Abstract
The Standards and Calibration Laboratory (SCL) in Hong Kong has developed a system for calibration of quar-ter-inch working standard (WS3) microphones which automates the measurement process and generates digital calibration certificates (DCCs) to meet the growing demand for microphone calibration services in Hong Kong. This paper describes (i) the method of determining the pressure sensitivity of a microphone combination unit from 20 Hz to 20 kHz by the comparison technique in accordance with the International Standard IEC 61094-5, (ii) the measurement model and uncertainty evaluation, and (iii) the automatic system which facilitates the calibration process and generation of a digital calibration certificate.
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