BS EN 60268-4:2010 Sound system equipment. Microphones
BS EN 60268-4 specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer.
BS EN 60268-4 applies to sound system microphones for all applications for speech and music. It does not apply to measurement microphones, but it does apply to each audio channel of microphones having more than one channel, for example for stereo or similar use. It is also applicable to flush-mounted microphones and to the analogue characteristics of microphones with digital audio output.
The characteristics specified in BS EN 60268-4 do not completely describe the subjective response of the microphone. Further work is necessary to find new definitions and measurement procedures for a later replacement by objective characteristics of at least some of the subjective descriptions used to describe microphone performance.
Contents of BS EN 60268-4:
1 Scope
2 Normative references
3 General conditions
4 Particular conditions
5 Type description (acoustical behaviour
6 Terminals and controls
7 Reference point and axis
8 Rated power supply
9 Electrical impedance
10 Sensitivity
11 Response
12 Directional characteristics
13 Amplitude non-linearity
14 Limiting characteristics
15 Balance
16 Equivalent sound pressure level due to inherent noise
17 Ambient conditions
18 External influences
19 Magnetic stray field
20 Physical characteristics
21 Classification of the characteristics to be specified
