FOREWORD
1 Scope
2 Normative references
3 General conditions
   3.1 General
   3.2 Measurement conditions
4 Particular conditions
   4.1 Pre-conditioning
   4.2 Sound source
   4.3 Measurement of sound pressure
   4.4 Voltage measuring system
   4.5 Acoustical environment
   4.6 Methods of measuring frequency response
   4.7 Overall accuracy
   4.8 Graphical presentation of results
5 Type description (acoustical behaviour)
   5.1 Principle of the transducer
   5.2 Type of microphone
   5.3 Type of directional response characteristics
6 Terminals and controls
   6.1 Marking
   6.2 Connectors and electrical interface values
7 Reference point and axis
   7.1 Reference point
   7.2 Reference axis
8 Rated power supply
   8.1 Characteristic to be specified
   8.2 Method of measurement
9 Electrical impedance
   9.1 Internal impedance
   9.2 Rated impedance
   9.3 Minimum permitted load impedance
10 Sensitivity
   10.1 General
   10.2 Sensitivities with respect to acoustical
        environment
   10.3 Sensitivities with respect to nature of signal
11 Response
   11.1 Frequency response
   11.2 Effective frequency range
12 Directional characteristics
   12.1 Directional pattern
   12.2 Directivity index
   12.3 Front-to-rear sensitivity index (0 degree -
        180 degree)
   12.4 Noise-cancelling index
   12.5 Special characteristics for stereo microphones
13 Amplitude non-linearity
   13.1 General
   13.2 Total harmonic distortion
   13.3 Harmonic distortion of the n[th] order (n = 2, 3,.)
   13.4 Difference frequency distortion of second order
14 Limiting characteristics
   14.1 Rated maximum permissible peak sound pressure
   14.2 Overload sound pressure
15 Balance
   15.1 Balance of the microphone output
   15.2 Balance under working conditions
16 Equivalent sound pressure level due to inherent noise
   16.1 Characteristic to be specified
   16.2 Method of measurement
17 Ambient conditions
   17.1 General
   17.2 Pressure range
   17.3 Temperature range
   17.4 Relative humidity range
18 External influences
   18.1 General
   18.2 Equivalent sound pressure due to external
        magnetic fields
   18.3 Equivalent sound pressure due to mechanical
        vibration
   18.4 Equivalent sound pressure due to wind
   18.5 Transient equivalent sound pressure due to
        "pop" effect
   18.6 Equivalent sound pressure due to electromagnetic
        interference
   18.7 Electrostatic discharge
19 Magnetic stray field
   19.1 Characteristic to be specified
   19.2 Method of measurement
20 Physical characteristics
   20.1 Dimensions
   20.2 Weight
   20.3 Cables and connectors
21 Classification of the characteristics to be specified
   21.1 General
   21.2 Classification
Annex A (normative) - Sound insulation device
Annex B (informative) - Simplified procedure for
        "pop" measurements
Bibliography