< back to main site

Publications

Comparison of measurement uncertainty budgets for calibration of sound calibrators: Euromet projet 576.

Hanes, P (2001) Comparison of measurement uncertainty budgets for calibration of sound calibrators: Euromet projet 576. NPL Report. CMAM 73

[img] Text
cmam73.pdf

Download (418kB)

Abstract

Sound calibrators are designed to produce a known sound pressure level and their main use is to calibrate acoustical measurement systems. IEC 60942:1997 specifies various performance classes for sound calibrators and gives maximum permitted uncertainties of measurement for determining the output sound pressure level. Thirteen national measurement laboratories participated in a Euromet project to compare the measurement uncertainties of calibration of sound calibrators.
Inspection of the submissions shows that the budgets are numerically correct, and generally follow the recommendations of the relevant ISO Guide. For almost all the participants, the greatest contribution to the measurement uncertainty is the uncertainty in calibration of the reference devices. Few omissions of significant sources of uncertainty were identified. Tables of numeric values of uncertainties for calibration of pistonphones are supplied. The reported expanded uncertainties exceed the maximum permitted uncertainties for class 0 calibrators that are specified in IEC 60942:1997 in only one case. The report gives recommendations to the participants for improving clarity and obtaining better mutual agreement.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMAM 73
Keywords: acoustics, sound calibrator, measurement uncertainty
Subjects: Acoustics
Acoustics > Sound in Air
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2081

Actions (login required)

View Item View Item