EN IEC 62368-1:2020/A11:2020

SLOVENSKI STANDARD
SIST EN IEC 62368-1:2019/A11:2020
01-julij-2020
Oprema za avdio/video, informacijsko in komunikacijsko tehnologijo - 1. del:
Varnostne zahteve
Audio/video, information and communication technology equipment - Part 1: Safety
requirements
Einrichtungen für Audio/Video-, Informations- und Kommunikationstechnik - Teil 1:
Sicherheitsanforderungen
Equipements des technologies de l'audio/vidéo, de l'information et de la communication -
Partie 1 : Exigences de sécurité.
Ta slovenski standard je istoveten z: EN IEC 62368-1:2020/A11:2020
ICS:
33.160.01 Avdio, video in avdiovizualni Audio, video and audiovisual
sistemi na splošno systems in general
35.020 Informacijska tehnika in Information technology (IT) in
tehnologija na splošno general
SIST EN IEC 62368-1:2019/A11:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN IEC 62368-1:2019/A11:2020

SIST EN IEC 62368-1:2019/A11:2020

EUROPEAN STANDARD EN IEC 62368-1:2020/A11

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020
ICS 35.020; 33.160.01
English Version
Audio/video, information and communication technology
equipment - Part 1: Safety requirements
Equipements des technologies de l'audio/vidéo, de Einrichtungen für Audio/Video-, Informations- und
l'information et de la communication - Partie 1 : Exigences Kommunikationstechnik - Teil 1: Sicherheitsanforderungen
de sécurité.
This amendment A11 modifies the European Standard EN IEC 62368-1:2020; it was approved by CENELEC on 2020-01-06. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62368-1:2020/A11:2020 E

SIST EN IEC 62368-1:2019/A11:2020
European foreword
This document (EN IEC 62368-1:2020/A11:2020) has been prepared by CLC/TC 108X "Safety
of electronic equipment within the fields of Audio/Video, Information Technology and
Communication Technology".
This document amends EN IEC 62368-1:2020.
The following dates are fixed:
• latest date by which this document has to (dop) 2021-01-06
be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2023-01-06
standards conflicting with this document
have to be withdrawn
Clauses, subclauses, notes, tables, figures and annexes which are additional to those in
IEC 62368-1:2018 are prefixed “Z”.
SIST EN IEC 62368-1:2019/A11:2020
1 Modification to Clause 3
Replace 3.3.19 of IEC 62368-1 with the following definitions:
3.3.19 Sound exposure
3.3.19.1
momentary exposure level, MEL
metric for estimating 1 s sound exposure level from the HD 483-1 S2 test signal applied to both
channels, based on EN 50332-1:2013, 4.2.
Note 1 to entry: MEL is measured as A-weighted levels in dB.
Note 2 to entry: See B.3 of EN 50332-3:2017 for additional information.
3.3.19.2
calculated sound dose, CSD
one week rolling estimate of sound exposure expressed in percent of the maximum regarded as
safe
Note 1 to entry: See B.4 of EN 50332-3:2017 for additional information.
3.3.19.3
sound exposure, E
A-weighted sound pressure (p) squared and integrated over a stated period of time, T
Note 1 to entry: The SI unit is Pa s.

3.3.19.4
sound exposure level, SEL
, typically the 1 kHz
logarithmic measure of sound exposure relative to a reference value, E0
threshold of hearing in humans.
Note 1 to entry: SEL is measured as A-weighted levels in dB.
dB
Note 2 to entry: See B.4 of EN 50332-3:2017 for additional information.
3.3.19.5
digital signal level relative to full scale, dBFS
levels reported in dBFS are always r.m.s. full scale levels; 0 dBFS, is the level of a dc-free
997 Hz sine wave whose undithered positive peak value is positive digital full scale, leaving the
code corresponding to negative digital full scale unused
Note 1 to entry: It is invalid to use dBFS for non-r.m.s. levels. Because the definition of full scale is based on a sine
wave, the level of signals with a crest factor lower than that of a sine wave may exceed 0 dBFS. In particular, square-
wave signals may reach +3,01 dBFS.

