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
1,868
Accredited labs
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Shell Nederland Raffinaderij
Active
ISO 10370
DIN EN ISO 5163
IP 411, ISO 6251
ISO 3405
NEN 6646
+ 3 more
DIN EN 772-16
BS EN ISO 10545-2:2018
DIN EN 1344
DIN EN 12953-8
DIN EN 16510-2-4
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TAUW
Active
NEN 2826
NEN-EN 14791 2
ASTM D4157-13
ETSI EN 301 489-1 V2.2.3 2019-11
DIN EN 14792
+ 3 more
DIN EN ISO 3596
DIN EN ISO 14780
BS ISO 18283:2022
DIN EN ISO 10893-6
DIN EN 61442
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The Auditing Company
Active
#EN ISO 5164:14
# EN 116-97
# ISO 13736
NEN 4400-1
#ISO 6618
TÜV NORD Nederland
Active
DIN EN ISO 17232
DIN EN 14960
NEN 3140
#EN ISO 5164:14
EN 1069
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DIN EN ISO 16911-1
DIN EN 14789
DIN EN 14790
DIN EN 13725:2003-07 und Berichtigung
AG2 and IS EN 15259:2007
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