data between compliant equipment. It is primarily intended for audio applications in professional recording, production, post-production, and archiving. It is derived from the AES31-2 [2] but is also compatible with variant specifications including EBU Tech 3285 [3] to [10], ITU-R BR.1352-3-2007 [11] to [14], and the Japan Post Production Association's BWF-J [15]. This document contains the specification of the broadcast audio extension chunk and its use with PCM-coded audio data. Basic information on the RIFF format and how it can be extended to other types of audio data is given in Annex E. Details of the PCM WAVE format are also given in Annex A. An optional extended format, BWF-E, supports 64-bit addressing to permit file sizes greater than 4 GB.

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IEC 62574:2020 is available as IEC 62574:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62574:2020 specifies the general channel assignment and the metadata for multichannel audio format. This document, with its channel mapping and labelling content, provides the unified usage of channel assignments for source devices, digital audio interfaces and sink devices. The general channel assignment excludes the specification of the exact position of each loudspeaker. The metadata has the exact position of each loudspeaker; however, since the position of the loudspeaker is different in various surround sound formats, the position information of the metadata is not standardized. It is aimed at consumer applications; it is not targeted at theatrical environments. Up to 65 labels for loudspeaker positions and 15 labels for loudspeakers on the display are specified, which can be used for all current multichannel audio formats. The channel assignment concept is room centric and listener centric. This general channel assignment specifies the position of the loudspeaker as seen from the listener.
IEC 62574:2020 cancels and replaces the first edition published in 2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) model of channel assignment spaces is changed;
b) definition of channel maps and labels is changed;
c) metadata is newly specified;
d) channel maps and labels from the first edition are included in Annex A.

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IEC 60098:2020 applies to analogue audio disk records and the corresponding professional and domestic reproducing equipment. It excludes amplifiers and loudspeakers, methods of measurement for which can be found in IEC 60268-3, IEC 60268-5, IEC 60268­21 and IEC 60268-22.
IEC 60098:2020 specifies the characteristics that are necessary to ensure compatibility between analogue audio disk records and the corresponding reproducing equipment.
It also lists and defines the most important characteristics affecting the performance of reproducing equipment, and establishes agreed methods of measurement for these characteristics.
IEC 60098:2020 cancels and replaces the third edition published in 1987. This edition constitutes a full revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of a tolerance on groove width.

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    71 pages
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IEC 62942:2019 specifies a file format for interchanging audio data between compliant equipment. It is primarily intended for audio applications in professional recording, production, post-production, and archiving.
It is derived from the AES31-2 [2] but is also compatible with variant specifications including EBU Tech 3285 [3] to [10], ITU-R BR.1352-3-2007 [11] to [14], and the Japan Post Production Association's BWF-J [15].
This document contains the specification of the broadcast audio extension chunk and its use with PCM-coded audio data. Basic information on the RIFF format and how it can be extended to other types of audio data is given in Annex E. Details of the PCM WAVE format are also given in Annex A.
An optional extended format, BWF-E, supports 64-bit addressing to permit file sizes greater than 4 GB.

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  • Standard
    86 pages
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This International Standard specifies the audio reproduction method for normalized loudness
level of audio sources for consumer equipment and systems.

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  • Amendment
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This International Standard specifies the audio reproduction method for normalized loudness
level of audio sources for consumer equipment and systems.

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  • Amendment
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IEC 62271-102:2018 applies to alternating current disconnectors and earthing switches, designed for indoor and outdoor installations for nominal voltages above 1 000 V and for service frequencies up to and including 60 Hz.
This second edition cancels and replaces the first edition published in 2001, Amendment 1:2011 and Amendment 2:2013. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:  
new numbering according to IEC 17/1025/RQ to harmonize with ISO/IEC Directives, Part 2, and IEEE Std. C37.100.1;
clause numbering has been aligned with IEC 62271-1:2017;
the Scope has been extended to cover all indoor and outdoor installations. Consideration of switching devices having disconnecting and/or earthing switch functionalities, apart from other functions, are also covered by this document;
ratings have been moved from Annexes B, C and E to Clause 5; the order of the subclauses now corresponds to the order of subclauses in Clause 7;
new rating values for bus-transfer current and bus-transfer voltage have been assigned;
new class of mechanical endurance for earthing switches has been added (M1);
subclause "Rated values of electrical endurance for earthing switches" is now called "Classification of earthing switches for short-circuit making capability";
new subclause with ratings for ice-coating has been added;
new subclause with classification of bus-charging switching capability has been added;
new withstand requirements for interlocking devices have been added;
the way to comply with the requirements of the isolating distance of disconnectors has been modified;
design and construction requirements for position-indicating devices have been modified, aligning the requirements for position indication and signalling;
the value of the operating force has been changed;
the test procedures and validation criteria have been revised and modified where necessary;
requirements for applied voltage during single-phase test on non-simultaneous closing earthing switches have been changed;
non-verifiable requirements have been deleted;
a new subclause has been added for testing mechanical interlocking devices;
the high- and low-temperature test is mandatory if the temperature limits for the service conditions of the apparatus (defined by the manufacturer) are above +40 °C or below −5 °C, and a more detailed testing procedure is given;
the testing procedure to verify the proper functioning of the position-indicating device allows a more practicable testing for every technology used;
a new Annex B has been added with title: "Current-switching capability required of disconnectors and earthing switches";
a new Annex C has been added with title: "Tolerances on test quantities for type tests";
a new Annex E has been added with title: "Extension of validity of type tests".

