CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 250 Hz

Degrees of equivalence D_i and expanded uncertainty U_i (k = 2) expressed in dB
The horizontal continuous line crosses the y-axis at the value 0 dB

Click on the graph for a closer view

Red diamonds : CCAUV.A-K1 participants
Green triangles : EUROMET.AUV.A-K1 participants only
Blue squares : APMP.AUV.A-K1 participants only
Black circles : SIM.AUV.A-K1 participants only
Orange square : APMP.AUV.A-K1.1 participant only
Pink circles : COOMET.AUV.A-K1 participants only
Grey triangle : COOMET.AUV.A-K1.1 participant only

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 1000 Hz

Degrees of equivalence D_i and expanded uncertainty U_i (k = 2) expressed in dB
The horizontal continuous line crosses the y-axis at the value 0 dB

Click on the graph for a closer view

Red diamonds : CCAUV.A-K1 participants
Green triangles : EUROMET.AUV.A-K1 participants only
Blue squares : APMP.AUV.A-K1 participants only
Black circles : SIM.AUV.A-K1 participants only
Orange square : APMP.AUV.A-K1.1 participant only
Pink circles : COOMET.AUV.A-K1 participants only
Grey triangle : COOMET.AUV.A-K1.1 participant only

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 250 Hz

Degrees of equivalence relative to the CCAUV.A-K1 key comparison reference value, expressed in dB

In dark blue : CCAUV.A-K1 participants
In green : EUROMET.AUV.A-K1 participants only
In blue : APMP.AUV.A-K1 participants only
In black : SIM.AUV.A-K1 participants only
In orange : APMP.AUV.A-K1.1 participant only
In pink : COOMET.AUV.A-K1 participants only
In grey : COOMET.AUV.A-K1.1 participant only

The pair-wise degrees of equivalence are given in the yellow part of the matrix presented below. All values are expressed in dB.

* EUROMET.AUV.A-K1 participants only
** APMP.AUV.A-K1 participants only
*** SIM.AUV.A-K1 participants only
**** APMP.AUV.A-K1.1 participant only
^ COOMET.AUV.A-K1 participants only
^^ COOMET.AUV.A-K1.1 participant only

Results are presented under A4 printable format in Summary Results (.PDF file).

Data obtained at 250 Hz is characteristic of frequencies up to 2 kHz.

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 1000 Hz

Degrees of equivalence relative to the CCAUV.A-K1 key comparison reference values, expressed in dB

In dark blue : CCAUV.A-K1 participants
In green : EUROMET.AUV.A-K1 participants only
In blue : APMP.AUV.A-K1 participants only
In black : SIM.AUV.A-K1 participants only
In orange : APMP.AUV.A-K1.1 participant only
In pink : COOMET.AUV.A-K1 participants only
In grey : COOMET.AUV.A-K1.1 participants only

Results are presented under A4 printable format in Summary Results (.PDF file).

The pair-wise degrees of equivalence are computed only for frequency 250 Hz. This data is characteristic of frequencies up to 2 kHz.

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 63 Hz to 8 kHz

Degrees of equivalence D_i and expanded uncertainty U_i (k = 2) expressed in dB

In dark blue : CCAUV.A-K1 participants
In green : EUROMET.AUV.A-K1 participants only
In blue : APMP.AUV.A-K1 participants only
In black : SIM.AUV.A-K1 participants only
In orange : APMP.AUV.A-K1.1 participant only
In pink : COOMET.AUV.A-K1 participants only
In grey : COOMET.AUV.A-K1.1 participant only

Results are presented under A4 printable format in Summary Results (.PDF file).

The pair-wise degrees of equivalence are computed only for frequency 250 Hz. This data is characteristic of frequencies up to 2 kHz.

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 250 Hz

• Key comparison CCAUV.A-K1

• Linking key comparison EUROMET.AUV.A-K1

NPL, DPLA and PTB provide the link between key comparisons CCAUV.A-K1 and EUROMET.AUV.A-K1.
The process involves calculating the average result of the linking participants in each comparison. The difference between the average result relative to the CCAUV.A-K1 key comparison reference value and relative to the EUROMET.AUV.A-K1 internal reference provides a linking factor, d_EUR, which is used to convert the results relative to the EUROMET internal reference, so they become relative to the CCAUV.A-K1 key comparison reference value.

