ISO 3746:2010

Sound Power Level — Survey Method

This test determines sound power levels of noise sources using an enveloping measurement surface and sound pressure level measurements. It is a survey-grade method suitable for field measurements of machinery, equipment, and industrial sources in moderately reflective environments. The method is widely used for noise compliance verification, product development, and environmental impact assessments. Accredited testing ensures consistent, defensible results for regulatory compliance and product labeling. This method bridges the gap between laboratory-grade precision and practical field measurements.

What it measures

  • Sound power level (Lw) in decibels
  • A-weighted and frequency-weighted sound power
  • Directional sound power distribution
  • Acoustic performance of noise sources
🇩🇪 DIN EN ISO 3744 🇬🇧 BS EN ISO 3744 🇫🇷 NF EN ISO 3744 🇮🇹 UNI EN ISO 3744 🇪🇸 UNE EN ISO 3744 🇳🇱 NEN EN ISO 3744 🇩🇪 DIN EN ISO 3745 🇬🇧 BS EN ISO 3745 🇫🇷 NF EN ISO 3745 🇮🇹 UNI EN ISO 3745 🇪🇸 UNE EN ISO 3745 🇳🇱 NEN EN ISO 3745
1,868 Accredited labs
20 Countries

Showing 1–25 of 254 labs

A.U.E.M.

Active
COFRAC 1-2303 Thiant, FR
ASTM E8/E 8M DIN EN 10002-1 ASTM E 21 DIN EN 10002-5 DIN EN ISO 6892-2 + 3 more
View Profile

A2E ENVIRONNEMENT

Active
COFRAC 1-6312 Gardanne, FR
DIN EN 27888 DIN EN ISO 10523 DIN EN ISO 7393-2 NF X 31-615 (Uniquement
View Profile

A2L ENVIRONNEMENT

Active
COFRAC 1-7214 Florange, FR
NF X 43-269 NF X 43-264 DIN EN ISO 16017-2 NF X 43-257 NF X 43-267 + 1 more
View Profile

A2M INDUSTRIE

Active
COFRAC 1-1249 Fraisses, FR
(BS EN ISO 6892-1: 2019) DIN EN 10002-1 ISO 6892-1 -2009 ASTM E8/E 8M ISO 6892-1 -2016 + 3 more
View Profile

AC Environnement

Active
COFRAC 1-6001 Riorges, FR
NF ISO 21438-3 NF X 43-269 NF ISO 21438-1 DIN EN ISO 16017-2 NF X 43-259 + 3 more
View Profile

ACEPE

Active
COFRAC 1-6133 Cherbourg-En-Cotentin, FR
NF X 43-269 NF X 43-269 – NF X 43-050 NF ISO 22262-1 (parties utiles ISO 16000-7
View Profile

ACM PHARMA

Active
COFRAC 1-7464 Bellegarde, FR
DIN EN 17126 DIN EN 13624 DIN EN 13727 DIN EN ISO 11930 DIN EN 14476 + 3 more
View Profile

ACTA INDUSTRIE - Laboratoire Acoustique et Climatique

Active
COFRAC 1-6965 Meyzieu Cedex, FR
DIN EN 12102-1 DIN EN 14511-3 DIN EN 14825 DIN EN 14511-4 DIN EN ISO 3741 + 1 more
View Profile

ACTINIUM

Active
COFRAC 1-6347 Sevres-Anxaumont, FR
NF X 43-269 NF X 43-264 NF X 43-298 NF X 43-259 NF X 43-257 + 3 more
View Profile

AD-LAB - Brussieu

Active
COFRAC 1-5606 Brussieu, FR
NF X 43-269 NF X 43-050 NF X43-269 – Annexe NF X43-050 (parties utiles de la norme) NF X43-050 (useful parts of the standard + 3 more
View Profile

ADOUR BIO CONSEIL - A.BIO.C.

