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Environmental Effects on Microphone Characteristics


Once the characteristics are embodied in a microphone, it remains for the manufacturer to state how measurement results will be affected by passing time or changing environmental conditions. This is done by publishing time, temperature, pressure, and humidity coefficients to describe the influence of the environment on microphone sensitivity. Of course, the smallest possible coefficients the better so that measurement results need not be continually corrected for environmental changes.

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CONTENTS

  1. Influences on characteristics — the progress of time
  2. How temperature affects microphones
  3. Influences on characteristics — humidity
  4. Effects of vibration on microphones
  5. Influences on characteristics — leakage
  6. Other influences on characteristics

The various coefficients described in the following pages are stated in the microphone specifications. They are not measured individually for each microphone since the production quality of the Brüel & Kjær measurement microphones is very consistent. This consistency permits Brüel & Kjær to publish information that is useful to users whether their microphone was manufactured yesterday — or many years ago.

Influences on microphone characteristics