scope:

This International Standard applies to transducers. However, if the electrical input terminals and the surface of the radiator are accessible, this standard can also apply to passive and active sound systems such as loudspeakers, headphones, TV-sets, multi-media devices, personal portable audio devices, automotive sound systems and professional equipment. This standard describes only electrical and mechanical measurements which help assess the transfer behaviour of the device under test (DUT). This includes operating the DUT in both the small and large signal domains. The influence of the target application's acoustical boundary conditions (e.g. car interior) can also be considered in the physical evaluation of the sound system. Perception and cognitive evaluations of the reproduced sound and the impact of perceived sound quality are outside the scope of this standard. NOTE - This standard does not apply to microphones and other sensors. Implementation of this standard does not require access to the sound pressures generated in the near or far fields of the radiator. Directivity and other characteristics describing the electro-acoustical transfer properties are described in IEC 60268-21 which covers acoustical measurements.