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Specifies the functions and performance characteristics of measuring assemblies and the methods of test to be used to determine compliance with the requirements of this standard.

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This International Standard specifies a hardware and software specification which makes it
possible to exchange symbolic music and control information between different musical
instruments or other devices such as sequencers, computers, lighting controllers, mixers, etc.
using MIDI technology (musical instrument digital interface).

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IEC 62576:2018 is also available as IEC 62576:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62576:2018 describes the methods for testing electrical characteristics of electric double-layer capacitor cells (hereinafter referred to as capacitor) to be used for peak power assistance in hybrid electric vehicles. This second edition cancels and replaces the first edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) information on applicability of this document has been added in Clause 1;
b) the definitions of some terms in Clause 3 have been improved;
c) the description of test procedures in Clause 4 has been clarified;
d) information on endurance cycling test has been added (Annex E).

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This European Standard specifies the performance requirements for sound systems which are
primarily intended to broadcast information for the protection of lives within one or more specified
areas in an emergency. It also gives the characteristics and the methods of test necessary for the
specification of the system.
This European Standard applies to sound reinforcement and distribution systems to be used to effect
a rapid and orderly mobilization of occupants in an indoor or outdoor area in an emergency, including
systems using loudspeakers to broadcast voice announcements for emergency purposes and
attention-drawing or alarm tone signals.
This European Standard does not apply to emergency sound systems used for evacuation in case of
fire emergency, whether connected to a fire detection and fire alarm system or not.
NOTE 1 The use of the system for normal sound reinforcement and distribution systems purposes under nonhazardous
circumstances is not excluded.
It is recommended that the system, when used for emergency purposes, should form part of a
complete facility (equipment, operating procedures and training programmes) for the control of
emergencies.
NOTE 2 Sound systems for emergency purposes may be the subject of approval by relevant authorities.

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IEC 62702-1-2:2017(E) specifies a method of data-quality assurance for writable disks which are specified for long-term data storage, and a data migration method, which can sustain the recorded data on disks for long-term audio data preservation. The writable disks include Blu-ray Disk (BD) Recordable disk and BD Rewritable disk.
This document specifies the physical and logical aspects for a standard of audio archives of various storage types which are typically used for audio archives in markets.
The IEC 62702 series consists of:
- IEC 62702-1, which specifies the minimum requirements on physical aspects of optical disks for digital sound recordings; IEC 62702-1-1 specifies requirements for DVD optical disks, IEC 62702-1-2 specifies requirements for BD optical disks.
- IEC 62702-2, which specifies the minimum requirements for digitization of content, format of digitized content, content information and media inspection.

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IEC 63035:2017(E) specifies a hardware and software specification which makes it possible to exchange symbolic music and control information between different musical instruments or other devices such as sequencers, computers, lighting controllers, mixers, etc. using MIDI technology (musical instrument digital interface).

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IEC 61937-9:2017(E) describes the method to convey non-linear PCM bitstreams encoded according to the MAT format.
This second edition cancels and replaces the first edition published in 2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition: addition of new frame rates.

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IEC 61937-14:2017(E) describes the method to convey non-linear PCM bit streams encoded according to the AC-4 format.