• Linking key comparison APMP.AUV.A-K1

NMIJ and KRISS provide the link between key comparisons CCAUV.A-K1 and APMP.AUV.A-K1. NMIA also took part in both key comparisons, but was not included as a linking laboratory because it used different equipments.
The process involves calculating the average result of the linking participants in each comparison. The difference between the average result relative to the CCAUV.A-K1 key comparison reference value and relative to the APMP.AUV.A-K1 internal reference provides a linking factor, d_APMP, which is used to convert the results relative to the APMP internal reference, so they become relative to the CCAUV.A-K1 key comparison reference value.

• Linking key comparison SIM.AUV.A-K1

NRC, NIST and CENAM provide the link between key comparisons CCAUV.A-K1 and SIM.AUV.A-K1, which is computed using a generalized linear least-squares method, as explained in Annex B on page 19 of the SIM.AUV.A-K1 Final Report.

• Linking key comparison APMP.AUV.A-K1.1

KRISS provides the link between key comparisons CCAUV.A-K1 and APMP.AUV.A-K1.1. The linking process is explained in section 8 of the APMP.AUV.A-K1.1 Final Report.

• Linking key comparison COOMET.AUV.A-K1

GUM, PTB and VNIIFTRI provide the link between key comparisons CCAUV.A-K1 and COOMET.AUV.A-K1. The linking process is explained in section 6 of the COOMET.AUV.A-K1 Final Report.

• Linking key comparison COOMET.AUV.A-K1.1

PTB provides the link between key comparisons CCAUV.A-K1 and COOMET.AUV.A-K1.1. The linking process is explained in section 6 of the COOMET.AUV.A-K1.1 Final Report.

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 1000 Hz

• Key comparison CCAUV.A-K1

• Linking key comparison EUROMET.AUV.A-K1

NPL, DPLA and PTB provide the link between key comparisons CCAUV.A-K1 and EUROMET.AUV.A-K1.
The process involves calculating the average result of the linking participants in each comparison. The difference between the average result relative to the CCAUV.A-K1 key comparison reference value and relative to the EUROMET.AUV.A-K1 internal reference provides a linking factor, d_EUR, which is used to convert the results relative to the EUROMET internal reference, so they become relative to the CCAUV.A-K1 key comparison reference value.

• Linking key comparison APMP.AUV.A-K1

NMIJ and KRISS provide the link between key comparisons CCAUV.A-K1 and APMP.AUV.A-K1. NMIA also took part in both key comparisons, but was not included as a linking laboratory because it used different equipments.
The process involves calculating the average result of the linking participants in each comparison. The difference between the average result relative to the CCAUV.A-K1 key comparison reference value and relative to the APMP.AUV.A-K1 internal reference provides a linking factor, d_APMP, which is used to convert the results relative to the APMP internal reference, so they become relative to the CCAUV.A-K1 key comparison reference value.

• Linking key comparison SIM.AUV.A-K1

NRC, NIST and CENAM provide the link between key comparisons CCAUV.A-K1 and SIM.AUV.A-K1, which is computed using a generalized linear least-squares method, as explained in Annex B on page 19 of the SIM.AUV.A-K1 Final Report.

• Linking key comparison APMP.AUV.A-K1.1

KRISS provides the link between key comparisons CCAUV.A-K1 and APMP.AUV.A-K1.1. The linking process is explained in section 8 of the APMP.AUV.A-K1.1 Final Report.

• Linking key comparison COOMET.AUV.A-K1

GUM, PTB and VNIIFTRI provide the link between key comparisons CCAUV.A-K1 and COOMET.AUV.A-K1. The linking process is explained in section 6 of the COOMET.AUV.A-K1 Final Report.

• Linking key comparison COOMET.AUV.A-K1.1

PTB provides the link between key comparisons CCAUV.A-K1 and COOMET.AUV.A-K1.1. The linking process is explained in section 6 of the COOMET.AUV.A-K1.1 Final Report.

