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Page 4 of 16 

Report No.: W13-950-006  

IEC60950_1B - ATTACHMENT 

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analogue personal music players (personal 
  music players without any kind of digital 
  processing of the sound signal) that are brought 
  to the market before the end of 2015. 

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. 

 

For equipment which is clearly designed or 
intended for use by young children, the limits of 
EN 71-1 apply. 

 

 

Zx.2 Equipment requirements 
No safety provision is required for equipment that 
complies with the following: 
equipment provided as a package (personal 

music player with its listening device), where 

  the acoustic output L

Aeq,T 

is ≤ 85 dBA measured 

while playing the fixed “programme simulation 
noise” as described in EN 50332-1; and 

a personal music player provided with an 
  analogue electrical output socket for a listening 
  device, where the electrical output is ≤ 27 mV 
  measured as described in EN 50332-2, while 
  playing the fixed “programme simulation noise” 
  as described in EN 50332-1. 

NOTE 1 Wherever the term acoustic output is used in this 
clause, the 30 s A-weighted equivalent sound pressure level 
L

Aeq,T 

is meant. See also Zx.5 and Annex Zx. 

 

All other equipment shall: 

a) protect the user from unintentional acoustic  
  outputs exceeding those mentioned above; and
b) have a standard acoustic output level not 
  exceeding those mentioned above, and 

  automatically return to an output level not 
  exceeding those mentioned above when the
  power is switched off; and 
 

 N/A 

 

 

Page 5 of 16 

Report No.: W13-950-006  

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c) provide a means to actively inform the user of 
  the  increased sound pressure when the 
  equipment is operated with an acoustic output 
  exceeding  those mentioned above. Any means 
  used shall  be acknowledged by the user before 
  activating a mode of operation which allows for 
  an acoustic output exceeding those mentioned 
  above. The acknowledgement does not need to 
  be repeated more than once every 20 h of 
  cumulative listening time; and 

NOTE 2 Examples of means include visual or audible signals. 
Action from the user is always required. 
NOTE 3 The 20 h listening time is the accumulative listening 
time, independent how often and how long the personal music 
player has been switched off. 

d) have a warning as specified in Zx.3; and

 

 e) not exceed the following: 

  1) equipment provided as a package (player 
  with Its listening device), the acoustic output 
 shall 

be 

≤ 100 dBA measured while playing the 

  fixed “programme simulation noise” described 
  in EN 50332-1; and 
  2) a personal music player provided with an 
  analogue electrical output socket for a listening 
  device, the electrical output shall be ≤ 150 mV 
  measured as described in EN 50332-2, while 
  playing the fixed “programme simulation noise” 
  described in EN 50332-1. 

For music where the average sound pressure 
(long term L

Aeq,T

) measured over the duration of  

the song is lower than the average produced by 
the programme simulation noise, the warning 
does not need to be given as long as the average 
sound pressure of the song is below the basic 
limit of 85 dBA. In this case T becomes the 
duration of the song. 

NOTE 4 Classical music typically has an average sound 
pressure (long term L

Aeq,T

) which is much lower than the 

average programme simulation noise. Therefore, if the player 
is capable to analyse the song 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 is 
below the basic limit of 85 dBA. 
For example, if the player is set with the programme 
simulation noise to 85 dBA, but the average music level of the 
song is only 65 dBA, 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 dBA.

 

 

 

 

 

Page 6 of 16 

Report No.: W13-950-006  

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Zx.3 Warning 
The warning shall be placed on the equipment, or 
on the packaging, or in the instruction manual 
and shall consist of the following: 
the symbol of Figure 1 with a minimum height of 
  5 mm; and 
the following wording, or similar: 

 

“To prevent possible hearing damage, do not 
listen at high volume levels for long periods.” 

 

 

 

 

 

 

Alternatively, the entire warning may be given 
through the equipment display during use, when 
the user is asked to acknowledge activation of the 
higher level. 

 N/A 

 

N/A 

Zx.4.1 Wired listening devices with analogue 
input 
With 94 dBA sound pressure output L

Aeq,T

, the 

input voltage of the fixed “programme simulation 
noise” described in EN 50332-2 shall be ≥ 75 mV.

 

This requirement is applicable in any mode where 
the headphones can operate (active or 
passive), including any available setting (for 
example built-in volume level control). 

 

NOTE The values of 94 dBA – 75 mV correspond with 85dBA 
– 27 mV and 100 dBA – 150 mV.

 N/A 

 

 

Page 7 of 16 

Report No.: W13-950-006  

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Zx.4.2 Wired listening devices with digital 
input 
With any playing device playing the fixed 
“programme simulation noise” described in EN 
50332-1 (and respecting the digital interface 
standards, where a digital interface standard 
exists that specifies the equivalent acoustic level), 
the acoustic output L

Aeq,T 

of the listening device 

shall be ≤ 100 dBA. 

 

This requirement is applicable in any mode where 
the headphones can operate, including any 
available setting (for example built-in volume level 
control, additional sound feature like equalization, 
etc.). 

 

NOTE An example of a wired listening device with digital input 
is a USB headphone.

 N/A 

Zx.4.3 Wireless listening devices 
In wireless mode: 
with any playing and transmitting device playing 
  the fixed programme simulation noise described 
  in EN 50332-1; and 
respecting the wireless transmission standards, 
  where an air interface standard exists that 
  specifies the equivalent acoustic level; and 
with volume and sound settings in the listening 
  device (for example built-in volume level 
control,  

additional sound feature like 

equalization, etc.)   set to the combination of 
positions that  

maximize the measured 

acoustic output for the  

abovementioned 

programme simulation noise,  

the acoustic 

output L

Aeq,T 

of the listening device  

shall be ≤ 

100 dBA. 

 

NOTE An example of a wireless listening device is a Bluetooth 
headphone.

 N/A 

Zx.5 Measurement methods 
Measurements shall be made in accordance with 
EN 50332-1 or EN 50332-2 as applicable.    
Unless stated otherwise, the time interval T shall 
be 30 s. 

 

NOTE Test method for wireless equipment provided without 
listening device should be defined.

 N/A