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
1,670 Accredited labs
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DAkkS D-ML-13297-08-00 Erlangen, DE
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Aspergillus fumigatus AK Brucella spp.- Ak Candida spp. - Ak Cardiolipin AK Cryptococcus neoformans + 3 more
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maschinelles Blutbild maschinelles Differentialblutbild DRVVT, Lupus Antikoagulantien Protein S (Aktivität) Exogene Gerinnungsfaktoren + 3 more
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DAkkS D-ML-13297-04-00 Erlangen, DE
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5-Hydroxyindolessigsäure HbA1c Katecholamine Metanephrine, Normetanephrine Serotonin + 3 more
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DAkkS D-ML-18383-04-01 Essen, DE
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DAkkS D-ML-18383-06-00 Essen, DE
membranständiger Antigene CD4, CD8, CD14, CD16, CD19, CD45, CD56) Tuberkulose ELISpot CMV ELISpot Lymphozytentransformationstest + 3 more
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DAkkS D-ML-18383-06-01 Essen, DE
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DAkkS D-ML-18383-08-00 Essen, DE
Candida dubliensis -Ag Cardiolipin AK Clostridioides difficile AG Cryptococcus neoformans Echinococcus-Ak + 3 more
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DAkkS D-ML-18383-09-00 Essen, DE
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DAkkS D-ML-18383-07-01 Essen, DE
Gendosisanalyse Gendosisanalyse (UBE3A, SHOX Genet. Veränderung bei Tumorerkrankung: Analyse auf Verlust eines Chromosoms 3 + 3 more
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DAkkS D-ML-18383-02-00 Essen, DE
Glykosyliertes Hämoglobin Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Leukozyten + 3 more
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DAkkS D-ML-13102-08-01 Frankfurt, DE
Thyreoidea stimulierendes Thyreotropes Hormon (TSH) 17-Hydroxyprogesteron Immunreaktives Trypsin Pancreatitis-assoziiertes + 3 more
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DAkkS D-ML-13102-01-00 Frankfurt am Main, DE
Antistreptolysin (ASL) Antistaphylosin (AST) Candida spp.-Antikörper Echinokokken-Antikörper Kryptokokken-Antigen + 3 more
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DAkkS D-ML-13102-03-00 Frankfurt am Main, DE
Adenovirus-Antigen Astrovirus Antigen Chikungunya-Virus-Antikörper Immunglobulin M (IgM) Coxsackie A9, A24, B, B1, B5, B6 Virus-A + 3 more
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DAkkS D-ML-13102-04-00 Frankfurt am Main, DE
D-Dimere Freies Protein-S Antigen Protein S Antigen frei vWV:Ag Hemmkörper + 3 more
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DAkkS D-ML-13102-02-00 Frankfurt am Main, DE
Basophile Basophile absolut Eosinophile Eosinophile absolut Erythrozyten + 3 more
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DAkkS D-ML-13102-06-00 Frankfurt am Main, DE
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DAkkS D-ML-13134-02-01 Freiburg, DE
Cardiolipin-Antikörper Leptospiren-Antikörper Shigellen (O-Antigene) Treponema pallidum-Antikörper Borrelien IgG + IgM + 3 more
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DAkkS D-ML-13134-03-01 Freiburg, DE
anti-CMV IgG anti-CMV IgM CMV IgG Avidität Chikungunya Virus IgG Chikungunya Virus IgM + 3 more
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DAkkS D-ML-13134-05-00 Freiburg, DE
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DAkkS D-ML-13134-10-01 Freiburg, DE
NGS-Panel-Analyse (SNVs, Indels CNVs), Gene: WDR73, WNT4, WNT5A, XRCC4, YY1, ZMPSTE24 PYCR1, RNF213, ROBO4, SETD5, SLC2A10, SL GPC3, HERC1, HIST1H1E, NFIX, OFD1, RNF13 + 3 more
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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

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