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
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Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Ingelheim

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Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Jena

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DAkkS D-ML-13452-05-00 Jena, DE
Zelldifferenzierung Erythrozyten Großes Blutbild Hämoglobin Kleines Blutbild + 3 more
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Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Mainz

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DAkkS D-ML-13452-07-00 Mainz, DE
Hämoglobin (immunologisch) CA 125 CA 15-3 CA 19-9 CA 72-4 + 3 more
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Bioscientia Institut für Medizinische Diagnostik GmbH Bioscientia MVZ Nordrhein

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DAkkS D-ML-13452-06-00 Moers, DE
Hämoglobin Natriumchlorid Kalium Natrium Eiweißelektrophorese: Albumin, Alpha-1-G + 3 more
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Bioscientia MVZ Labor Karlsruhe

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Bioscientia MVZ Labor Mittelhessen

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Bioscientia MVZ Labor Saar

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Lamotrigin Metanephrine, Normetanephrine Erythrozyten Aripiprazol Lymphozyten + 3 more
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Birmingham City Council

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UKAS 0726 Garretts Green, GB
(HSG 248) – 2021 ) (PCM) based on HSG 248) (PCM) based on HSG 248 staining based on HSG 248 (HSG 264, 2012)
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Bizerba SE &

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DAkkS D-PL-15018-01-00 Balingen, 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
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Black Forest Testlab

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DAkkS D-PL-22936-01-01 Löffingen, DE
DIN EN 61000-3 IEC 61000-3-2: 2014 IEC 61000-3-3 IEC 61000-3-11: 2017 IEC 61000-3-12: 2011 + 3 more
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Blower Door

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DAkkS D-K-19788-01-00 Springe-Eldagsen, DE
Positiver und negativer verwendete Abkürzungen: DKD-R
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Bradley Environmental Consultants

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UKAS 1155 Halesowen, GB
staining based on HSG 248 (HSG 248) – 2021 (PCM) based on HSG 248 (HSG 264:2012)
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Bremer Umweltinstitut Gesellschaft für Schadstoffanalytik und Begutachtung

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DAkkS D-PL-18812-01-02 Bremen, DE
DIN EN ISO 2418 DIN EN 61340-4-4 DIN CEN ISO/TS 16179 DIN EN ISO 14362-1 DIN EN ISO 14362-3 + 3 more
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Bridgend Asbestos Services

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UKAS 7864 Bridgend, GB
(HSG 248) – 2021 P10.2 based on HSG 248 (PCM) based on HSG 248
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British Airways Engineering Wales

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UKAS 24592 Barry, GB
TORQUE
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British Engineering Services

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UKAS 9230 Warrington, GB
ÖNORM EN ISO 3452-1 BS 3923-1:1986(Withdrawn) ASTM E165-23 BS 4124:1991(Withdrawn) DIN EN 10228-3 + 3 more
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Broadland Group

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UKAS 0295 Norwich, GB
(HSG 264, 2012)
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Broomfield Carbide Gauges

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UKAS 0103 Meltham, GB
Inch Millimetre
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Broughton Life Sciences

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UKAS 10636 Earby, GB
ISO 20768:2018)
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Brunel University London – Experimental Techniques Centre

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UKAS 2245 Uxbridge, GB
Based on ISO 10312:2019 and ISO SOP 16 by XRD (ISO BS EN
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Building Analysis & Testing

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UKAS 2612 Wraxall, GB
BS EN ISO 16283-1:2014+A1:2017BS EN ISO BS EN ISO 16283-2:2020 BS EN ISO 140-4:1998 BS EN ISO 717-2:2020 ISO 1407 + 2 more
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Bundesamt für Seeschifffahrt und Hydrographie

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DAkkS D-PL-12084-01-00 Hamburg, DE
IEC 60945 IEC 61162-1 IEC 61162-2 IEC 61162-450 IEC 61162-460 + 3 more
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Bundesamt für Strahlenschutz Radon-Kalibrierlaboratorium

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DAkkS D-K-15063-01-00 Berlin, DE
Radioaktivität 50 Bq/m³ Radon-222- 100 Bq/m³ tration in Luft 200 Bq/m³ + 3 more
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Bundesanstalt für Materialforschung und -prüfung (BAM) Abteilung 7 / Bauwerkssicherheit

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DAkkS D-PL-11075-01-01 Berlin, DE
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Bundesanstalt für Materialforschung und -prüfung (BAM) Fachbereich 8.1; Sensorik, mess- und prüftechnische Verfahren

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DAkkS D-K-11075-08-00 Berlin, DE
Conformity assessment — requirements for Railway composite brake blocks — require 0,2 kN 0,4 kN 100 kN + 3 more
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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

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