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

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DAkkS D-ML-13154-02-00 Aachen, DE
Syndrom/Silver-Russell-Syndrom) SMN1 (SMA) FMR1-Gen (fraX, POF, FXTAS) Charcot-Marie-Tooth-Erkrankung Cardiolipin (CMT) + 3 more
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DAkkS D-ML-13154-03-00 Aachen, DE
Adrenalin Dopamin 5-Hydroxyindolessigsäure Homovanillinsäure Noradrenalin + 3 more
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DAkkS D-ML-13154-02-01 Aachen, DE
(Long Read): SNV, CNV, Repeats FMR1-Gen (fraX, POF, FXTAS) Charcot-Marie-Tooth-Erkrankung Cardiolipin (CMT) GARS1, GDAP1, GJB1, HSPB1, IGHMBP2, LITA + 3 more
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DAkkS D-ML-13154-01-01 Aachen, DE
Leukozyten (WBC) Erythrozyten (RBC) Hämatokrit (HCT) MCV Thrombozyten + 3 more
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DAkkS D-ML-13125-01-00 Bonn, DE
Thrombozytenaggregation Agonisten: ADP, ADP-PGE1, heparininduzierter Antikörper Heparin induzierter Thrombozytopenie Typ II (HIT II) + 3 more
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DAkkS D-ML-13125-03-01 Bonn, DE
Bannayan-Ruvalcaba-Riley-Syndrom (institutseigene Erweiterung des Illumina TruSight Cancer Panel): PTEN, AKT1, PIK3CA, SEC23B Syndrom (institutseigene + 3 more
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DAkkS D-ML-13125-02-00 Bonn, DE
Amiodaron, Desethylamiodaron HbA1c Vitamin A, Vitamin E Vitamin B1/B6 Vitamin B2 + 3 more
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DAkkS D-ML-19730-02-00 Dresden, DE
angeborener Chromosomensatz Nummerische Veränderungen Chromosomen 13, 18, 21, X und ldentifizierung kleinster chromosomaler/numerischer + 3 more
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DAkkS D-ML-19730-07-00 Dresden, DE
Brucella, Antikörper Candida, Antikörper Entamoeba histolytica, Antikörper Leptospiren, Antikörper Schistosoma, Antikörper + 3 more
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DAkkS D-ML-19730-01-00 Dresden, DE
Multiplate-Analyse (TRAP, ADP) Thrombozytenaggregation Born) Organische Säuren (Profil) Metanephrin, Normetanephrin + 3 more
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DAkkS D-ML-19730-06-00 Dresden, DE
Blutbild, Differentialblutbild Differentialblutbild Fragmentozyten Knochenmarkzytologie Liquor- und Ergusszytologie + 3 more
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DAkkS D-ML-13362-05-00 Düsseldorf, DE
Familiärer Brust- und Eierstockkrebs (TruRiskGenePanel des Deutschen Konsortiums Familiärer Brust- und Eierstockkrebs) (ATM, BARD1, BRCA1, BRCA2, BRIP1, CDH1, + 1 more
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DAkkS D-ML-13362-04-00 Düsseldorf, DE
Cyclosporin Everolimus Sirolimus Cyclosporin A, Everolimus, Sirolimus, Ta Vitamin A + 3 more
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DAkkS D-ML-13362-01-01 Düsseldorf, DE
Pilze (Dermatophyten, Schimmelpilze, Spr Mykobakterien anaerobe Bakterien, anspruchsvolle Schnellwachsende aerobe Cefinase-positive Bakterien + 3 more
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DAkkS D-ML-13297-07-01 Erlangen, DE
Azoospermie (AZFa,b, c Deletionen) Huntington (HTT) Fra(X)-Syndrom, FXTAS (FMR1) Familiärer Brust- und Eierstockkrebs (ATM (NM_000051), BRCA1 + 3 more
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DAkkS D-ML-13297-06-00 Erlangen, DE
Thrombozytenaggregation ASPI, COL, RISTO, TRAP) Steroide Profil 11-Deoxycortisol 11-Deoxycorticosteron + 3 more
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DAkkS D-ML-13297-08-00 Erlangen, DE
Interleukin 23 Rezeptor HLA-B27 HLA-A-Locus HLA-B-Locus HLA-C-Locus + 3 more
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DAkkS D-ML-13297-02-00 Erlangen, DE
Amitriptylin Bromazepam Chlordiazepoxid Clobazam Clomipramin + 3 more
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DAkkS D-ML-13297-03-00 Erlangen, DE
Aspergillus fumigatus AK Brucella spp.- Ak Candida spp. - Ak Cardiolipin AK Cryptococcus neoformans + 3 more
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DAkkS D-ML-13297-01-00 Erlangen, DE
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
Mycoplasma pneumoniae-DNA Bordetella pertussis- DNA Legionella pneumophila-DNA HIV-1, 2, Ak, Bestätigungstest Adenovirus IgA-Ak + 3 more
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DAkkS D-ML-13297-05-00 Erlangen, DE
5-Hydroxyindolessigsäure HbA1c Katecholamine Metanephrine, Normetanephrine Serotonin + 3 more
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DAkkS D-ML-18383-03-00 Essen, DE
Candida dubliensis -Ag Cardiolipin AK Clostridioides difficile AG Cryptococcus neoformans Echinococcus-Ak + 3 more
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DAkkS D-ML-18383-05-01 Essen, DE
Einordnung und Charakterisierung Minimale Resterkrankung myeloischen Leukämien monoklonale Gammopathien PNH-Diagnostik + 3 more
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DAkkS D-ML-18383-04-01 Essen, DE
Gendosisanalyse Gendosisanalyse (BE3A, SHOX ) Genet. Veränderung bei Tumorerkrankung: Analyse auf Verlust eines Chromosoms 3 + 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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