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Uncertainties in Pressure Calibration of Laboratory Standard Microphones by Reciprocity Technique  

서상준 (한국표준과학연구원 물리표준부 음향진동그룹)
권휴상 (한국표준과학연구원 물리표준부 음향진동그룹)
이용봉 (한국표준과학연구원 물리표준부 음향진동그룹)
서재갑 (한국표준과학연구원 물리표준부 음향진동그룹)
Publication Information
The Journal of the Acoustical Society of Korea / v.23, no.2, 2004 , pp. 90-102 More about this Journal
Abstract
According to the Mutual Recognition Arrangement (MRA), the calibration and/or test laboratories should satisfy the management and technical requirements ISO 17025 or equivalent. Chapter 5, Section 5.10.4 of the technical requirement of ISO 17025 suggests the required informations for calibration certificates, one of them is to state the uncertainty of measurement. The uncertainties of measurement in reciprocity calibration of standard laboratory microphone were calculated. The expanded uncertainties for 1 and 1/2 inch microphones were 0.03 dB in the middle frequency range and they increased up to 0.10 dB and 0.11 dB at 20 Hz, 0.07 dB and 0.08 dB at high frequency, respectively.
Keywords
Standard microphone; Reciprocity calibration; Pressure sensitivity level; Mutual recognition arrangement(MRA); Expanded uncertainty;
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