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 63 Hz to 8 kHz

• Key comparison CCAUV.A-K1

• Linking key comparison EUROMET.AUV.A-K1

NPL, DPLA and PTB provide the link between key comparisons CCAUV.A-K1 and EUROMET.AUV.A-K1.
The process involves calculating the average result of the linking participants at each frequency, in each comparison. The difference between the average result relative to the CCAUV.A-K1 key comparison reference value and relative to the EUROMET.AUV.A-K1 internal reference provides a linking factor, d, which is used to convert the results relative to the EUROMET internal reference, so they become relative to the CCAUV.A-K1 key comparison reference value.

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 250 Hz

• Key comparison CCAUV.A-K1

x_i : result of measurements carried out by laboratory i (designated as M_i in the CCAUV.A-K1 Final Report)
The quoted pressure sensitivity levels are the mean of measurements on two microphones, relative to the arithmetic mean value of all such measurement made in this key comparison.
The nominal value is therefore 0 dB, the key comparison reference value (see the equivalence statements).

u_i : combined standard uncertainty of x_i
The uncertainty quoted in the following table is 2u_i, so that it can be given at a resolution consistent with the measured data.

Lab i	xi / dB	2ui / dB
NPL	0.01	0.03
CENAM	0.00	0.04
CSIR-NML	0.02	0.05
NMIA	0.02	0.04
DPLA	0.00	0.03
NMIJ	-0.01	0.04
GUM	0.01	0.03
KRISS	0.00	0.03
NIST	-0.01	0.04
NRC	-0.04	0.03
PTB	0.01	0.03
VNIIFTRI	0.00	0.05

• Key comparison EUROMET.AUV.A-K1

x_i-EUR : result of measurements carried out by laboratory i (designated as M_i in the EUROMET.AUV.A-K1 Final Report)
The quoted pressure sensitivity levels are relative to internal EUROMET reference values, computed as explained on page 3 of the EUROMET.AUV.A-K1 Final Report for each frequency, so the nominal value is 0 dB by design.

u_i-EUR : combined standard uncertainty of x_i-EUR
The uncertainty quoted in the following table is 2u_i-EUR, so that it can be given at a resolution consistent with the measured data.

Lab i	xi-EUR / dB	2ui-EUR / dB
NPL	0.00	0.03
DPLA	-0.01	0.03
BEV	-0.01	0.03
SP	0.01	0.04
IEN	-0.01	0.05
PTB	0.02	0.03
UME	0.03	0.05
METAS	-0.01	0.03
SMU	0.01	0.04
OMH	0.04	0.07
CMI	-0.04	0.03

• Key comparison APMP.AUV.A-K1

x_i-APMP : result of measurements carried out by laboratory i
The quoted pressure sensitivity levels are relative to internal APMP reference values, computed as explained on page 16 of the APMP.AUV.A-K1 Final Report for each frequency, so the nominal value is 0 dB by design.

u_i-APMP : combined standard uncertainty of x_i-APMP
The uncertainty quoted in the following table is 2u_i-APMP, so that it can be given at a resolution consistent with the measured data.

Lab i	xi-APMP / dB	2ui-APMP / dB
CMS/ITRI	0.02	0.04
KRISS	0.00	0.03
NIM	-0.01	0.05
NIMT	0.00	0.04
NMIA	0.00	0.04
NML-SIRIM	0.00	0.03
NPLI	-0.01	0.07
SCL	0.00	0.04
NMIJ	0.00	0.04

• Key comparison SIM.AUV.A-K1

x_i-SIM : result of measurements carried out by laboratory i
The quoted pressure sensitivity levels are relative to internal SIM reference values, obtained as the arithmetic mean of all measurements available for each microphone, see on page 12 of the SIM.AUV.A-K1 Final Report, so the nominal value is 0 dB by design.

u_i-SIM : combined standard uncertainty of x_i-SIM

The transfer standards were calibrated by the pilot laboratory, NRC, before delivery and after return from a participating laboratory.

Microphone serial number 907045

Lab i	xi-SIM / dB	ui-SIM / dB
NRC	0.01	0.01
NIST	-0.01	0.02
NRC	0.02	0.01
CENAM	0.03	0.02
NRC	0.01	0.01
INMETRO	-0.04	0.025
NRC	0.00	0.01
INTI	-0.02	0.025
NRC	0.00	0.01

Microphone serial number 1734004

Lab i	xi-SIM / dB	ui-SIM / dB
NRC	0.00	0.01
NIST	0.00	0.02
NRC	0.01	0.01
CENAM	0.01	0.02
NRC	0.00	0.01
INMETRO	-0.02	0.025
NRC	0.00	0.01
INTI	0.01	0.025
NRC	0.00	0.01

• Key comparison APMP.AUV.A-K1.1

x_{KIM-LIPI(APMP-K1.1)}: result of measurements carried out by KIM-LIPI obtained as the difference between KRISS and KIM-LIPI as explained in section 8 of the APMP.AUV.A-K1.1 Final Report.

