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APMP (Asia Pacific Metrology Programme) Regional Intercomparison Results of Acoustic Calibrators  

서상준 (한국표준과학연구원 물리표준부 음향진동그룹)
서재갑 (한국표준과학연구원 물리표준부 음향진동그룹)
조문재 (한국표준과학연구원 물리표준부 음향진동그룹)
Publication Information
The Journal of the Acoustical Society of Korea / v.22, no.6, 2003 , pp. 463-471 More about this Journal
Abstract
The results of the APMP (Asia Pacific Metrology Programme) regional intercomparison of acoustic calibrators were reviewed and analyzed. The artefacts used in intercomparison are a sound level calibrator and a pistonphone. The microphones used to measure the output pressure level are 1" and 1/2" standard microphones (LS1P, LS2P) as well as 1" and 1/2" reference microphones (WS1P/F, WS2P/F). The results obtained using standard microphones are satisfactory, but those obtained by the reference microphones, even though E/sub n/ values are within ±1.0, showed great deviations. Such results had come from the inaccurate calibration of reference microphones. By using the correct calibration results which were obtained by the recently established international standards, the new results were very similar to those of the foreign standard institutes.
Keywords
Acoustic calibrator; Key comparison; National measurements standards; Sound level calibrator; Pistonphone;
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  • Reference
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[] / IEC 61094-4, Measurement Microphones-Part 4, Specifications for Working Standard Microphones
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[ ISO ] / Guide to the Expression of Uncertainty in Measurement
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[] / IEC 61094-1, Measurement Microphones-Part 1, Specifications for Laboratory Standard Microphones
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[] / IEC 61094-2, Measurement Microphones-Part 2, Primary Method for Pressure Calibration of Laboratory Standard Microphones by the Reciprocity Technique
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[] / Operating Manual for the B&K 4228 Pistonphone
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[] / IEC 61094-5, Measurement Microphones-Part 5, Method for Pressure Calibration of Working Standard Microphones by Comparison
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[] / IEC 60942, Acoustic Calibrators