ISO/IEC GUM applied to estimation of sound power measurement uncertainties

Auteurs-es

  • Stephen E. Keith Healthy Environments and Consumer Safety Branch, Product Safety Directorate, Consumer and Clinical Radiation Protection Bureau, Acoustics Division, 775 Brookfield Rd., 6301B, Ottawa, ON K1A 1C1, Canada

Mots-clés :

Sensitivity analysis, Standards, Tropical engineering, Combined standard uncertainties, Environmental, Guide to the Expression of Uncertainty in measurements, ISO/IEC, Measurement points, Measurement standards, Partial coefficients, Planar measurements, Sensitivity coefficients, Sound levels, Sound powers, Sound pressures, TO estimations, Worst cases

Résumé

The methods to implement ISO/IEC Guide to the expression of uncertainty in measurement (GUM) and the ISO engineering grade sound power standard are provided. The sound sensitivity coefficients are partial coefficients of the sound power and the combined standard uncertainty is the summation in quadrature of all uncertainty contributions to the sound power. Each uncertainty contribution is calculated from the measurement standard deviation and the sensitivity coefficient. ISO also puts a limit on a decibel range of the measures sound levels and this range is equal to the number of measurement points. Sound pressure obtained on an very large planar measurement surface very close to a very large piston can give a good estimate of sound power. It is shown that when the environmental correction is zero, the worst case sensitivity coefficient is 1, with the resulting worst case sensitivity contribution of 2.3 dB.

Fichiers supplémentaires

Publié-e

2008-09-01

Comment citer

1.
Keith SE. ISO/IEC GUM applied to estimation of sound power measurement uncertainties. Canadian Acoustics [Internet]. 1 sept. 2008 [cité 5 mai 2026];36(3):90-1. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2052

Numéro

Vol. 36 No. 3 (2008)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

Licence

Author Licensing Addendum

This Licensing Addendum ("Addendum") is entered into between the undersigned Author(s) and Canadian Acoustics journal published by the Canadian Acoustical Association (hereinafter referred to as the "Publisher"). The Author(s) and the Publisher agree as follows:

  1. Retained Rights: The Author(s) retain(s) the following rights:

    • The right to reproduce, distribute, and publicly display the Work on the Author's personal website or the website of the Author's institution.
    • The right to use the Work in the Author's teaching activities and presentations.
    • The right to include the Work in a compilation for the Author's personal use, not for sale.

  2. Grant of License: The Author(s) grant(s) to the Publisher a worldwide exclusive license to publish, reproduce, distribute, and display the Work in Canadian Acoustics and any other formats and media deemed appropriate by the Publisher.

  3. Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.

  4. No Conflict: This Addendum is intended to be in harmony with, and not in conflict with, the terms and conditions of the original agreement entered into between the Author(s) and the Publisher.

  5. Copyright Clause: Copyright on articles is held by the Author(s). The corresponding Author has the right to grant on behalf of all Authors and does grant on behalf of all Authors, a worldwide exclusive license to the Publisher and its licensees in perpetuity, in all forms, formats, and media (whether known now or created in the future), including but not limited to the rights to publish, reproduce, distribute, display, store, translate, create adaptations, reprints, include within collections, and create summaries, extracts, and/or abstracts of the Contribution.