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 1,826–1,850 of 1,868 labs

amedes Medizinisches Versorgungszentrum für Laboratoriumsmedizin und Mikrobiologie

Active
DAkkS D-ML-18746-01-01 Fürstenfeldbruck, DE
HbA1c Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Hämoglobin + 3 more
View Profile

amedes Medizinisches Versorgungszentrum für Laboratoriumsmedizin, Mikrobiologie und Genetik Hamburg

Active
DAkkS D-ML-20700-01-00 Hamburg, DE
Thombozyten-Funktionstest 10-OH-Carbazepin 11-Deoxycorticosteron 11-Deoxycortisol 21-Deoxycortisol + 3 more
View Profile

anemos Gesellschaft für Umweltmeteorologie

Active
DAkkS D-PL-17580-01-00 Reppenstedt, DE
IEC 61400-1 * IEC 61400-12-1 Ed. 2.0 * IEC 61400-12-1 * IEC 61400-50 * IEC 61400-50-1 * + 2 more
View Profile

bactologicum

Active
DAkkS D-PL-22114-01-01 Hamburg, DE
DIN EN 1040 DIN EN 1275 2006-03 IEC 60127-6 DIN EN 12791 2018-01 DIN EN 13624 2022-08 + 3 more
View Profile

biovis Diagnostik MVZ

Active
DAkkS D-ML-13188-01-01 Limburg a. d. Lahn- Eschhofen, DE
Lysozym = Sexualhormon bindendes Prolaktin Freies Thyroxin 4 (FT4) Beta-Defensin 2 + 3 more
View Profile

cdf Schallschutz, Dieter Friedemann

Active
DAkkS D-PL-19426-01-00 Dresden, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN 61400-11
View Profile

cetecom advanced

Active
DAkkS D-PL-12047-01-01 Saarbrücken, DE
ISO 7637-1 ISO 7637-2 ISO 7637-3: 2016 ISO 10605 ISO 11452-2: 2019 + 3 more
View Profile

dEnergy

Active
DAkkS D-PL-23069-01-01 Berlin, DE
ISO 9613-02
View Profile

deBAKOM Gesellschaft für sensorische Meßtechnik

Active
DAkkS D-PL-18963-01-00 Odenthal, DE
DIN 45645-2
View Profile

eco-INSTITUT Germany

Active
DAkkS D-PL-20051-01-01 Köln, DE
DIN ISO 16000-3 DIN ISO 16000-6 DIN EN ISO 16000-9 DIN EN ISO 16000-10 DIN EN ISO 16000-11 + 3 more
View Profile

enosite

Active
DAkkS D-PL-21111-01-00 Rerik, DE
ISO 9613-2
View Profile

esz AG calibration & metrology

Active
DAkkS D-K-15019-01-01 Landkreis Fürstenfeldbruck, DE
Hochspannung - Wechselspannung Bereiche Rechteckspannung Amplitudenparameter + 3 more
View Profile

eumetron

Active
DAkkS D-K-15151-01-01 Aalen, DE
− Durchmesser − Parallelendmaße − Formabweichung − Strichmaße, Abstände − Virtuelle Koordinatenmessgeräte + 3 more
View Profile

eurofins Umwelt West

Active
DAkkS D-PL-14078-01-03 Wesseling, DE
DIN 19698-1 DIN 19698-2 DIN ISO 11464 DIN EN ISO 54321 DIN EN 12457-4 + 3 more
View Profile

europascal

Active
DAkkS D-K-15055-01-01 Hanau, DE
- Gleichspannung / Messgeräte > 0 V > 0,22 V > 2,2 V + 3 more
View Profile

halstrup-walcher

Active
DAkkS D-K-21048-01-00 Kirchzarten, DE
Positiver und negativer Positiver Überdruck p e 1) In den CMC sind die erweiterten Messu
View Profile

i2 FAST

Active
UKAS 10852 Hemel Hempstead, GB
BS 4401-1:1998 Using N008-1 based on BS EN ISO 12966-4 2015 N008-2 based on BS EN N011 based on BS 4401-9:1975 and BS 770- + 3 more
View Profile

iKM Service

Active
DAkkS D-K-21115-01-00 Zwickau, DE
Industrielle Messtechnik ≤ 860 mm GmbH, Oberkochen, D
View Profile

iLF Magdeburg

Active
DAkkS D-PL-18869-01-01 Magdeburg, DE
DIN EN ISO 9117-3 DIN EN ISO 9117-5 DIN EN ISO 1463 DIN EN ISO 2808 DIN EN ISO 2178 + 3 more
View Profile

ifm prover gmbh Sensorik für die Prozeß- und Verfahrenstechnik

Active
DAkkS D-K-17060-01-00 Tettnang, DE
Taupunkttemperatur –0,91 bar bis Positiver und negativer Überdruck p *) (ein- oder mehrgängige + 3 more
View Profile

ifp-labs UK West Yorkshire

Active
UKAS 1916 Hebden Bridge, GB
on BS 4401:Part 3:1970(1986) ISO 12966-1:2014 and ISO 12966-4 CH 4026 based on BS 5766:Part CH 4001 based on BS EN 12014- + 3 more
View Profile

ift Rosenheim

Active
DAkkS D-PL-11349-01-01 Rosenheim, DE
ASTM E 330/E 330M ASTM E 283/E283M DIN 4103-1 DIN 68706-1 UNE-EN 12211 + 3 more
View Profile

iki Institut für Krankenhaushygiene und Infektionskontrolle

Active
DAkkS D-PL-21129-01-03 Gießen, DE
DIN EN ISO 5667-1 (A 4) DIN ISO 5667-5 (A 14) DIN EN ISO 5667-3 (A 21) DIN EN ISO 19458 (K 19) DIN 19643-1 + 3 more
View Profile

imetrologie GmbH Institut für Metrologie und Prozesstechnologie

Active
DAkkS D-K-15219-01-02 Helmstadt, DE
Taupunkttemperatur fixpunktzellen Railway braking — urban guided transport Railway vehicle body structural requirem SPRT-Sensor + 3 more
View Profile

innomatec Mess- und Schnellanschluss-Systeme

Active
DAkkS D-K-19194-01-00 Idstein, DE
Absolutdruck p abs > 0,8 bar > 1,2 bar > 20 bar + 3 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