U_{KIM-LIPI(APMP-K1.1)} : expanded uncertainty of x_{KIM-LIPI(APMP-K1.1)}

x_{KIM-LIPI(APMP-K1.1)} = 0.01 dB
U_{KIM-LIPI(APMP-K1.1)} = 0.08 dB

• Key comparison COOMET.AUV.A-K1

x_i-COO : result of measurements carried out by laboratory i participant in COOMET.AUV.A-K1
u_i-COO : combined standard uncertainty of x_i-COO

Microphone 4160.2302519

Lab i	xi-COO / dB	2ui-COO / dB
PTB	-26.93	0.03
GUM	-26.95	0.03
UME	-26.94	0.06
SMU	-26.95	0.04
VNIIFTRI	-26.98	0.04

Microphone 4160.2302521

Lab i

x i-COO / dB

2ui-COO / dB

 PTB -26.92 0.03  GUM -26.94 0.03  UME -26.93 0.06  SMU -26.94 0.04  VNIIFTRI -26.96 0.04

• Key comparison COOMET.AUV.A-K1.1

x_i-COO.1 : result of measurements carried out by laboratory i participant in COOMET.AUV.A-K1.1
u_i-COO.1 : combined standard uncertainty of x_i-COO.1

Microphone 4160.2302520

Lab i

x i-COO.1 / dB

2ui-COO.1 / dB

 PTB -26.95 0.03  DNDI -26.95 0.05

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 1000 Hz

• Key comparison CCAUV.A-K1

x_i : result of measurements carried out by laboratory i (designated as M_i in the CCAUV.A-K1 Final Report)
The quoted pressure sensitivity levels are the mean of measurements on two microphones, relative to the arithmetic mean value of all such measurement made in this key comparison.
The nominal value is therefore 0 dB, the key comparison reference value (see the equivalence statements).

u_i : combined standard uncertainty of x_i
The uncertainty quoted in the following table is 2u_i, so that it can be given at a resolution consistent with the measured data.

Lab i	xi / dB	2ui / dB
NPL	0.01	0.03
CENAM	0.00	0.03
CSIR-NML	0.02	0.05
NMIA	0.01	0.04
DPLA	0.00	0.03
NMIJ	-0.01	0.04
GUM	0.00	0.03
KRISS	0.00	0.03
NIST	-0.02	0.04
NRC	-0.03	0.04
PTB	0.01	0.03
VNIIFTRI	0.00	0.05

• Key comparison EUROMET.AUV.A-K1

x_i-EUR : result of measurements carried out by laboratory i (designated as M_i in the EUROMET.AUV.A-K1 Final Report)
The quoted pressure sensitivity levels are relative to internal EUROMET reference values, computed as explained on page 3 of the EUROMET.AUV.A-K1 Final Report for each frequency, so the nominal value is 0 dB by design.

u_i-EUR : combined standard uncertainty of x_i-EUR
The uncertainty quoted in the following table is 2u_i-EUR, so that it can be given at a resolution consistent with the measured data.

Lab i	xi-EUR / dB	2ui-EUR / dB
NPL	0.00	0.03
DPLA	-0.01	0.03
BEV	-0.01	0.03
SP	0.01	0.04
IEN	-0.02	0.05
PTB	0.01	0.03
UME	0.05	0.05
METAS	-0.02	0.03
SMU	0.01	0.04
OMH	0.00	0.07
CMI	-0.04	0.03

• Key comparison APMP.AUV.A-K1

x_i-APMP : result of measurements carried out by laboratory i
The quoted pressure sensitivity levels are relative to internal APMP reference values, computed as explained on page 16 of the APMP.AUV.A-K1 Final Report for each frequency, so the nominal value is 0 dB by design.

u_i-APMP : combined standard uncertainty of x_i-APMP
The uncertainty quoted in the following table is 2u_i-APMP, so that it can be given at a resolution consistent with the measured data.

