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The Measurement System for Small Microphone's Electro Acoustic Characteristics

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2007, 12(3), pp.259-266
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

박병욱 1 Kim, Hack-Yoon ORD ID 1

1청주대학교

Accredited

ABSTRACT

The parameters of electric acoustic characteristic used as standards to evaluate the performance of a small microphone are composed of sensitivity, harmonic distortion, frequency response, directivity and others. Such characteristic parameters should be designed differently depending on a purpose, so it is important to verify whether a small microphone was made appropriately for the purpose after measuring the acoustic characteristics. Therefore, a system that can measure the acoustic characteristic parameters of a small microphone using DSP, not only simultaneously but also in real-time, was implemented in this paper. To verify the implemented system, four kinds of microphones were measured and the results were compared with the data values of the acoustic characteristics of each microphone. There were a little discrepancy between them because the conditions when measuring the characteristics were not identical. But it was verified that the errors are within the error tolerance and it proved that the system can be used in place of the conventional equipment used in measuring the acoustic characteristics of small microphones.

Citation status

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