CCAUV.A-K3, COOMET.AUV.A-K3, EUROMET.AUV.A-K3,
APMP.AUV.A-K3.1, and APMP.AUV.A-K3
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in
dB re 1 V/Pa
Click on the graph below to get a closer view
Red diamonds: participants in CCAUV.A-K3
Green triangles: participants in COOMET.AUV.A-K3
Blue squares: participants in EUROMET.AUV.A-K3
Orange circle: participant in APMP.AUV.A-K3.1
Pink squares: participants in APMP.AUV.A-K3
CCAUV.A-K3, COOMET.AUV.A-K3, EUROMET.AUV.A-K3,
APMP.AUV.A-K3.1, and APMP.AUV.A-K3
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
Black: participants in CCAUV.A-K3
Green: participants in COOMET.AUV.A-K3
Blue: participants in EUROMET.AUV.A-K3
Orange: participant in APMP.AUV.A-K3.1
Pink: participants in APMP.AUV.A-K3
Lab i | Di | Ui |
/ dB | / dB | |
CENAM | 0.014 | 0.052 |
NMIA | 0.004 | 0.035 |
DPLA | -0.004 | 0.025 |
GUM | -0.016 | 0.045 |
INMETRO | 0.001 | 0.040 |
KRISS | 0.008 | 0.026 |
LNE | 0.016 | 0.026 |
NIM | -0.009 | 0.045 |
NIST | -0.001 | 0.035 |
NMIJ | -0.016 | 0.082 |
NPL | -0.006 | 0.026 |
NRC | -0.006 | 0.035 |
PTB | 0.004 | 0.035 |
UME | 0.007 | 0.073 |
VNIIFTRI | -0.016 | 0.035 |
NPLI | 0.015 | 0.073 |
GUM* | -0.010 | 0.049 |
DNDI "Systema"* | -0.040 | 0.067 |
VNIIFTRI* | 0.052 | 0.039 |
INM(RO)* | 0.018 | 0.044 |
* indicates participants in COOMET.AUV.A-K3
The pair-wise degrees of equivalence obtained inside EUROMET.AUV.A-K3 are available by clicking here.
The pair-wise degrees of equivalence obtained inside APMP.AUV.A-K3 are available in Table 11d, page 41 of the APMP.AUV.A-K3 Final Report.
These results are presented under A4 printable format in Summary Results (PDF file).
Metrology area, Sub-field | Acoustics, Ultrasound, Vibration, Acoustics |
Description | Comparison of laboratory standard microphone calibrations |
Time of measurements | 2008 |
Status | Approved for equivalence |
Final Reports of the comparisons | |
References | |
Measurand | Sound pressure |
Parameters | Frequency: 31.5 Hz to 25 kHz |
Transfer device | One LS2P microphone |
Comparison type | Key Comparison |
Consultative Committee | CCAUV (Consultative Committee for Acoustics, Ultrasound and Vibration) |
Conducted by | APMP (Asia Pacific Metrology Programme) |
Comments | Results published on 03 February 2011 COOMET.AUV.A-K3, EUROMET.AUV.A-K3, APMP.AUV.A-K3.1 and APMP.AUV.A-K3 results are linked to those of CCAUV.A-K3 Laboratory standard microphones LS2P |
Pilot institute |
NMIA
National Measurement Institute, Australia Australia |
Contact person | Prem NARANG +61 2 8467 3544 |
Pilot laboratory | |
---|---|
NMIA |
National Measurement Institute, Australia, Australia, APMP |
KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
Puslit KIM-LIPI |
Research Center for Calibration, Instrumentation and Metrology – Indonesian Institute of Sciences, Indonesia, APMP |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
CCAUV.A-K3, COOMET.AUV.A-K3, EUROMET.AUV.A-K3,
APMP.AUV.A-K3.1, and APMP.AUV.A-K3
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 kHz
For each microphone, the key comparison reference value, xR, and its associated standard uncertainty, uR, are computed as explained in sections 4.2 and 5.1 of the CCAUV.A-K3 Final Report (unit is dB re 1 V/Pa). |
The degree of equivalence of laboratory i with respect to the reference value is given by a pair of terms expressed in dB re 1 V/Pa: Di and Ui, its expanded uncertainty (k = 2). The degrees of equivalence are computed as explained in sections 4.3 and 5.2 of the CCAUV.A-K3 Final Report, and in the Final Report of the bilateral comparison DPLA-NPLI. |
The degree of equivalence between two laboratories i and j is given by a pair of terms: Dij and Uij, its expanded uncertainty (k = 2), both expressed in dB re 1 V/Pa. The computation of these two terms is explained in section 5.3 of the CCAUV.A-K3 Final Report, and in the Final Report of the bilateral comparison DPLA-NPLI. |
DPLA provides the link between key comparisons CCAUV.A-K3 and COOMET.AUV.A-K3. The linkage process is described in section 5 of the COOMET.AUV.A-K3 Final Report.
