Measurement_MicrophonesThis booklet gives an introduction to the design features and operating principles of measuring microphones. Some knowledge about the measurement of sound would be an advantage and so you might wish to consult our companion booklets 'Measuring Sound' and 'Sound Intensity'.See pageSee pageIntroduction ...............................................…...……………. 2 What is a measuring microphone? ...........……...........….. 3 Construction and principle of operation …...................... 4 'Externally polarized' or 'prepolarized'? .............………... 5 Preamplifiers and power supplies ..............................…... 6 Characteristics ...........................................................…..... 7 Directivity and size ................................…….…......…..... 8 Open-circuit ……