ISO 3743-1

Sound power — reverberation field engineering method

ISO 3743-1 specifies the reverberation room method for determining sound power levels of noise sources, suitable for smaller sources or laboratory environments where sound pressure is measured in a reverberant acoustic field. The method is applicable across a wide frequency range and is commonly used for equipment testing, product compliance assessment, and environmental noise impact studies. This engineering-level method balances accuracy with practical testing constraints and is widely required for EU noise directive compliance and product CE marking. Accreditation demonstrates laboratory control of environmental conditions, proper instrumentation calibration, and competence in complex acoustic data analysis.

What it measures

  • Sound power level (Lw) using sound pressure in reverberation room
  • A-weighted and frequency-weighted sound power
  • Octave band sound power levels (31.5 Hz to 8 kHz)
  • Sound power uncertainty and test environment correction
  • Directional sound power characteristics
🇩🇪 DIN EN ISO 3740 🇬🇧 BS EN ISO 3740 🇫🇷 NF EN ISO 3740 🇮🇹 UNI EN ISO 3740 🇪🇸 UNE EN ISO 3740 🇳🇱 NEN EN ISO 3740 🇩🇪 DIN EN ISO 3744 🇬🇧 BS EN ISO 3744 🇫🇷 NF EN ISO 3744 🇮🇹 UNI EN ISO 3744 🇪🇸 UNE EN ISO 3744 🇳🇱 NEN EN ISO 3744
1,868 Accredited labs
20 Countries

Showing 551–575 of 906 labs

QS-Grimm

Active
DAkkS D-K-15159-01-01 Gutach Schwarzwaldbahn, DE
Parallelendmaße * 0,5 mm DIN EN ISO 3650:1999 Zylindrische Normale 1 mm Innenzylinder * > 100 mm + 3 more
View Profile

Qopas

Active
DAkkS D-K-12048-01-00 Driedorf, DE
Koordinatenmessgeräte geräte mit einem Chorus, Help-PJM von DEA Hexagon Metrology S.p.A., Turin, I Associates EMS Products, ≤ 1500 mm + 3 more
View Profile

Questmed

Active
DAkkS D-PL-18753-02-00 Kleinmachnow, DE
ISO 22679 ISO 7207-1 ISO 14243-1 ISO 14243-2 ISO 14243-3 + 3 more
View Profile

REHAU Industries SE &

Active
DAkkS D-PL-22158-01-01 Rehau, DE
DIN EN ISO 2808 DIN EN ISO 11885 DIN EN 12697-28 DIN EN ISO 1172 DIN EN ISO 2578 + 3 more
View Profile

RIO

Active
DAkkS D-K-17376-01-00 Siegen, DE
Parallelendmaße * 0,5 mm DIN EN ISO 3650:1999 > 100 mm > 500 mm > 550 mm + 3 more
View Profile

RMA Mess- und Regeltechnik

Active
DAkkS D-K-20908-01-00 Rheinau, DE
Durchfluss von Gasen Volumendurchfluss 50 m³/h Railway brakes — brake performance (UIC (Hochdruck Erdgas 5 bis 51 bar) + 1 more
View Profile

ROTA YOKOGAWA

Active
DAkkS D-K-17720-01-00 Wehr, DE
Masse m strömender − Durchfluss von Flüssigkeiten Durchfluss von 1) In den CMC sind die erweiterten Messu Massedurchfluss dm / dt + 3 more
View Profile

Ramm Ingenieur

Active
DAkkS D-PL-20808-01-00 Wuppertal, DE
DIN 45635-1 DIN 45645 Teil 1
View Profile

Regierungspräsidium Kassel Hessische Geräteuntersuchungsstelle

Active
DAkkS D-PL-19353-02-02 Kassel, DE
IEC 60335-1: 2010 VDE 0700-1 DIN EN 60335-2-2 DIN EN 60335-2-3: 2002 DIN EN 60335-2-4 + 3 more
View Profile

Robert Koch-Institut

Active
DAkkS D-ML-13113-01-01 Berlin, DE
Salmonellen Salmonella enterica, Shigellen, Yersinie Shigellen Salmonella sv. Paratyphi Neisseria meningitidis, Listeria + 3 more
View Profile

Rolf Langenscheid GmbH Waagensystemtechnik

Active
DAkkS D-K-21801-01-00 Lüdenscheid, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO elektronische Waagen 1) In den CMC sind die erweiterten Messu
View Profile