The degree of equivalence of laboratory i participant in COOMET.AUV.A-K3 with respect to the key comparison reference value is given by a pair of terms expressed in dB re 1 V/Pa: Di and Ui, its expanded uncertainty (k = 2). The degrees of equivalence are computed as explained in section 5 of the COOMET.AUV.A-K3 Final Report. |
The degree of equivalence between two laboratories i and j is given by a pair of terms: Dij and Uij, its expanded uncertainty (k = 2), both expressed in dB re 1 V/Pa. |
DPLA provides the link between key comparisons CCAUV.A-K3 and EUROMET.AUV.A-K3. The linkage process is described in section 6 of the EUROMET.AUV.A-K3 Final Report.
The degree of equivalence of laboratory i participant in EUROMET.AUV.A-K3 with respect to the key comparison reference value is given by a pair of terms expressed in dB re 1 V/Pa: Di and Ui, its expanded uncertainty (k = 2). The degrees of equivalence are computed as explained in section 6 of the EUROMET.AUV.A-K3 Final Report. |
The degree of equivalence between two laboratories i and j is given by a pair of terms: Dij and Uij, its expanded uncertainty (k = 2), both expressed in dB re 1 V/Pa. |
KRISS provides the link between key comparisons CCAUV.A-K3 and APMP.AUV.A-K3.1. The linkage process is described in section 8 of the APMP.AUV.A-K3.1 Final Report.
The degree of equivalence of KIM-LIPI participant in APMP.AUV.A-K3.1 with respect to the key comparison reference value is given by a pair of terms expressed in dB re 1 V/Pa: Di and Ui, its expanded uncertainty (k = 2). The degrees of equivalence are computed as explained in section 8 of the APMP.AUV.A-K3.1 Final Report. |
No pair-wise degrees of equivalence between KIM-LIPI and other participants in CCAUV.A-K3 have been computed. |
NMIJ, KRISS, NIM, and NMIA provide the link between key comparisons CCAUV.A-K3 and APMP.AUV.A-K3. The linkage process is described in section 6 of the APMP.AUV.A-K3 Final Report.
The degree of equivalence of laboratory i participant in APMP.AUV.A-K3 with respect to the key comparison reference value is given by a pair of terms expressed in dB re 1 V/Pa: Di and Ui, its expanded uncertainty (k = 2). The degrees of equivalence are computed as explained in section 6 of the APMP.AUV.A-K3 Final Report. |
The degree of equivalence between two laboratories i and j is given by a pair of terms: Dij and Uij, its expanded uncertainty (k = 2), both expressed in dB re 1 V/Pa. |
CCAUV.A-K3, COOMET.AUV.A-K3, EUROMET.AUV.A-K3,
APMP.AUV.A-K3.1, and APMP.AUV.A-K3
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
xi : result of measurements carried out by laboratory i (unit is dB re 1 V/Pa)
Results from LNE, NIM and INMETRO have been corrected for nominal frequencies as described in section 3.2 of the Final Report.