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IEC 61937-3:2017 is available as IEC 61937-3:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61937-3:2017 describes the method used to convey non-linear PCM bitstreams encoded according to the AC-3 and enhanced AC-3 formats. This third edition of IEC 61937-3 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) removal of support for enhanced AC-3 bitstreams with a sampling frequency of 32 kHz;
b) updates to normative and informative references;
c) clarification of pause data-burst usage for enhanced AC-3 bitstreams.

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IEC 61937-10:2017(E) specifies the method for IEC 60958 to convey non-linear PCM bitstreams encoded in accordance with the MPEG-4 audio lossless coding (ALS) format.
This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Addition of Levels 2, 3, 4 of MPEG-4 ALS Simple Profile;
b) Addition of data-type bits 0-4 and data-type bits 5-6 for MPEG-4 ALS with LATM/LOAS header.

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    17 pages
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IEC 63035:2017 specifies a hardware and software specification which makes it possible to exchange symbolic music and control information between different musical instruments or other devices such as sequencers, computers, lighting controllers, mixers, etc. using MIDI technology (musical instrument digital interface):

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IEC 60317-69:2017 specifies the requirements of enamelled rectangular aluminium winding wire of class 220 with a dual coating. The underlying coating is based on polyester or polyesterimide resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The superimposed coating is based on polyamide-imide resin. The range of nominal conductor dimensions covered by this standard is:
MinimumMaximum
Width2,0 mm16,0 mm
Thickness0,80 mm5,60 mm
Wires of grade 1 and grade 2 are included in this part of IEC 60317 and apply to the complete range of conductors. The specified combinations of width and thickness as well as the specific ratio width/thickness are given in IEC 60317.
This publication is to be read in conjunction with IEC 60317-0-9:2015.

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Specifies the method for the digital audio interface specified in EN 60958 to convey non-linear PCM bitstreams encoded in accordance with the ATRAC, ATRAC2/3 and ATRAC-X formats.

  • Amendment
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This part of IEC 60958 specifies the format for coding audio used for the audio content.
Together with IEC 60958-1, IEC 60958-4-2, and IEC 60958-4-4, it specifies an interface for
serial digital transmission of two channels of periodically sampled and linearly represented
digital audio data from one transmitter to one receiver.
It is expected that the audio data will have been sampled at any of the sampling frequencies
recognized by AES5. The capability of the interface to indicate other sample rates does not
imply that it is recommended that equipment support these rates. To eliminate doubt,
equipment specifications should define supported sampling frequencies.

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This part of IEC 60958 specifies the format for coding metadata, or subcode, that relates to
the audio content and is carried with it. This part of IEC 60958, together with IEC 60958-1,
IEC 60958-4-1, and IEC 60958-4-4, specifies an interface for serial digital transmission of two
channels of periodically sampled and linearly represented digital audio data from one
transmitter to one receiver.

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This part of IEC 60958 specifies the physical and electrical parameters for different media.
This part together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-2 specify an interface
for the serial digital transmission of two channels of periodically sampled and linearly
represented digital audio data from one transmitter to one receiver.
The transport format defined in IEC 60958-1 is intended for use with shielded twisted-pair
cable of conventional design over distances of up to 100 m without transmission equalization
or any special equalization at the receiver and at frame rates of up to 50 kHz. Longer cable
lengths and higher frame rates may be used, but with a rapidly increasing requirement for
care in cable selection and possible receiver equalization or the use of active repeaters, or
both. Provision is made in this standard for adapting the balanced terminals to use 75 Ω
coaxial cable, and transmission by fibre-optic cable is under consideration. This standard
does not cover connection to any common carrier equipment. In this interface specification,
an interface for consumer use is also mentioned. The two interfaces are not identical.

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IEC 62548:2016 sets out design requirements for photovoltaic (PV) arrays including DC array wiring, electrical protection devices, switching and earthing provisions. The scope includes all parts of the PV array up to but not including energy storage devices, power conversion equipment or loads. An exception is that provisions relating to power conversion equipment are covered only where DC safety issues are involved. The interconnection of small DC conditioning units intended for connection to PV modules are also included. The object of this document is to address the design safety requirements arising from the particular characteristics of photovoltaic systems. Direct current systems, and PV arrays in particular, pose some hazards in addition to those derived from conventional AC power systems, including the ability to produce and sustain electrical arcs with currents that are not greater than normal operating currents.

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This part of IEC 62702 specifies a method of data-quality assurance for writable DVD disks
(hereinafter disks) which are specified for long term data storage, and a data migration
method which can sustain the recorded data on disks for long term audio data preservation.
The writable disks include recordable disks such as DVD-R, and +R format, and rewritable
disks such as DVD-RW, +RW format and DVD-RAM.

