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Uncertainty calculations of pressure sensitivity of one inch microphones using pressure field method at nis

Author:

Abd El Fattah A. Mahmoud, Hany A. Shawky, Rabab S. Youssef, Tarek M. El-basheer and Hatem Kh. Mohamed

Subject Area:

Physical Sciences and Engineering

Abstract:

Primary calibration method is used by relatively few laboratories such as national calibration laboratories and few large automotive, space or governmental organizations which work at high technological level. The National Metrology Institute of Egypt (NIS) has developed a pressure calibration system that used for calibration of pressure sensitivities. In this study, we estimate the uncertainty of unknown one inch condenser microphone using two known references one inch condenser microphones according to international standard. IEC 61094-2009 which gives more information's and details on the uncertainty calculations. In this method a wide frequency range with a high accuracy and repeatability were achieved.

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