AVR 370 (serv.man4) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 92

 

Page 6 of 15 

Report No.: 215445 

 
 

ATTACHMENT 4 

Clause 

Requirement + Test 

Result - Remark 

Verdict 

       

TRF No. IEC60065K 

Cont. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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.

No portable sound system. 

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. 

No portable sound system.