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This International Standard specifies the audio reproduction method for normalized loudness
level of audio sources for consumer equipment and systems.

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IEC 60958-4-4:2016 specifies the physical and electrical parameters for different media. This part together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-2 specify an interface for the serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-1 and IEC 60958-4-2, cancels and replaces the IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008: - support for a wider range of physical media; - support for a wider range of audio sampling frequencies; - deprecation of "minimum implementation" of channel status data.

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IEC 60958-4-1:2016 specifies the format for coding audio used for the audio content. Together with IEC 60958-1, IEC 60958-4-2, and IEC 60958-4-4, it specifies an interface for serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-2 and IEC 60958-4-4, cancels and replaces IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958 4:2003 with its Amendment 1:2008: - support for a wider range of physical media; - support for a wider range of audio sampling frequencies; - deprecation of "minimum implementation" of channel status data.

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IEC 60958-4-2:2016 specifies the format for coding metadata, or subcode, that relates to the audio content and is carried with it. This part of IEC 60958, together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-4, specifies an interface for serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-1 and IEC 60958-4-4, cancels and replaces IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008: - support for a wider range of physical media; - support for a wider range of audio sampling frequencies; - deprecation of "minimum implementation" of channel status data.

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IEC 62702-1-1:2016 specifies a method of data-quality assurance for writable DVD disks (hereinafter disks) which are specified for long term data storage, and a data migration method which can sustain the recorded data on disks for long term audio data preservation. The writable disks include recordable disks such as DVD-R, and R format, and rewritable disks such as DVD-RW, RW format and DVD-RAM.

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IEC 62760:2016 specifies the audio reproduction method for normalized loudness level of audio sources for consumer equipment and systems.

  • Standard
    27 pages
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IEC 62702-1-1:2016 specifies a method of data-quality assurance for writable DVD disks (hereinafter disks) which are specified for long term data storage, and a data migration method which can sustain the recorded data on disks for long term audio data preservation. The writable disks include recordable disks such as DVD-R, and R format, and rewritable disks such as DVD-RW, RW format and DVD-RAM.
The contents of the corrigendum of February 2018 have been included in this copy.

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IEC TS 62702-2:2016(E) specifies the requirements for digitization of audio data for audio preservation.

  • Technical specification
    17 pages
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IEC 60958-4-1:2016 specifies the format for coding audio used for the audio content. Together with IEC 60958-1, IEC 60958-4-2, and IEC 60958-4-4, it specifies an interface for serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-2 and IEC 60958-4-4, cancels and replaces IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008:
- support for a wider range of physical media;
- support for a wider range of audio sampling frequencies;
- deprecation of "minimum implementation" of channel status data.

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    20 pages
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IEC 60958-4-4:2016 specifies the physical and electrical parameters for different media. This part together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-2 specify an interface for the serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-1 and IEC 60958-4-2, cancels and replaces the IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008:
- support for a wider range of physical media;
- support for a wider range of audio sampling frequencies;
- deprecation of "minimum implementation" of channel status data.

  • Standard
    44 pages
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IEC 60958-4-2:2016 specifies the format for coding metadata, or subcode, that relates to the audio content and is carried with it. This part of IEC 60958, together with IEC 60958-1, IEC 60958-4-1, and IEC 60958-4-4, specifies an interface for serial digital transmission of two channels of periodically sampled and linearly represented digital audio data from one transmitter to one receiver. This first edition, together with IEC 60958-4-1 and IEC 60958-4-4, cancels and replaces IEC 60958-4 published in 2003 and its Amendment 1:2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60958-4:2003 with its Amendment 1:2008:
- support for a wider range of physical media;
- support for a wider range of audio sampling frequencies;
- deprecation of "minimum implementation" of channel status data.

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    47 pages
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IEC 62760:2016 specifies the audio reproduction method for normalized loudness level of audio sources for consumer equipment and systems.

  • Standard
    48 pages
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This part of IEC 62087 specifies the determination of the power consumption of audio
equipment for consumer use.
The various modes of operation which are relevant for measuring power consumption are
defined.
This standard is limited to audio equipment which can be connected to the mains. Audio
equipment that includes a non-removable, main battery is not covered by this standard. Audio
equipment may include any number of auxiliary batteries.
The measuring conditions in this standard represent the normal use of the equipment and
may differ from other specific conditions, for example as specified in safety standards.

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