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
🇳🇱
NEN EN ISO 9614-1
1,670
Accredited labs
18
Countries
Showing 276–300 of 349 labs
SGS United Kingdom
Active
MPV Thrombozytenvolume
Gas meters
Power meter method
LENGTH
Waterdraw Method
+ 3 more
SGS United Kingdom
Active
BS EN 286 - Simple unfired pressure
BS EN 13445 Unfired pressure
BS EN13480 Metallic industrial
BS EN 12953 Shell boilers
BS EN BS EN 12952 Water-tube
+ 3 more
SGS United Kingdom
Active
ISO 14184-1
ISO 14184-2
BS EN ISO 1833-1:2020
BS EN ISO 105-B02:2014
BS 4407
+ 3 more
SOCOTEC Asbestos
Active
(HSG 248) – 2021
SCI/ASB/003 based on HSG 248
(PCM) based on HSG 248
SCI/ASB/001 based on HSG 248
SOCOTEC UK
Active
DIN EN 13284-1
ENV/054 based on BS EN
ISO 11731
DIN EN 14791
IEC 60519-11
+ 3 more
Safety Advice Centre
Active
M002based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
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
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
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
Sigma-HSE (UK)
Active
DIN EN 13821
Sigma-HSE (UK) Ltd
DIN EN 14034-1
BS EN ISO/IEC 80079-20-2:2016
DIN EN 14034-2
+ 3 more
Somerset Council
Active
(HSG 248) – 2021
R24 based on HSG 248
staining based on HSG 248
Sound Solution Consultants
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
based on BS EN ISO 6579-1:
ISO 21528-2
ISO 21149:2017+Amd1:2022
DIN EN ISO 18415
method based on BS ISO 16649-2:
+ 3 more
Spectra Analysis Services
Active
QOP01 based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
(HSG 264, 2012)
Appendix 5 of HSG 227 (2004))
AM01 based on BS EN ISO 4833-1:
AM03 based on BS EN ISO 11290-
AM05 based on BS ISO 21528-2:
AM08 based on BS EN ISO 15213-2:2023 by
AM12 based on BS EN
+ 3 more
Spratt & Hamer
Active
BS EN ISO 140-4:1998
ISO 13829
BS EN ISO 717-2:2020
ISO 1407
BS EN ISO 9972:2015
+ 1 more
Springfields Fuels
Active
LMM2149, ASTM E112-13 by
ISO 6507-1
LMM2207, ASTM E112-13 by
LMM1862, ASTM E112-13 for
to BS EN ISO 6507-1:2018
+ 3 more
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