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Standard
ISO 5114-1
First edition
Acoustics — Determination of
2024-06
uncertainties associated with sound
emission measures —
Part 1:
Sound power levels determined
from sound pressure measurements
Acoustique — Détermination des incertitudes associées aux
mesurages de l’émission sonore —
Partie 1: Niveaux de puissance acoustique déterminés à partir des
mesurages de pression acoustique
Reference number
ISO 5114-1:2024(en) © ISO 2024
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ISO 5114-1:2024(en)
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Published in Switzerland
© ISO 2024 – All rights reserved
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ISO 5114-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General concept to describe the uncertainty of measured sound power levels . 2
5 Determination of σ .3
omc
Determination of σ by round robin tests .4
6
R0
Detailed uncertainty budget to determine σ .6
7
R0
Determination of σ .7
8
tot
Annex A (informative) Detailed uncertainty budget for sound power determinations in
(approximated) free fields according to the direct enveloping method . 9
Annex B (informative) Detailed uncertainty budget for sound power determinations in
(approximated) diffuse fields according to the direct method . 17
Annex C (informative) Detailed uncertainty budget for sound power determinations using a
reference sound source .22
Bibliography .26
© ISO 2024 – All rights reserved
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ISO 5114-1:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmen
...