CALIBRATION OF SOUND LEVEL METERS ACCORDING TO REQUIREMENT OF THE INTERNATIONAL STANDARD IEC 61672-3:2013

Abstract

This article thoroughly studies the process of calibrating sound level
meters based on the requirements of the international standard IEC 61672-3:2013 and its significance. Accurate measurement of sound pressure level plays an important role in environmental monitoring, industrial noise control, healthcare, and occupational safety. The main goal of the research is to analyze the calibration process in accordance with the standard requirements for acoustic parameters of sound pressure level measuring instruments. The article details the theoretical foundations of the calibration of sound level meters, measurement methods, and calculation formulas. We also present the components that comprise the measurement uncertainty, which include the acoustic multifunctional calibrator, sound level meter, and its microphone. We looked at the measurement uncertainty using a visual analysis method and figured out the percentage of each uncertainty component compared to the total sum. The study used the “MK 265” microphone model from “Ассистент” with the factory number 450924, and based on the results, it looked at which parts of the uncertainty had the biggest and smallest impact on the measurement uncertainty, and suggestions were made to reduce uncertainty and improve measurement methods.