Lab i	xi-APMP / dB	2ui-APMP / dB
CMS/ITRI	0.01	0.04
KRISS	0.00	0.03
NIM	-0.01	0.05
NIMT	0.01	0.04
NMIA	0.01	0.04
NML-SIRIM	0.01	0.03
NPLI	-0.01	0.07
SCL	0.00	0.04
NMIJ	-0.01	0.04

• Key comparison SIM.AUV.A-K1

x_i-SIM : result of measurements carried out by laboratory i
The quoted pressure sensitivity levels are relative to internal SIM reference values, obtained as the arithmetic mean of all measurements available for each microphone, see on page 12 of the SIM.AUV.A-K1 Final Report, so the nominal value is 0 dB by design.

u_i-SIM : combined standard uncertainty of x_i-SIM

The transfer standards were calibrated by the pilot laboratory, NRC, before delivery and after return from a participating laboratory.

Microphone serial number 907045

Lab i	xi-SIM / dB	ui-SIM / dB
NRC	0.02	0.02
NIST	-0.02	0.02
NRC	0.02	0.02
CENAM	0.03	0.025
NRC	0.01	0.02
INMETRO	-0.05	0.025
NRC	0.01	0.02
INTI	-0.01	0.025
NRC	0.00	0.02

Microphone serial number 1734004

Lab i	xi-SIM / dB	ui-SIM / dB
NRC	0.00	0.02
NIST	-0.02	0.02
NRC	0.01	0.02
CENAM	0.00	0.025
NRC	0.00	0.02
INMETRO	0.00	0.025
NRC	0.00	0.02
INTI	0.01	0.025
NRC	0.00	0.02

• Key comparison APMP.AUV.A-K1.1

x_{KIM-LIPI(APMP-K1.1)}: result of measurements carried out by KIM-LIPI obtained as the difference between KRISS and KIM-LIPI as explained in section 8 of the APMP.AUV.A-K1.1 Final Report.

U_{KIM-LIPI(APMP-K1.1)} : expanded uncertainty of x_{KIM-LIPI(APMP-K1.1)}

x_{KIM-LIPI(APMP-K1.1)} = 0.01 dB
U_{KIM-LIPI(APMP-K1.1)} = 0.07 dB

• Key comparison COOMET.AUV.A-K1

x_i-COO : result of measurements carried out by laboratory i participant in COOMET.AUV.A-K1
u_i-COO : combined standard uncertainty of x_i-COO

Microphone 4160.2302519

Lab i	xi-COO / dB	2ui-COO / dB
PTB	-26.92	0.03
GUM	-26.95	0.03
UME	-26.93	0.06
SMU	-26.93	0.04
VNIIFTRI	-26.96	0.04

Microphone 4160.2302521

Lab i

x i-COO / dB

2ui-COO / dB

 PTB -26.90 0.03  GUM -26.93 0.03  UME -26.90 0.06  SMU -26.91 0.04  VNIIFTRI -26.93 0.04

• Key comparison COOMET.AUV.A-K1.1

x_i-COO.1 : result of measurements carried out by laboratory i participant in COOMET.AUV.A-K1.1
u_i-COO.1 : combined standard uncertainty of x_i-COO.1

Microphone 4160.2302520

Lab i

x i-COO.1 / dB

2ui-COO.1 / dB

 PTB -26.93 0.03  DNDI -26.94 0.04

CCAUV.A-K1, EUROMET.AUV.A-K1, APMP.AUV.A-K1, SIM.AUV.A-K1, APMP.AUV.A-K1.1, COOMET.AUV.A-K1, and COOMET.AUV.A-K1.1

MEASURAND : Pressure sensitivity level of LS1P laboratory standard microphones
NOMINAL VALUE : 0 dB

FREQUENCY : 63 Hz to 8 kHz

• Key comparison CCAUV.A-K1

x_i : result of measurements carried out by laboratory i (designated as M_i in the CCAUV.A-K1 Final Report)
The quoted pressure sensitivity levels are the mean of measurements on two microphones, relative to the arithmetic mean value of all such measurement made in this key comparison.
The nominal value is therefore 0 dB, the key comparison reference value (see the equivalence statements).

u_i : combined standard uncertainty of x_i
The uncertainty quoted in the following table is 2u_i, so that it can be given at a resolution consistent with the measured data.

