EN 61094-1:2000

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Reference environmental conditions
5 Classification of laboratory standard microphone
   5.1 General
   5.2 Type designation
6 Characteristics of laboratory standard microphones
   6.1 Sensitivity
   6.2 Acoustic impedance
       6.2.1 General
       6.2.2 Equivalent volume of a microphone
   6.3 Upper limit of the dynamic range of a microphone
   6.4 Static pressure dependence of microphone sensitivity
   6.5 Temperature dependence of microphone sensitivity
   6.6 Humidity dependence of microphone sensitivity
   6.7 Electrical insulation resistance
   6.8 Stability of microphone sensitivity
   6.9 Pressure-equalizing leakage
7 Specifications
   7.1 Mechanical dimensions
   7.2 Ground shield reference configuration
   7.3 Electroacoustical specifications
   7.4 Identification markings
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

Specifies mechanical dimensions and certain electroacoustic characteristics for condenser microphones used as laboratory standards for the realization of the unit of sound pressure and for sound pressure measurements of the highest attainable accuracy. The specifications are intended to ensure that primary calibration by the reciprocity method can be readily carried out. Establishes a system for classifying laboratory standard condenser microphones into a number of types according to their dimensions and properties.