The project is to perform trial sound level meter verifications, using the CDV version of the new sound level meter standard IEC 1672:199X as the basis.
The test protocol will be defined from Annex B of IEC 1672, with each participating laboratory testing one sound level meter (apart from the co-ordinator who will test several meters).
The project has two main aims: firstly, to compare the results and measurement uncertainties from different laboratories, and secondly to consider whether any improvements are necessary to the wording of Annex B to avoid misinterpretation.
Conclusions will be reported to IEC TC29/ WG4 'Sound level meters'.
The proposed finishing date for this project is May 1998.
NPL proposes to act as co-ordinator. The project was completed and the final report published in September 1998, as NPL Report CMAM 25.