Scope
ISO 3740
Sound power level determination — general measurement guidelines
ISO 3740 provides overarching principles and guidelines for selecting appropriate methods to determine sound power levels of noise sources across diverse industrial and consumer applications. It establishes the framework for choosing between precision, engineering, and survey methods based on application requirements and environmental conditions. Sound power determination is essential for manufacturers complying with noise emission directives, environmental impact assessments, and product labeling regulations across the EU. ISO 17025 accreditation ensures laboratories apply correct methodologies, maintain calibrated instrumentation, and report results with documented uncertainty traceable to primary standards.
What it measures
- Sound power level (Lw) in decibels
- Frequency-weighted sound power (A-weighted)
- Octave or one-third-octave band sound power
- Sound energy levels
- Noise source classification and categorization
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DIN EN ISO 3743-1
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BS EN ISO 3743-1
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NF EN ISO 3743-1
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UNI EN ISO 3743-1
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UNE EN ISO 3743-1
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NEN EN ISO 3743-1
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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
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UNE EN ISO 3744
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NEN EN ISO 3744
1,868
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20
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Showing 801–825 of 1,868 labs
DC Resistance
AC VOLTAGE (continued)
AC POWER
AC CURRENT
Generation (continued)
+ 3 more
Intek
Active
DIN EN 60068-2-30
IEC 62080
IEC 61000-6-1
IEC 61000-6-2: 2005
DIN EN 61010-1
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Intertek Caleb Brett GERMANY
Active
DIN EN ISO 12185
ASTM D 4052
DIN EN ISO 3405
ASTM D 86
DIN EN 13016-1
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Intertek Consumer Goods
Active
IEC 62321-2
DIN EN 61340-4-4
DIN EN 12472
DIN EN 16711-1
DIN EN 1264-5
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Intertek Deutschland
Active
IEC 61000-3-2: 2014
IEC 61000-3-3
IEC 61000-3-11: 2017
IEC 61000-3-12: 2011
IEC 61000-4-2: 2008
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Intertek Polychemlab
Active
DIN EN ISO 10675-1
DIN EN ISO 19458
DIN EN ISO 179-1
NEN 6953
DIN EN ISO 10675-2
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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
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Istituto Giordano SpA
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EN 14304:2009+A1:2013
EN 14305:2009+A1:2013
DIN EN ISO 12623
DIN EN 1873
DIN EN 14963
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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
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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
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Jackson and Keay
Active
BS EN ISO 11623:2015
BS EN ISO 18119:2018+A1:2021
BS EN ISO 10460:2018
BS EN 20745:2020
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
(ein- und mehrgängige
winde mit geradlinigen
unsymmetrischem Profil
0,5 mm bis 6 mm)
Außengewinde Nenndurchmesser
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MIL-PRF-46103E
DIN EN ISO 15106-3
DIN EN ISO 1522
DIN EN ISO 1523
ISO 16935:2007
+ 3 more
Obligat anaerobe Bakterien
mikroaerophile Bakterien
ESBL-Bildner
(multiresistente gramnegative
säurefeste Stäbchen
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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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K B Calibration Services
Active
LENGTH
ended (excluding length bars)
Chronic progressive external
Dial gauges and dial test
Caliper Gauges
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