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
1,670
Accredited labs
18
Countries
Showing 51–75 of 183 labs
UNE-EN ISO 16283-1
UNE-EN ISO 16283-2
UNE-EN ISO 16283-3
UNE-EN ISO 3382-2
OM H-3 based on ISO 9698:2019
ISO 13164-4
SM 3111
UNE-EN ISO 13160
ISO 10704
+ 3 more
UNE-EN ISO 5667-19
UNE-EN ISO 16665
UNE-EN 19493
SM 2510 B
SM 4500 H+
UNE 7027-1
UNE 7887
SM 4500-NO B 2
+ 3 more
UNE-EN 136
UNE-EN 148-1
UNE-EN 140
UNE-EN 149
UNE-EN 13274-7
+ 3 more
CIRCUTOR, S.A. (Unipersonal)
Active
UNE-EN 61000-4-2
UNE EN 61000-4-5
UNE-EN 55016-2-1
UNE-EN 61000-4-11
UNE-EN 61000-4-8
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UNE-EN ISO 140-5
UNE-EN ISO 16283-3
UNE-EN ISO 140-7
UNE-EN ISO 16283-1
UNE-EN ISO 140-4
CLOVER TECHNOLOGIES
Active
ISO/IEC 15408-3
ISO/IEC 15408-1
ISO/IEC 15408-2
ISO/IEC 15408-4
ISO/IEC 15408-5
+ 1 more
CEM EL-020
EURAMET cg-17
CEM EL
CEM ME-004
EURAMET cg-11
+ 3 more
UNE 118019
UNE 118012
ISO 22980
UNE 118020
UNE 118021-2
CONSORCI DE MEDI AMBIENT I SALUT PÚBLICA DE LA GARROTXA (SIGMA) LABORATORI POLIVALENT DE LA GARROTXA
Active
SM 3111 B
SM 3500-K B SM 3500-Na B
SM 2330 B
SM 3113 B
UNE-EN ISO 8467
+ 3 more
IEC 61730-2
IEC 61215-1-2
IEC 61215-2
IEC 61215-1-3
IEC 61215-1-4
+ 3 more
DIPE ELECTRÓNICA
Active
0 mV U < 330 mV 330 mV U < 3,3 V 3,3
0 mV U < 120 mV 120 mV U < 1,2 V 1,2
0 A I 330 A 330 A < I 3,3 mA 3,
20 A I 1025 A
20 A I 1025 A F = 50 Hz
+ 3 more
SM 5210 D
UNE-EN ISO 27888
SM 5220 D
SM 2130 B
UNE-EN ISO 11885
+ 3 more
50 ∙ 10-9 mol/mol ≤ C ≤ 237 · 10-9 mol/m
30∙ 10-9 mol/mol ≤ C ≤ 500 ∙ 10-9 mol/mo
50 ∙ 10-9 mol/mol ≤ C ≤ 1000 · 10-9 mol/
50 ∙ 10-9 mol/mol ≤ C ≤ 237∙ 10-9 mol/mo
0,5 ∙ 10-9 mol/mol ≤ C ≤ 15 ∙ 10-9 mol/m
+ 1 more
ECOS DEL PISUERGA
Active
UNE-EN ISO 16283-1
UNE-EN ISO 16283-3
UNE-EN ISO 16283-2
UNE-EN ISO 3382-1
UNE-EN ISO 3382-2
200 kg/h ≤ m ≤ 60000 kg/h
200 l/h ≤ Q ≤ 60000 l/h
200 kg/h ≤ m ≤ 30000 kg/h
200 l/h ≤ Q ≤ 30000 l/h
700 Pa ≤ P ≤ 2 MPa
+ 3 more
ENSATEC, S.L. (Unipersonal)
Active
UNE-EN 12211
UNE-EN 12210
UNE-EN 1026
UNE-EN 12207
UNE-EN 14608
+ 3 more
Environmental noise — determination of s
ISO 20906 : 2009-12 :
UNE-EN 12350-2
UNE-EN 12504-1
UNE-EN 12390-2
UNE-EN 12390-3
UNE-EN 12350-1
+ 3 more
UNE-EN ISO 16283-1
UNE-EN ISO 16283-2
UNE-EN ISO 16283-3
UNE 74201
UNE-EN ISO 3382-2
UNE-EN ISO 6892-1
DIN EN 10002-1
ASTM E 8
ASTM E 208
ASTM E208-06
+ 3 more
UNE 64106
BS ISO 6731:2010
UNE-EN ISO 712
UNE-EN ISO 5534
ISO 13580
+ 3 more
UNE EN ISO 15213-1
ISO 6888-1
ISO 7251
ISO 6888-3
ISO 4831
+ 3 more
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