ui : combined standard uncertainty of xi
Microphone: 1395456
Lab i
xi
/ dB2ui
/ dB
CENAM
-38.43
0.06
DPLA
-38.459
0.03
GUM
-38.46
0.05
KRISS
-38.441
0.03
LNE
-38.436
0.030
NIST
-38.454
0.04
NMIJ
-38.47
0.09
NPL
-38.46
0.03
PTB
-38.45
0.04
Microphone: 1627783
Lab i
xi
/ dB2ui
/ dB
CENAM
-38.76
0.06
DPLA
-38.771
0.03
GUM
-38.79
0.05
KRISS
-38.760
0.03
LNE
-38.750
0.030
NIST
-38.765
0.04
NMIJ
-38.78
0.09
NPL
-38.77
0.03
PTB
-38.76
0.04
Microphone: 1124046
Lab i | xi / dB |
2ui / dB |
CENAM | -38.076 | 0.06 |
NMIA | -38.10 | 0.04 |
DPLA | -38.103 | 0.03 |
INMETRO | -38.103 | 0.045 |
NIM | -38.112 | 0.05 |
NRC | -38.109 | 0.04 |
UME | -38.098 | 0.08 |
VNIIFTRI | -38.12 | 0.04 |
DPLA* |
-38.114 |
0.03 |
NPLI* |
-38.100 |
0.10 |
Microphone: 1395455
Lab i | xi / dB |
2ui / dB |
CENAM | -38.404 | 0.06 |
NMIA | -38.40 | 0.04 |
DPLA | -38.409 | 0.03 |
INMETRO | -38.404 | 0.045 |
NIM | -38.414 | 0.05 |
NRC | -38.411 | 0.04 |
UME | -38.397 | 0.08 |
VNIIFTRI | -38.42 | 0.04 |
DPLA* |
-38.403 |
0.03
NPLI*-38.380
0.10
*participants in the bilateral comparison DPLA-NPLI, conducted as an extension of key comparison CCAUV.A-K3
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
xi-COO : result of measurements carried out by laboratory i participant in the key comparison COOMET.AUV.A-K3; unit is dB re 1 V/Pa
ui-COO : combined standard uncertainty of xi-COO
A sudden change in sensitivity of microphone 1503926 occured during the comparison.
Microphone: 1503926 (before change in sensitivity)
Lab i
xi-COO
/ dB2ui-COO
/ dB
DPLA
-38.918
0.03
GUM
-38.920
0.05
DNDI "Systema"
-38.950
0.07
Microphone: 1503926 (after change in sensitivity)
Lab i
xi-COO
/ dB2ui-COO
/ dB
DPLA
-38.851
0.03
VNIIFTRI
-38.812
0.04
INM(RO)
-38.843
0.046
Microphone: 1503933
Lab i
xi-COO
/ dB2ui -COO
/ dB
DPLA
-38.960
0.03
GUM
-38.97
0.05
DNDI "Systema"
-39.00
0.07
VNIIFTRI
-38.882
0.04
INM(RO)
-38.938
0.046
Microphone: 1526170
Lab i
xi-COO
/ dB2ui-COO
/ dB
DPLA
-38.855
0.03
VNIIFTRI
-38.807
0.04
INM(RO)
-38.820
0.046
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
xi-EUR : result of measurements carried out by laboratory i participant in the key comparison EUROMET.AUV.A-K3; unit is dB re 1 V/Pa
ui-EUR : combined standard uncertainty of xi-EUR
Microphone: 1395456
Lab i
xi-EUR
/ dB2ui-EUR
/ dB
DPLA
-38.450
0.03
INRIM
-38.430
0.05
BEV
-38.434
0.02
CMI
-38.480
0.06
METAS
-38.430
0.036
CEM
-38.449
0.04
MIKES
-38.431
0.0259
SP
-38.429
0.05
Microphone: 1627783
Lab i
xi-EUR
/ dB2ui-EUR
/ dB
DPLA
-38.767
0.03
INRIM
-38.740
0.05
BEV
-38.763
0.02
CMI
-38.810
0.06
METAS
-38.743
0.036
CEM
-38.782
0.04
MIKES
-38.760
0.0258
SP
-38.744
0.05
Date of measurement
Lab i
DPLA
15 Oct 03
INRIM
05 Nov 03
BEV
20 Nov 03
CMI
03 Dec 03
METAS
15 Jan 04
CEM
01 Mar 04
MIKES
29 Mar 04
SP
28 Apr 04
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
xi-APMP(K3.1) : result of measurements carried out by laboratory i participant in the key comparison APMP.AUV.A-K3.1; unit is dB re 1 V/Pa
Ui-APMP(K3.1) : expanded uncertainty (k = 2) of xi-APMP(K3.1)
Microphone: 2341431
Lab i Ui-APMP(K3.1)
xi-APMP(K3.1)
/ dB
/ dB
KRISS
-38.74
0.04
KIM-LIPI
-38.75
0.06
MEASURAND : Pressure sensitivity level of laboratory standard microphone type LS2P
FREQUENCY : 250 Hz
xi-APMP(K3) : result of measurements carried out by laboratory i participant in the key comparison APMP.AUV.A-K3; unit is dB re 1 V/Pa
Ui-APMP(K3) : expanded uncertainty (k = 2) of xi-APMP(K3)
Microphone: 1763688
The measurement results reported by the participants can be found in Table 2a and 3 of the APMP.AUV.A-K3 Final Report.
Microphone: 2341431
The measurement results reported by the participants can be found in Table 2b and 3 of the APMP.AUV.A-K3 Final Report.