Measurement of the performance of sound level meters using IEC 61672-3:2006


  • Peter Hanes Institute for National Measurement Standards, National Research Council Canada, 1200 Montreal Rd., Ottawa, Ont. K1A 0R6, Canada


Acoustic signal processing, Calibration, Mathematical models, Calibrated sound calibrators, Electrical signals, Single frequency


IEC 61672-3:2006 provides the first internationally agreed methods for measuring the performance of individual sound level meters (SLM). Pattern approval tests are specified in IEC 61672-2, but are in practice only performed in countries where legal requirements exist for testing a model of SLM before it may be sold. A calibrated sound calibrator is applied in order to determine the overall sensitivity at a reference level at a single frequency. The indicated sound level with no input signal is noted; this corresponds to the level of self-generated noise in the SLM. The indicated peak C sound level in response to single cycle and half cycle sinusoidal electrical signals is measured and compared with the theoretical ideal response. IEC 61672-3 should be recommended for use in Canada with appropriate guidance on its use with respect to older SLMs.



How to Cite

Hanes P. Measurement of the performance of sound level meters using IEC 61672-3:2006. Canadian Acoustics [Internet]. 2007Sep.1 [cited 2021Apr.12];35(3):144-5. Available from:



Proceedings of the Acoustics Week in Canada