Scope
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
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DIN EN ISO 3740
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BS EN ISO 3740
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NF EN ISO 3740
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UNI EN ISO 3740
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UNE EN ISO 3740
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NEN EN ISO 3740
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DIN EN ISO 3744
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BS EN ISO 3744
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NF EN ISO 3744
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UNI EN ISO 3744
🇪🇸
UNE EN ISO 3744
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NEN EN ISO 3744
1,670
Accredited labs
18
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Showing 701–725 of 1,670 labs
Intona
Active
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
(HSG 264, 2012)
Isserstedt Prüfmaschinen
Active
Härte* 20 HRA
Härtevergleichsplatten
20 HRB
20 HRC
40 HRD
+ 3 more
J B-Monitor
Active
(HSG 248) – 2021
No 1 based on HSG 248 – 2021
(PCM) based on HSG 248 – 2021
No 3 based on HSG 248 – 2021
(PCM) based on HSG 248
+ 1 more
JCS Technology
Active
ISO 178
BS 5350:Part C13
BS 2782 Part 10 Method 1005
BS EN ISO 14125
MIL-STD 810G:2008 Method 501.5
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JOMA INGENIERÍA Y MONTAJES
Active
UNE-EN ISO 16283-1
UNE-EN ISO 16283-3
UNE-EN ISO 16283-2
UNE 320001
ISO/IEC 18045
ISO/IEC 15408
CEM ISO
ISO/IEC 24759
+ 2 more
Charpy impact test (ISO 148-1)
Salt spray / neutral salt fog test (ISO
elektronische Waagen
Innen- und Tiefenmaße
Konventioneller
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Javer Labs
Active
MIL-STD-810G, Method 508:7
BS 2011:2.1 Ca:1977
(IEC 60068-2-10:2005+A1:2018,
MIL-STD-810H, Method 508:8
Ebenheitsabweichung
verkörperungen z.B.
platten nach DIN 876:1984
Geradheitsabweichung
ebener Flächen, z.B.
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Johnson and Allen
Active
DC CURRENT
INSPECTION EQUIPMENT
AC CURRENT 50 Hz RMS
uncertainties may be increased.
Johs. Boss
Active
Außengewinde
Flankendurchmesser 3 mm bis 100 mm
0,5 mm bis 6 mm)
unsymmetrischem Profil
schiedlichen Ausgabeständen gestattet.
+ 3 more
MIL-PRF-46103E
DIN EN ISO 15106-3
DIN EN ISO 1522
DIN EN ISO 1523
ISO 16935:2007
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CD45 Percp+CD16+56+CD3
CD4
CD45 Percp+CD4+CD8
Adalimumab
Anti-Adalimumab Antikörper
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Jurjanz
Active
Parallelendmaße aus 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße aus > 100 mm
Messschieber für
1350 mm
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KB Prüftechnik
Active
Härteprüfmaschinen nach 100 HBW
Brinell- und
226 HBW
messeinrichtungen von
Härteprüfmaschinen
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basophile, eosinophile, Granulozyten
Differenzialblutbild
Erythrozyten
Erythrozytenverteilungsbreite
(RDW)
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KOLLMORGEN Europe
Active
IEC 61000-4-2: 2008
VDE 0847-4-2
IEC 61000-4-4: 2012
VDE 0847-4-4
IEC 61000-4-5: 2005
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KP Acoustics Research Labs
Active
BS EN ISO 10140-2:2021
ISO 3745
ISO 7171
IEC 60601-1
accordance with BS EN ISO 5349-1
KRIWAN Testzentrum
Active
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
KROMSCHROEDER
Active
Caudal m3/h 0,010 m3/h Q 250 m3/h 0,
Caudal m3/h 0,16 m3/h Q 2500 m3/h 0,
KSW Kalibrierservice
Active
Gleichspannung 100 µV
Messgeräte 220 mV
> 2,2 V
> 11 V
> 22 V
+ 3 more
Kapraun Prüfdienst
Active
Railway brake — magnetic track brakes (U
− Ebenheit
− Geradheit
− Winkelnormale
auch als Vor-Ort-Kalibrierung
+ 3 more
IEH
Active
DIN EN 60034-15
VDE 0530-15
IEC 60034-15
DIN EN 60044-7
VDE 0414-44-7
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