SN EN 60268-7 : 1996

1 General
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Classification, designation and coding
1.5 Marking of terminals, controls and polarity
1.6 User instructions
2 Conditions for specifications and measurements
2.1 Rated conditions
2.2 Standard conditions for measurement
2.3 Couplers and ear simulators
2.4 Loudness comparison conditions
2.5 Ear canal sound pressure level measurement
       conditions
3 Characteristics to be specified and their methods
       of measurement
3.1 Power supply
3.2 Electrical impedance
3.3 Input voltage
3.4 Input power
3.5 Sound pressure (level)
3.6 Frequency response
3.7 Amplitude non-linearity
3.8 Rated climatic conditions (these are rated
       conditions)
3.9 External magnetic field
3.10 Unwanted sound radiation
3.11 Sound attenuation
3.12 Crosstalk attenuation for multi-channel headphones
3.13 Application force (this is a rated condition)
3.14 Physical characteristics, cables and connectors
4 Classification of characteristics
Annexes
A (normative) Specification and conditions of use of
       a microphone for use inside the ear canal
B (informative) Practical details of free-field
       comparison conditions
C (informative) Practical details of diffuse-field
       comparison conditions
D (informative) Practical details of the subjective
       comparison and ear canal sound pressure level
       conditions
E (informative) Bibliography
ZA (normative) Normative references to international
       publications with their corresponding European
       publications

ALSO NUMBERED AS BS 6840 PT7 1996 Applicable to headphones, headsets, earphones and earsets for use on or in the human ear. Also describes pre-amplifiers, passive networks and power supplies forming an integral part of the headphone system. Not applicable to safety, characteristics of microphones of headsets, earphones and other devices for hearing aids, headphones for audiometry and headphones and other equipment forming part of an active ear-defender system.