Active
COFRAC 1-0905 Arzacq-Arraziguet, FR
0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 DIN EN ISO 6888-3 DIN ISO 11665-4 + 3 more
View Profile

ADRIA

Active
COFRAC 1-0144 Quimper Cedex, FR
DIN EN ISO 21528-1 DIN EN ISO 21528-2 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 + 3 more
View Profile

AEROLAB

Active
COFRAC 1-1974 Egly, FR
NF EN 12469 Annexe H pour PSM NF X 44-201 (Octobre 1984) pour PSM NF EN 12469 Annexe G NF X 44-201 DIN EN 12469 + 3 more
View Profile

AIRTHEMIS SUD EST

Active
COFRAC 1-7447 Venelles, FR
NF X 43-269 ISO NF X 43-257 NF X 43-050 ISO 16000-7
View Profile

ALDARIM

Active
COFRAC 1-6043 Sainte Helene Du Lac, FR
NF X 43-269 NF X 43-050 NF X43-050 (parties utiles de ISO 16000-7
View Profile

ALS

Active
COFRAC 1-5853 Saint-Pierre-De-Chandieu, FR
NF X 43-269 NF X43-050 (parties utiles de ISO 22262-1 NF X 43-257 NF X 43-050 + 1 more
View Profile

ALS France

Active
COFRAC 1-1364 Saint-Quentin-Fallavier, FR
DIN EN 14902 DIN ISO 16000-3 DIN EN ISO 16017-1 DIN EN ISO 16017-2 DIN ISO 16000-4 + 3 more
View Profile

ALS France – Site de Paris

Active
COFRAC 1-5578 Villebon-Sur-Yvette, FR
NF T 90-412 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN EN ISO 16649-3 DIN EN ISO 6888-3 + 3 more
View Profile

ALSTOM Transport VPF

Active
COFRAC 1-5603 Petite-Foret, FR
DIN EN ISO 11546-1 prEN 16185-2 EN 15595 (hors essais au
View Profile

AMIANT'AIR

Active
COFRAC 1-6507 Vandoeuvre Les Nancy, FR
NF X 43-269 NF X 43-298 DIN EN ISO 11689 NF X 43-257 NF X 43-050 + 1 more
View Profile

AN DIAG

Active
COFRAC 1-7298 Saint Etienne Du Rouvray, FR
NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de ISO 22262-1 NF X 43-050 + 1 more
View Profile

ANALY-CO Ile de France

Active
COFRAC 1-0876 Nanterre, FR
NF X 31-615 DIN EN ISO 7027-2 DIN EN ISO 10523 DIN EN 27888 DIN ISO 17289 + 3 more
View Profile

APAVE EXPLOITATION FRANCE

Active
COFRAC 1-7202 Courbevoie, FR
DIN EN 14385 ETSI EN 301 489-1 V2.2.3 2019-11 NF X43-551 IS EN 1948-1:2006 2006 DIN EN 14789 + 3 more
View Profile

AQUABIO

Active
COFRAC 1-7428 Saint Germain Du Puch, FR
DIN ISO 17289 NF T 90-395 NF T 90-354 NF T 90-393 NF T 90-328 + 3 more
View Profile

AQUANALYSE Laboratoire

Active
COFRAC 1-2194 Plancy L'Abbaye, FR
NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 DIN EN 12880 ISO 5815-1 + 3 more
View Profile

No matching labs found.

Industries

Industrial machinery and equipment manufacturing Environmental noise consulting Construction and power tool equipment HVAC and ventilation systems Occupational health and safety

Related Standards

  • ISO 3744 Determination of sound power levels of noise sources using sound pressure — Precision method in anechoic and hemi-anechoic rooms
  • ISO 3745 Determination of sound power levels of noise sources using sound pressure — Precision grade method for anechoic rooms and free fields over a reflecting plane
  • ISO 3747 Determination of sound power levels of noise sources using sound intensity — In-situ method using a reference sound source
  • ISO 9614-1 Determination of sound power levels of noise sources by sound intensity — Part 1: Measurement at discrete points

Other Test Methods

0 labs selected
Compare