SIST EN IEC 62368-1:2019/A11:2020
2 Modification to Clause 10
Replace 10.6 of IEC 62368-1 with the following:
10.6 Safeguards against acoustic energy sources
10.6.1 General
10.6.1.1 Introduction
Safeguard requirements for protection against long-term exposure to excessive sound pressure
levels from personal music players closely coupled to the ear are specified below. Requirements
for earphones and headphones intended for use with personal music players are also covered.
A personal music player is a portable equipment intended for use by an ordinary person, that:
– is designed to allow the user to listen to audio or audiovisual content / material; and
– uses a listening device, such as headphones or earphones that can be worn in or on or
around the ears; and
– has a player that can be body worn (of a size suitable to be carried in a clothing pocket) and
is intended for the user to walk around with while in continuous use (for example, on a street,
in a subway, at an airport, etc.).
EXAMPLES Portable CD players, MP3 audio players, mobile phones with MP3 type features, PDAs or similar
equipment.
Personal music players shall comply with the requirements of either 10.6.2 or 10.6.3.
NOTE 1 Protection against acoustic energy sources from telecom applications is referenced to ITU-T P.360.
NOTE 2 It is the intention of the Committee to allow the alternative methods for now, but to only use the dose
measurement method as given in 10.6.5 in future. Therefore, manufacturers are encouraged to implement 10.6.5 as
soon as possible.
Listening devices sold separately shall comply with the requirements of 10.6.6.
These requirements are valid for music or video mode only.
The requirements do not apply to:
– professional equipment;
NOTE 3 Professional equipment is equipment sold through special sales channels. All products sold through
normal electronics stores are considered not to be professional equipment.
– hearing aid equipment and other devices for assistive listening;
– the following type of analogue personal music players:
• long distance radio receiver (for example, a multiband radio receiver or world band radio
receiver, an AM radio receiver), and
• cassette player/recorder;
NOTE 4 This exemption has been allowed because this technology is falling out of use and it is expected that
within a few years it will no longer exist. This exemption will not be extended to other technologies.
– a player while connected to an external amplifier that does not allow the user to walk around
while in use.
For equipment that is clearly designed or intended primarily for use by children, the limits of the
relevant toy standards may apply.
The relevant requirements are given in EN 71-1:2011, 4.20 and the related tests methods and
measurement distances apply.
SIST EN IEC 62368-1:2019/A11:2020
10.6.1.2 Non-ionizing radiation from radio frequencies in the range 0 to 300 GHz

The amount of non-ionizing radiation is regulated by European Council Recommendation 1999/519/EC of
12 July 1999 on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300
GHz).
For intentional radiators, ICNIRP guidelines should be taken into account for Limiting Exposure to Time-
Varying Electric, Magnetic, and Electromagnetic Fields (up to 300 GHz). For hand-held and body-
mounted devices, attention is drawn to EN 50360 and EN 50566.

