Scope
ISO 3747:2010
Sound Power Level โ 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
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Chamois Metrology
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Calibration of pressure
Gas pressure (gauge)
Gas Pressure (Differential)
common mode pressure of 3.5
Hydraulic pressure (gauge)
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Liquid-in-glass thermometers
ASTM D4052 (Digital density
Cirrus Research
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Sound Calibrators
Sound Level Meters
One-third octave band filters
(HSG 248) โ 2021
SRV-002 based on HSG 248
(PCM) based on HSG 248
CoMech Metrology
Active
Chronic progressive external
Depth
Internal
Dial gauges and dial test
Caliper
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simulation.
parameters and ranges)
digital and analogue
Compli Group
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DC CURRENT
DC Resistance
Oscilloscope Calibration
DC VOLTAGE
CAPACITANCE
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BS EN ISO 16283-1:2014+A1:2017BS EN ISO
BS EN ISO 16283-2:2020
HTM 08-01 - 2013
BS EN ISO 140-4:1998
BS EN ISO 717-2:2020
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DIN EN 933-11
DIN EN 12390-3
DIN EN 933-3
DIN EN 12390-7
DIN EN 12697-5
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DC CURRENT
LENGTH
DC Resistance
DC VOLTAGE
Cold junction compensation
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Corserv Solutions
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DIN EN 933-1
(PCM) based on HSG 248
(HSG 248) โ 2021
DIN EN 932-1
DIN EN 932-2
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requirements of BS EN 15259:2007
IEC 60519-11
Based on EN 14791:2017
DIN EN 13284-1
BS EN BS EN ISO 21877:2019
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Gas pressure (absolute)
Gas pressure (gauge)
Hydraulic pressure (gauge)
Hydraulic Pressure (absolute)
PRESSURE (contโd)
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DM Calibration
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LENGTH
Blade type
Straight edges
Surface plates
External micrometer
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DNKA
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staining based on HSG 248.
(PCM) based on HSG 248
(HSG 248) โ 2021
QSOP 03 based on HSG 248
QSOP 01 based on HSG 248
Decus Research
Active
1) MS08P based on BS EN ISO
MS02P based on BS EN ISO
MS03P based on BS EN ISO
MS06P based on BS EN ISO
MF07P based on BS EN ISO
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Devonport Royal Dockyard
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Specific Values 1 ๏
RF Power
RF Attenuation 10 MHz to 1 GHz
Other values -20 dBm to +20 dBm
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