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
🇮🇹
UNI EN ISO 3746
🇪🇸
UNE EN ISO 3746
🇳🇱
NEN EN ISO 3746
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DIN EN ISO 9614-1
🇬🇧
BS EN ISO 9614-1
🇫🇷
NF EN ISO 9614-1
🇮🇹
UNI EN ISO 9614-1
🇪🇸
UNE EN ISO 9614-1
🇳🇱
NEN EN ISO 9614-1
1,670
Accredited labs
18
Countries
Showing 901–925 of 1,670 labs
(ein- und mehrgängige
zylindrische Außen- und
symmetrischem und
unsymmetrischem Profil)
Außengewinde
+ 3 more
DIN EN 60601-2-4
IEC 60512-4-1
DIN EN 124-2
IEC 60512-4-3
DIN EN 60601-2-44
+ 3 more
Life Environmental Services
Active
(HSG 248) – 2021
QSOP 01 based on HSG 248
(PCM) based on HSG 248
QSOP 03 based on HSG 248
Aluminium
Blei
Eisen, Kupfer
Ampicillin
Cefepim
+ 3 more
anteile
Kohlenstoffmonoxid
Kohlenstoffdioxid
Methan
Ethan
+ 3 more
accordance with (EN ISO 14644-
BS EN ISO 14644-1:2015
London Borough of Enfield
Active
staining based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
London Laboratories
Active
(HSG 248) – 2021
ASB04 based on HSG 248
(PCM) based on HSG 248
Lucion Services
Active
staining based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
3492, ISO14966 and HSG 248
DIN EN 14629
+ 3 more
Ludwig Schneider Messtechnik
Active
Taupunkttemperatur
Fixpunktzellen *)
thermometer (SPRT) *)
meter, direkt anzeigende
thermometer und
+ 3 more
Cryptococcus neoformans
Cardiolipin AK
Escherichia coli K1-AG
Haemophilus influenzae
Metromec Software AG
+ 3 more
M E Broadstone Limited
Active
Plain ring gauges (taper)
Plain gap gauges (parallel)
Plain plug gauges (taper)
LENGTH
ANGLE
+ 3 more
MAPE - Métier Environnement
Active
NF X43-551
ETSI EN 301 489-1 V2.2.3 2019-11
NF X 44-052
DIN EN 13284-1
DIN EN 14385
+ 3 more
MAPE - Métier Environnement
Active
DIN EN 14385
NF X43-551
ETSI EN 301 489-1 V2.2.3 2019-11
IS EN 1948-1:2006 2006
DIN EN 14789
+ 3 more
UNE-EN ISO 16283-1
UNE-EN ISO 16283-2
UNE-EN ISO 16283-3
UNE-EN ISO 140-7
UNE-EN ISO 140-4
+ 2 more
MATED
Active
DIN EN 13180
ISO 11357-1
DIN EN IEC 62631-3-1
DIN EN IEC 62631-3-2
DIN EN IEC 60068-2-11
+ 3 more
MBS
Active
DIN EN ISO 16484-5
DIN EN ISO 16484-6
IEC 62386-101
IEC 62386-102
IEC 62386-103
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MCV
Active
0,005 l/min ≤ Q ≤ 50 l/min
0,5 m3/h≤ Q ≤ 2,8 m3/h
0,6 m3/h Q 2,8 m3/h
20 m3/h Q 30 m3/h
30 m3/h < Q 70 m3/h
+ 3 more
DIN EN 13018
DIN EN 50289-1-2
DIN EN 50289-1-3
DIN EN 50289-1-4
DIN EN 50289-1-5
+ 3 more
MDI Limbach Berlin
Active
17-OH-Carbazepin
Amiodaron, Desmethylamiodaron
Amitriptylin
Clobazam
Clomipramin
+ 3 more
ME-Meßsysteme
Active
Kraft 50 N
Sound power — survey method (ISO 3746)
> 200 N
Railway brake — automatic variable load
0,2 kN
+ 1 more
Temperaturmessgrößen
auch direktanzeigend 35 °C
direktanzeigende > 200 °C
auch direktanzeigend
Temperaturmessgrößen −35 °C
+ 3 more
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