Ruhr Lab

Active
DAkkS D-PL-21007-01-00 Gelsenkirchen, DE
ISO 13909-2 ISO 13909-3 ISO 13909-5 ISO 13909-7 ISO 13909-8 + 3 more
View Profile

Ruhr Oel GmbH BP Gelsenkirchen

Active
DAkkS D-PL-19612-01-00 Gelsenkirchen, DE
DIN EN ISO 12185 DIN EN ISO 3405 DIN EN 13016-1 DIN EN ISO 20884 DIN EN ISO 20846 + 3 more
View Profile

Ruhr-Universität Bochum Humangenetik RUB

Active
DAkkS D-ML-13425-01-00 Bochum, DE
Spinocerebelläre Ataxien Bindegewebserkrankungen: ACTA2, COL1A1, HD; Chorea Huntington (Huntingtin-Gen) Dentatorubrale-Pallidoluysiane + 3 more
View Profile

S.K.I. Schlegel & Kremer Industrieautomation GmbH Kalibrierlabor

Active
DAkkS D-K-21982-01-00 Mönchengladbach, DE
Durchfluss von 2 m3/h bis 800 rn3/h − Durchfluss von Flüssigkeiten Volumendurchfluss dV/dt von strörnenden + 3 more
View Profile

SBKS

Active
DAkkS D-PL-11303-01-01 St. Wendel, DE
DIN 53394-2 DIN 53176 DIN EN ISO 1172 ASTM D 5576 IEC 60512-11-4 + 3 more
View Profile

SCHMIDT Technology

Active
DAkkS D-K-21939-01-00 St. Georgen im Schwarzwald, DE
Strömungsgeschwin- 0,1 m/s − Strömungsgeschwindigkeit von Gasen Kraft (WPM) Vibration measuring instruments — requir > 1 kN
View Profile

SCHÜCO International KG Technology Center

Active
DAkkS D-PL-11030-01-01 Bielefeld, DE
DIN EN ISO 717-1 DIN EN ISO 10052 DIN EN ISO 10140-1 DIN EN ISO 10140-2 DIN EN ISO 10140-4 + 3 more
View Profile

SGS Analytics Germany

Active
DAkkS D-PL-14004-01-01 Fellbach, DE
DIN EN ISO 5667-1 (A 4) DIN 38402-A 11 DIN 38402-A 12 DIN 38402-A 13 DIN ISO 5667-5 (A 14) + 3 more
View Profile

SGS Germany

Active
DAkkS D-PL-11020-03-01 Puchheim, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 IEC 61000-4-6: 2013 + 3 more
View Profile

SGS Germany GmbH Oil, Gas and Chemicals, Fuel Technology Centre

Active
DAkkS D-PL-11020-01-00 Speyer, DE
DIN 51757 ASTM D 4052 DIN EN ISO 12185 DIN EN ISO 3405 DIN EN 13016-1 + 3 more
View Profile

SGS INSTITUT FRESENIUS

Active
DAkkS D-PL-14115-02-09 Taunusstein, DE
DIN EN ISO 2639 DIN EN ISO 6507-1 DIN EN ISO 6508-1 DIN EN 10328 DIN 50190-3 + 3 more
View Profile

SGS-TÜV Saar

Active
DAkkS D-PL-12088-02-01 Sulzbach, DE
DIN EN 61800-5-1: 2017 DIN 45645 Teil 1 DIN 45680 Beiblatt 1 DIN 45645 Teil 2 DIN EN ISO 11202 + 3 more
View Profile

SIANTEC- Silvio Herzog e. K.

Active
DAkkS D-K-20004-01-00 Haiger-Dillbrecht, DE
Härte (WPM) 80 HBW und Knoop-Verfahren 150 HV (Härteskalen HV5 bis HV100) 150 HV (Härteskalen HV 0,1 bis HV 3) + 3 more
View Profile

SKD GmbH System Kalibrier Dienst

Active
DAkkS D-K-17733-01-01 Hornberg, DE
Absolutdruck Pabs > 0,05 bar Negativer und positiver Überdruck p (ein- oder mehrgängige + 1 more
View Profile

No matching labs found.

Industries

Power tool and equipment manufacturers Laboratory and medical device makers Small machinery producers Consumer electronics manufacturers Heating and ventilation equipment suppliers

Related Standards

  • ISO 3740 Acoustics — Determination of sound power levels of noise sources — General guidelines
  • ISO 3744 Acoustics — Determination of sound power levels of noise sources — Engineering method using an enveloping surface
  • ISO 354 Acoustics — Measurement of sound absorption coefficient in a reverberation room

Other Test Methods

0 labs selected
Compare