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
🇩🇪
DIN EN ISO 3746
🇬🇧
BS EN ISO 3746
🇫🇷
NF EN ISO 3746
🇮🇹
UNI EN ISO 3746
🇪🇸
UNE EN ISO 3746
🇳🇱
NEN EN ISO 3746
🇩🇪
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 376–400 of 1,670 labs
DIN 58620: 2007-02
DIN 58621: 2011-10
DIN 58647-7: 1997-12
ID136
> 140
+ 3 more
IEC 61400-12
IEC 61400-12-1
IEC 61400-12-2
IEC 61400-12-3
IEC 61400-12-5
+ 3 more
Railway brakes — conditions for homologa
− Durchfluss von Flüssigkeiten
− Strömungsgeschwindigkeit von Gasen
− Widerstandsthermometer
− Temperatur-Transmitter, Datenlogger
+ 3 more
ADP
ASPI
TRAP
Amiodaron, Desethylamiodaron
Mycophenolsäure
+ 3 more
Devonport Royal Dockyard
Active
Specific Values 1
RF Power
RF Attenuation 10 MHz to 1 GHz
Other values -20 dBm to +20 dBm
Devonport Royal Dockyard
Active
BS 4206:1967 (superseded)
ISO 5173
ISO 7438
BS EN ISO 9606-2:2004
BS 131-5:1965
+ 3 more
Diagenom
Active
Chromosomensatz (angeboren)
Chromosomensatz (erworben)
Adrenogenitales Syndrom
Angelman-Syndrom (15q11-Region, UBE3A)
Mikrodeletionen; AZFa-c)
+ 3 more
Diagnos MVZ
Active
HbA1c
Differentialblutbild, maschinell
Retikulozyten, maschinell
Kleines Blutbild
Thrombozyten
+ 3 more
Diatec Diagnostics
Active
AUDIOMETRIC EQUIPMENT
Attenuator linearity
Microphones
EAR SIMULATORS
Class LS, 1 and 2
Diehl Metering
Active
Volumen strömender 0,0005 m
− Durchfluss von Flüssigkeiten
0,025 m
Wasserzähler und 0,001 m
Durchflusssensoren
+ 3 more
Absolutdruck p *
Vickers hardness test (ISO 6507)
Flüssigkeitsvolumen *
variablem Volumen
aufnehmern sowie
+ 3 more
Staber & Kollegen
Active
Blutbild groß
Thrombozyten
Urinsediment
Natrium
Kalium
+ 3 more
Aminosäureprofil
Guanidinoacetat
Kreatin
Hämoglobinprofil
Nitisinon (NTBC), Succinylaceton
+ 3 more
Druck
Active
Gas pressure (absolute)
Hydraulic pressure (gauge)
Gas pressure (gauge)
(At low current)
Specific values (continued)
+ 3 more
Druck *
Negativer und
positiver Überdruck -0,01 bar
Positiver Überdruck p e
> 0,015 bar
+ 3 more
Duravit
Active
*6095991, BAG3 [OMIM *6038831
(-13910T>C) rs4988235
- PiM rs6647, PiZ rs28929474, rs17580
DIN EN 997
DIN EN 13407
+ 3 more
DynaGreen Environmental UK
Active
DIN EN 14791
IEC 60519-11
BS EN ISO 16911-1:2013 using
DIN EN 14792
DIN EN 13126-19
+ 3 more
VDE 0468-2-1
VDE 0468-2-2
VDE 0468-2-6
DIN EN IEC 60068-2-11
DIN EN IEC 60068-2-13
+ 3 more
optische 0 mm
Werkzeugeinstell- und
/ Messgeräte
verwendete Abkürzungen:
DIN EN ISO 17294-2
DIN EN ISO 7899-1
ISO 5815-1
NF T90-015-1
DIN EN ISO 10523
+ 3 more
ECORICERCHE SrL
Active
EPA 3535
DIN EN ISO 15587-1
NF EN ISO-15587-2
EPA 5030
EPA 6010
+ 3 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
DIN 40633-2
DIN 40633-3
DIN 53482
DIN 72551-100
DIN 72551-6
+ 3 more
No matching labs found.