10.6.2 Classification of devices without the capacity to estimate sound dose
10.6.2.1 General
This standard is transitioning from short-term based (30 s) requirements to long-term based
(40 h) requirements. These clauses remain in effect only for devices that do not comply with
sound dose estimation as stipulated in EN 50332-3.
For classifying the acoustic output L , , measurements are based on the A-weighted equivalent
T
Aeq
sound pressure level over a 30 s period.
For music where the average sound pressure (long term L , ) measured over the duration of
T
Aeq
the song is lower than the average produced by the programme simulation noise, measurements
may be done over the duration of the complete song. In this case, T becomes the duration of the
song.
NOTE Classical music, acoustic music and broadcast typically has an average sound pressure (long term L , )
T
Aeq
which is much lower than the average programme simulation noise. Therefore, if the player is capable to analyse the
content and compare it with the programme simulation noise, the warning does not need to be given as long as the
average sound pressure of the song does not exceed the required limit.
For example, if the player is set with the programme simulation noise to 85 dB, but the average music level of the song
is only 65 dB, there is no need to give a warning or ask an acknowledgement as long as the average sound level of the
song is not above the basic limit of 85 dB.
10.6.2.2 RS1 limits (to be superseded, see 10.6.3.2)
RS1 is a class 1 acoustic energy source that does not exceed the following:
– for equipment provided as a package (player with its listening device), and with a proprietary
connector between the player and its listening device, or where the combination of player and
listening device is known by other means such as setting or automatic detection, the L ,
T
Aeq
acoustic output shall be ≤ 85 dB when playing the fixed “programme simulation noise”
described in EN 50332-1.
– for equipment provided with a standardized connector (for example, a 3,5 phone jack) that
allows connection to a listening device for general use, the unweighted r.m.s. output voltage
shall be ≤ 27 mV (analogue interface) or -25 dBFS (digital interface) when playing the fixed
“programme simulation noise” described in EN 50332-1.
– The RS1 limits will be updated for all devices as per 10.6.3.2.
10.6.2.3 RS2 limits (to be superseded, see 10.6.3.3)
RS2 is a class 2 acoustic energy source that does not exceed the following:
– for equipment provided as a package (player with its listening device), and with a proprietary
connector between the player and its listening device, or when the combination of player and
SIST EN IEC 62368-1:2019/A11:2020
listening device is known by other means such as setting or automatic detection, the L ,
T
Aeq
acoustic output shall be ≤ 100 dB(A) when playing the fixed “programme simulation noise” as
described in EN 50332-1.
– for equipment provided with a standardized connector (for example, a 3,5 phone jack) that
allows connection to a listening device for general use, the unweighted r.m.s. output voltage
shall be ≤ 150 mV (analogue interface) or -10 dBFS (digital interface) when playing the fixed
“programme simulation noise” as described in EN 50332-1.
10.6.2.4 RS3 limits
RS3 is a class 3 acoustic energy source that exceeds RS2 limits.
10.6.3 Classification of devices (new)
10.6.3.1 General
Previous limits (10.6.2) created abundant false negative and false positive PMP sound level
warnings. New limits, compliant with The Commission Decision of 23 June 2009, are given
below.
10.6.3.2 RS1 limits (new)
RS1 is a class 1 acoustic energy source that does not exceed the following:
– for equipment provided as a package (player with its listening device), and with a proprietary
connector between the player and its listening device, or where the combination of player and
listening device is known by other means such as setting or automatic detection, the L ,
T
Aeq
acoustic output shall be ≤ 80 dB when playing the fixed “programme simulation noise”
described in EN 50332-1.
– for equipment provided with a standardized connector (for example, a 3,5 phone jack) that
allows connection to a listening device for general use, the unweighted r.m.s. output voltage
shall be ≤ 15 mV (analogue interface) or -30 dBFS (digital interface) when playing the fixed
“programme simulation noise” described in EN 50332-1.
10.6.3.3 RS2 limits (new)
RS2 is a class 2 acoustic energy source that does not exceed the following:
– for equipment provided as a package (player with its listening device), and with a proprietary
connector between the player and its listening device, or where the combination of player and
listening device is known by other means such as setting or automatic detection, the weekly
sound exposure level, as described in EN 50332-3, shall be ≤ 80 dB when playing the fixed
"programme simulation noise" described in EN 50332-1.
– for equipment provided with a standardized connector (for example, a 3,5 phone jack) that
allows connection to a listening device for general use, the unweighted r.m.s. output level,
integrated over one week, as described in EN 50332-3, shall be ≤ 15 mV (analogue interface)
or -30 dBFS (digital interface) when playing the fixed “programme simulation noise” described
in EN 50332-1.
10.6.4 Requirements for maximum sound exposure
10.6.4.1 Measurement methods
All volume controls shall be turned to maximum during tests.
Measurements shall be made in accordance with EN 50332-1 or EN 50332-2 as applicable.
SIST EN IEC 62368-1:2019/A11:2020
10.6.4.2 Protection of persons
Except as given below, protection requirements for parts accessible to ordinary persons,
instructed persons and skilled persons are given in 4.3.
