This part of IEC 60268, is applicable to headphones, earphones, headsets and earsets, intended to be used on, or in, the human ear. It also applies to equipment, such as pre-amplifiers, passive networks and power supplies which form an integral part of the headphone system.
It does not deal with:
a) safety, for which reference should be made to IEC 62368-1 or another appropriate standard;
b) the characteristics of microphones of headsets, for which reference should be made to IEC 60268-4;
c) earphones and other devices for hearing aids, for which reference should be made to IEC 60118-0;
d) headphones for audiometry;
e) headphones and other devices which form part of an active ear-defender system, although some of its provisions may be applicable;
f) active noise cancelation characteristics as covered by IEC 60268-24.
This standard specifies the characteristics which should be included by the manufacturer in specifications, and relevant methods of measurement. It includes a classification of the different types of earphones, mainly characterized by the way in which the transducer is coupled acoustically to the ear, and a classification code which may also be used for marking.
Rated conditions and characteristics in this standard are not strictly subject to measurement, except by the manufacturer. Measurement methods for rated characteristics are provided for the benefit of manufacturers for the purpose of test repeatability and data comparison. External test houses may then use the same method for verification of manufacturers' specifications.
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