This standard BS EN 61842:2002 Microphones and earphones for speech communications is classified in these ICS categories:
17.140.50 Electroacoustics
33.160.50 Accessories
Applies to the microphone part and earphone part of handsets, headsets or earsets for speech communications, and also to the microphone units and earphone units of built-in handsets, headsets or earsets. Establishes definitions relating to these electroacoustic transducers, standardizes the characteristics to be specified and the relevant methods of measurement.