NOTE 1 Volume control is not considered a safeguard.
Between RS2 and an ordinary person, the basic safeguard may be replaced by an
instructional safeguard in accordance with Clause F.5, except that the instructional
safeguard shall be placed on the equipment, or on the packaging, or in the instruction manual.
Alternatively, the instructional safeguard may be given through the equipment display during
use.
The elements of the instructional safeguard shall be as follows:
– element 1a: the symbol , IEC 60417-6044 (2011-01)
– element 2: “High sound pressure” or equivalent wording
– element 3: “Hearing damage risk” or equivalent wording
– element 4: “Do not listen at high volume levels for long periods.” or equivalent wording
An equipment safeguard shall prevent exposure of an ordinary person to an RS2 source
without intentional physical action from the ordinary person and shall automatically return to an
output level not exceeding what is specified for an RS1 source when the power is switched off.
The equipment shall provide a means to actively inform the user of the increased sound level
when the equipment is operated with an output exceeding RS1. Any means used shall be
acknowledged by the user before activating a mode of operation which allows for an output
exceeding RS1. The acknowledgement does not need to be repeated more than once every 20 h
of cumulative listening time.
NOTE 2 Examples of means include visual or audible signals. Action from the user is always needed.
NOTE 3 The 20 h listening time is the accumulative listening time, independent of how often and how long the
personal music player has been switched off.
A skilled person shall not be unintentionally exposed to RS3.
10.6.5 Requirements for dose-based systems
10.6.5.1 General requirements
Personal music players shall give the warnings as provided below when tested according to
EN 50332-3, using the limits from this clause.
The manufacturer may offer optional settings to allow the users to modify when and how they
wish to receive the notifications and warnings to promote a better user experience without
defeating the safeguards. This allows the users to be informed in a method that best meets their
physical capabilities and device usage needs. If such optional settings are offered, an
administrator (for example, parental restrictions, business/educational administrators, etc.) shall
be able to lock any optional settings into a specific configuration.
The personal music player shall be supplied with easy to understand explanation to the user of
the dose management system, the risks involved, and how to use the system safely. The user
shall be made aware that other sources may significantly contribute to their sound exposure, for
example work, transportation, concerts, clubs, cinema, car races, etc.
SIST EN IEC 62368-1:2019/A11:2020
10.6.5.2 Dose-based warning and requirements
When a dose of 100 % CSD is reached, and at least at every 100 % further increase of CSD, the
device shall warn the user and require an acknowledgement. In case the user does not
acknowledge, the output level shall automatically decrease to compliance with class RS1.
The warning shall at least clearly indicate that listening above 100 % CSD leads to the risk of
hearing damage or loss.
10.6.5.3 Exposure-based requirements
With only dose-based requirements, cause and effect could be far separated in time, defying the
purpose of educating users about safe listening practice. In addition to dose-based requirements,
a PMP shall therefore also put a limit to the short-term sound level a user can listen at.
The exposure-based limiter (EL) shall automatically reduce the sound level not to exceed
100 dB(A) or 150 mV integrated over the past 180 s, based on methodology defined in EN
50332-3. The EL settling time (time from starting level reduction to reaching target output) shall
be 10 s or faster.
Test of EL functionality is conducted according to EN 50332-3, using the limits from this clause.
For equipment provided as a package (player with its listening device), the level integrated over
180 s shall be 100 dB or lower. For equipment provided with a standardized connector, the un-
weighted level integrated over 180 s shall be no more than 150 mV for an analogue interface and
no more than -10 dBFS for a digital interface.
NOTE In case the source is known not to be music (or test signal), the EL may be disabled.

10.6.6 Requirements for listening devices (headphones, earphones, etc.)
10.6.6.1 Corded listening devices with analogue input
With 94 dB L acoustic pressure output of the listening device, and with the volume and sound
Aeq
settings in the listening device (for example, built-in volume level control, additional sound
features like equalization, etc.) set to the combination of positions that maximize the measured
acoustic output, the input voltage of the listening device when playing the fixed “programme
simulation noise” as described in EN 50332-1 shall be ≥ 75 mV.
NOTE The values of 94 dB and 75 mV correspond with 85 dB and 27 mV or 100 dB and 150 mV.
10.6.6.2 Corded listening devices with digital input
With any playing device playing the fixed “programme simulation noise” described in
EN 50332-1, and with the volume and sound settings in the listening device (for example, built-in
volume level control, additional sound features like equalization, etc.) set to the combination of
positions that maximize the measured acoustic output, the L , acoustic output of the listening
T
Aeq
device shall be ≤ 100 dB with an input signal of -10 dBFS.
SIST EN IEC 62368-1:2019/A11:2020
10.6.6.3 Cordless listening devices
In cordless mode,
– with any playing and transmitting device playing the fixed programme simulation noise
described in EN
...