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
1,670 Accredited labs
18 Countries

Showing 876–900 of 1,670 labs

Laboratoire Départemental d'Analyses de la Mayenne (LDA 53)

Active
COFRAC 1-0674 Laval Cedex, FR
DIN EN ISO 21528-2 DIN EN ISO 6888-2 DIN ISO 16649-2 DIN ISO 11665-4 NF T90-007 + 3 more
View Profile

Laboratoire Départemental d'Analyses des Ardennes (LDA 08)

Active
COFRAC 1-0885 Hagnicourt, FR
NF T 90-412 DIN EN ISO 7899-1 NF U47-101 DIN EN ISO 10523 NF T90-015-2 + 3 more
View Profile

Laboratoire d'Analyses Pumonte (LA2A)

Active
COFRAC 1-6512 Ajaccio Cedex 9, FR
DIN EN ISO 14403-2 DIN EN ISO 13395 DIN EN ISO 10304-1 DIN EN ISO 15061 ISO 5815-1 + 3 more
View Profile

Laboratoire d'Analyses de Surveillance et d'Expertise de la Marine (LASEM) - Base Navale de Brest

Active
COFRAC 1-1931 Brest, FR
DIN EN ISO 17294-2 NF T 90-412 VDE 414-9-11 DIN EN ISO 10304-1 DIN EN ISO 9698 + 3 more
View Profile

Laboratoire d'Analyses des Eaux de Pays de Montbéliard Agglomération

Active
COFRAC 1-6554 Voujeaucourt, FR
DIN EN ISO 17294-2 NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 ISO 5815-1 + 3 more
View Profile

Laboratoire d'Hydrologie - Environnement

Active
COFRAC 1-6567 Bordeaux Cedex, FR
DIN EN 27888 NF T 90-412 DIN EN ISO 7393-2 DIN EN 26461-2 DIN EN ISO 10523 + 3 more
View Profile

Laboratoire d'Olfactométrie - EGIS

Active
COFRAC 1-2314 Aix-En-Provence, FR
DIN EN 13725:2003-07 und Berichtigung
View Profile

Laboratoire de Contrôle des Eaux

Active
COFRAC 1-6404 Clermont Ferrand, FR
DIN EN ISO 17294-2 DIN EN ISO 7899-1 VDE 414-9-11 DIN EN ISO 10304-1 DIN EN ISO 10523 + 3 more
View Profile

Laboratoire de Microbiologie RD&E

Active
COFRAC 1-6419 Sainghin-En-Melantois, FR
DIN EN 17126 DIN EN 14562 DIN EN 14348 IEC 60127-5 DIN EN 14563 + 3 more
View Profile

Laboratoire de l'Environnement et de l'Alimentation de la Vendée (LEAV)

Active
COFRAC 1-1064 La Roche-Sur-Yon Cedex 9, FR
DIN ISO 11665-4 DIN 53483-2 DIN EN ISO 7937 NF V08-050 NF V 08-060 + 3 more
View Profile

Laboratori chimici Stante srl

Active
ACCREDIA 00790 Bologna, IT
ISO 12846 ISO 11348-3 DIN EN 12457-2 ISO 9377-2 ISO 19250 + 3 more
View Profile

Laboratorio Analisi BIO 5 Servizi

Active
ACCREDIA 00727 Castel Maggiore, IT
UNI 13649 EPA 6010 DIN EN 12880 DIN EN 13284-1 UNI 9432 + 3 more
View Profile

Laborgemeinschaft Berlin - Labor 28

Active
DAkkS D-ML-17159-01-00 Berlin, DE
Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Hämatokrit Leukozyten + 3 more
View Profile

Laborgemeinschaft Köln

Active
DAkkS D-ML-18033-01-00 Köln, DE
Liste aller Untersuchungsverfahren im fl Webpräsenz des Medizinischen Laboratoriu HbA1c Basophile Basophile absolut + 3 more
View Profile

Laborgemeinschaft Odenwald

Active
DAkkS D-ML-18493-01-00 Darmstadt, DE
HbA1c Großes Blutbild Kleines Blutbild Retikulocyten Natriumchlorid + 3 more
View Profile

Laborärzte Sindelfingen

Active
DAkkS D-ML-13247-01-01 Sindelfingen, DE
Ristocetin Kofactor Aktivität Willibrand Faktors a-Hydroxy-Alprazolam Amilsulprid 7-amino-Flunitrazepam + 3 more
View Profile

Labosport

Active
UKAS 4098 Hucknall, GB
DIN EN 12228 DIN EN 14808 ASTM D 1177 DIN EN 12234 ISO 2549 + 3 more
View Profile

Lambda Calibration

Active
UKAS 0495 Chorley, GB
PRESSURE (cont’d) Distortion Factor Spot frequency Phase angle (Herpes simplex virus type + 3 more
View Profile

Lambeth Scientific Services

Active
UKAS 0937 Chessington, GB
(HSG 248) – 2021 (PCM) based on HSG 248 P-12 based on HSG 248
View Profile

Lancashire County Scientific Services

Active
UKAS 0625 Preston Riversway Docklands, GB
(HSG 248) – 2021 (PCM) based on HSG 248 ISO 12966-2 F06 6 & F06 5 based on BS EN F05 4 based on BS 770:Part + 3 more
View Profile

Landesuntersuchungsanstalt für das Gesundheits- und Veterinärwesen Sachsen

Active
DAkkS D-ML-18515-01-00 Dresden, DE
GPT GOT GGT Salmonellen Shigellen + 3 more
View Profile

Latzke Härteprüfung

Active
DAkkS D-K-19233-01-00 Wiehl, DE
Kraft (WPM) Kraftmesseinrichtungen von Werkstoffprüfmaschinen nach DIN 51220 * Acoustics — tonality assessment (DIN 456 + 3 more
View Profile

Leadec BV &

Active
DAkkS D-K-21171-01-01 Chemnitz, DE
Gleichspannung 33 mV Messgeräte 0,33 V 330 V Gleichstromstärke 33 µA Messgeräte 0,33 mA + 3 more
View Profile

Leftfield Environmental

Active
UKAS 6998 Port Talbot, GB
(HSG 264, 2012)
View Profile

Leftfield Environmental

Active
UKAS 4707 Port Talbot, GB
(HSG 248) – 2021 LSOP6 based on HSG 248 (PCM) based on HSG 248
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