FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Reference environmental conditions
5 Principles of pressure calibration by reciprocity
  5.1 General principles
      5.1.1 General
      5.1.2 General principles using three microphones
      5.1.3 General principles using two microphones and an
            auxiliary sound source
  5.2 Basic expressions
  5.3 Insert voltage technique
  5.4 Evaluation of the acoustic transfer impedance
  5.5 Heat-conduction correction
  5.6 Capillary tube correction
  5.7 Final expressions for the pressure sensitivity
      5.7.1 Method using three microphones
      5.7.2 Method using two microphones and an auxiliary
            sound source
6 Factors influencing the pressure sensitivity of microphones
  6.1 General
  6.2 Polarizing voltage
  6.3 Ground-shield reference configuration
  6.4 Pressure distribution over the diaphragm
  6.5 Dependence on environmental conditions
      6.5.1 Static pressure
      6.5.2 Temperature
      6.5.3 Humidity
      6.5.4 Transformation to reference environmental conditions
7 Calibration uncertainty components
  7.1 General
  7.2 Electrical transfer impedance
  7.3 Acoustic transfer impedance
      7.3.1 General
      7.3.2 Coupler properties
      7.3.3 Microphone parameters
  7.4 Imperfection of theory
  7.5 Uncertainty on pressure sensitivity level
Annex A (normative) Heat conduction and viscous losses
        in a closed cavity
Annex B (normative) Acoustic impedance of a capillary tube
Annex C (informative) Examples of cylindrical couplers for
        calibration of microphones
Annex D (informative) Environmental influence on the
        sensitivity of microphones
Annex E (informative) Methods for determining microphone
        parameters
Annex F (informative) Physical properties of humid air