Scope
ISO 3747:2010
Sound Power Level — In-Situ Reference Source Method
This engineering/survey method determines sound power levels using a calibrated reference sound source to account for acoustic environmental conditions during in-situ measurements. It is particularly useful for large or immobile equipment where laboratory testing is impractical, and for on-site verification of noise compliance. The reference source approach compensates for acoustic environmental effects, improving accuracy compared to basic survey methods. Accreditation ensures proper reference source maintenance and measurement protocols are followed. This method is essential for field acceptance testing and environmental noise assessments.
What it measures
- Sound power level (Lw) referenced to 1 pW
- A-weighted and frequency-weighted sound power
- Environmental acoustic correction factors
- In-situ acoustic performance
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DIN EN ISO 3746
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BS EN ISO 3746
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NF EN ISO 3746
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UNI EN ISO 3746
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UNE EN ISO 3746
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NEN EN ISO 3746
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DIN EN ISO 9614-1
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BS EN ISO 9614-1
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NF EN ISO 9614-1
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UNI EN ISO 9614-1
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UNE EN ISO 9614-1
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NEN EN ISO 9614-1
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HFB Engineering
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DIN EN ISO 10666
DIN 53438-3
rs738409
DIN EN 1382
DIN EN 1383
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Gleichspannung a)
/ Messgeräte
> 600 kV
Messsysteme, Teiler
> 5 kV
+ 3 more
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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HLK Stuttgart
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DIN EN 442-2
DIN EN 16430-1
DIN EN 16430-2
DIN EN 16430-3
DIN 4703-3
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HOP'LAB
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NF X43-050 (parties utiles de
NF X 43-050
NF X43-050 (parties utiles de la
HORIBA MIRA
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IEC/CISPR 25
DIN EN 55025: 2018
ISO 7637-2
ISO 11451-1
IEC/CISPR 12
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ISO 16063-21
UNE-EN 60942
UNE-EN 61260
UNE-EN 61672-3
UNE-EN 60804
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accordance with BS EN ISO 5349-1
ISO 5667-5
UNI 10500
DIN EN ISO 10523
DIN EN 12341
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HSL Compliance
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(HSG 248) – 2021
M003 based on HSG 248
(PCM) based on HSG 248
M002based on HSG 248
HSG 227 (2004))
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HYDAC Systems & Services
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Gleichspannung 0 µV
Messgeräte > 20 mV
Messgeräte > 200 mV
> 2 V
> 20 V
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DIN EN ISO 10140-1
DIN EN ISO 717-1
DIN EN ISO 10140-2
DIN EN ISO 10140-4
DIN EN ISO 10140-5
HaBu Hauck Prüftechnik
Active
Härte *) 20 HRA
Härtevergleichsplatten 20 HRB
nach Rockwell Verfahren 20 HRC
40 HRD
60 HRF
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Hampshire Scientific Service
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(HSG 248) - 2021
ASB/SOP/OM8 based on HSG 248
ASB/SOP/OM6 based on HSG 248
DIN EN 12697-11
on BS 4401:Part 3:1970(1986)
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Hann Tucker Associates
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ISO 7171
ISO 1407
BS EN ISO 140-4:1998
BS EN ISO 717-2:2020
Hartford Steam Boiler UK
Active
BS 2790 - Specification for the design a
BS 1113 - Specification for the design a
BS EN 13480 Parts 1 to 8 - Metallic
EN 13445 – Parts 1 to 10 Unfired pressur
BS EN ISO 15614 and ASME IX
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automatische Zelldifferenzierung
Erythrozyten
Leukozyten
Retikulozyten
Thrombozyten
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Healthy Abode
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ISO 7171
BS EN ISO 140-4:1998
BS EN ISO 16283-1:2014+A1:2017BS EN ISO
BS EN ISO 16283-2:2020
HTM 08-01 - 2013
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(HSG 264, 2012)
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
Kraft (WPM)
Werkstoffprüfmaschinen
Acoustics — tonality assessment (DIN 456
messeinrichtungen von
Härte (WPM) 30 HBW
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Absolutdruck p
abs
> 41 bar
Negativer und
positiver Überdruck
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Heywood Williams Components
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DIN EN 1026
DIN EN 12046-2
BS 6375-1:2015 + A1:2016 and the
DIN EN 1027
DIN EN 1629
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Hohenstein Laboratories
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DIN 53160
DIN 54034
DIN 54056
DIN EN 20105-A02
DIN EN 20105-N01
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