Click on the following links to access CCAUV.A-K1 data obtained:
- from 63 Hz to 2000 Hz, and
- from 2500 Hz to 8000 Hz.

• Key comparison EUROMET.AUV.A-K1

x_i-EUR : result of measurements carried out by laboratory i (designated as M_i in the EUROMET.AUV.A-K1 Final Report)
The quoted pressure sensitivity levels are relative to internal EUROMET reference values, computed as explained on page 3 of the EUROMET.AUV.A-K1 Final Report for each frequency, so the nominal value is 0 dB by design.

u_i-EUR : combined standard uncertainty of x_i-EUR
The uncertainty quoted in the following table is 2u_i-EUR, so that it can be given at a resolution consistent with the measured data.

Click on the following links to access EUROMET.AUV.A-K1 data obtained:
- from 63 Hz to 2000 Hz, and
- from 2500 Hz to 8000 Hz.

Results obtained at 10 kHz are not displayed because they cannot be linked to CCAUV.A-K1 results, for which no data were taken at this frequency. They can be found in Table 2 on page 4 of the EUROMET.AUV.A-K1 Final Report.

• Key comparison APMP.AUV.A-K1

x_i-APMP : result of measurements carried out by laboratory i
The quoted pressure sensitivity levels are relative to internal APMP reference values, computed as explained on page 16 of the APMP.AUV.A-K1 Final Report for each frequency, so the nominal value is 0 dB by design.

u_i-APMP : combined standard uncertainty of x_i-APMP
The uncertainty quoted in the following table is 2u_i-APMP, so that it can be given at a resolution consistent with the measured data.

Click on the following links to access APMP.AUV.A-K1 data obtained:
- from 63 Hz to 2000 Hz, and
- from 2500 Hz to 8000 Hz.

• Key comparison SIM.AUV.A-K1

x_i-SIM : result of measurements carried out by laboratory i
The quoted pressure sensitivity levels are relative to internal SIM reference values, obtained as the arithmetic mean of all measurtements available for each microphone, see on page 12 of the SIM.AUV.A-K1 Final Report, so the nominal value is 0 dB by design.

u_i-SIM : combined standard uncertainty of x_i-SIM

The transfer standards were calibrated by the pilot laboratory, NRC, before delivery and after return from a participating laboratory.

Click on the following links to access SIM.AUV.A-K1 data obtained from 125 Hz to 8000 Hz with:
- Microphone serial number 907045 , and
- Microphone serial number 1734004.

• Key comparison APMP.AUV.A-K1.1

x_{KIM-LIPI(APMP-K1.1)}: result of measurements carried out by KIM-LIPI obtained as the difference between KRISS and KIM-LIPI as explained in section 8 of the APMP.AUV.A-K1.1 Final Report.

U_{KIM-LIPI(APMP-K1.1)} : expanded uncertainty of x_{KIM-LIPI(APMP-K1.1)}

From 63 Hz to 8000 Hz, the values of the difference between KRISS and KIM-LIPI and their expanded uncertainties can be found in Table 4 of the APMP.AUV.A-K1.1 Final Report.

• Key comparison COOMET.AUV.A-K1

x_i-COO : result of measurements carried out by laboratory i participant in COOMET.AUV.A-K1
u_i-COO : combined standard uncertainty of x_i-COO

From 63 Hz to 10000 Hz, the values of the pressure sensitivity levels reported by laboratory i for the two microphone 4160.1302519 and 4160.2302521 are given in Table 2 and 3, together with the 2u_i-COO values in Table 4 of COOMET.AUV.A-K1 Final Report.

• Key comparison COOMET.AUV.A-K1.1

x_{i-COO .1}: result of measurements carried out by laboratory i participant in COOMET.AUV.A-K1.1
u_i-COO.1 : combined standard uncertainty of x_i-COO.1

From 63 Hz to 10000 Hz, the values of the pressure sensitivity levels and associated uncertainties reported by laboratory i for microphone 4160.1302520 are given in Table 1 of COOMET.AUV.A-K1.1 Final Report.