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
20
Countries
Showing 1,426–1,450 of 1,868 labs
SYNLAB Medizinisches Versorgungszentrum Weiden GmbH Medizinisches Versorgungszentrum Thüringen
Active
5-Fluorouracil Unverträglichkeit:
DPD Mutationen Exon 14 c.1905+1
G>A rs3918290, Exon 11 c.1236G>A
rs56038477, Exon 13 c.1679T>G
rs55886062, Exon 22 c.2846A>T
+ 3 more
Safe Gas Cylinders
Active
BS EN 1440:2016 + A1:2018 +
EN ISO 23088:2020
Cylinders EN ISO 10460:2018
EN 14208:2004
Safety Advice Centre
Active
M002based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
Saliger Gruppe
Active
Parallelendmaße 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße aus
Wolframkarbid nach
Parallelendmaße aus 0,5 mm
+ 3 more
EPA 8015
EPA 3511 2014
EPA 8260
EPA 6020
BS EN ISO 17294-2
+ 3 more
DIN EN ISO 16283-1
DIN EN ISO 16283-3
DIN EN ISO 16032
DIN EN ISO 10052
DIN EN ISO 3382-3
+ 3 more
Schütz + Licht Prüftechnik
Active
Kraft (WPM)
Werkstoffprüfmaschinen
Acoustics — tonality assessment (DIN 456
Länge (WPM)
messeinrichtungen von
+ 3 more
Scientific Services
Active
(HSG 248) – 2021
D3TA2 based on HSG 248
(PCM) based on HSG 248
D3TA8 based on HSG 248
Scopus Asbestos Compliance
Active
(HSG 248) – 2021
SAC-SOP-15 based on HSG 248
SAC-SOP-07 based on HSG 248
staining based on HSG 248
ETSI EN 319 412
ETSI EN 319 401
ETSI EN 319 411-2
ETSI EN 319 411-1
Sedus Stoll
Active
DIN ISO 14573
ISO 21527-1
DIN EN 12102-2
DIN EN 1335-1
DIN EN 1728
+ 3 more
SembCorp Utilities (UK)
Active
(HSG 248) – 2021
DI/AN/ME/025 based on HSG 248
DI/AN/ME/001 based on HSG 248
DI/AN/ME/026 based on HSG 248
(PCM) based on HSG 248
ServiceCal
Active
PRESSURE (cont’d)
DC CURRENT
DC VOLTAGE
CFH-Gen, Macula-Degeneration
Measurement
+ 3 more
Sharps Redmore Partnership
Active
BS EN ISO 16283-1:2014+A1:2017BS EN ISO
BS EN ISO 16283-2:2020
BS EN ISO 140-4:1998
BS EN ISO 717-2:2020
ISO 1407
+ 1 more
LENGTH
Plain plug gauges (parallel)
Internal
Caliper
LENGTH (cont’d)
+ 3 more
DIN EN ISO 12185
ASTM D 4052
DIN EN ISO 3405
DIN EN 13016-1
DIN EN 13016-2
+ 3 more
Shell Nederland Raffinaderij
Active
ISO 10370
DIN EN ISO 5163
IP 411, ISO 6251
ISO 3405
NEN 6646
+ 3 more
Shirley Technologies
Active
ASTM E 2149-20
BS EN ISO 20743:2021 Section
ISO 14119
BS EN ISO 20645:2004
BS 1425-1:1991 Appendix A
+ 3 more
ISO 37
ISO 8513
DIN EN 1393
ISO 21527-2
DIN EN ISO 527-4
+ 3 more
Thermodynamische Messgrößen
Temperaturmessgrößen
- Direktanzeigende Thermometer
Railway brake handbooks (UIC 547)
- Thermopaare, Thermoelemente
+ 3 more
Gleichspannung /
Sound power — survey method (ISO 3746)
Quellen
Wechselspannung /
Gleichstromstärke /
+ 3 more
DIN 45641
DIN 45630-1
DIN 45635-1
DIN 45635-14
DIN ISO 10494
+ 3 more
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