GRAS KEMAR 45BB User manual
Instruction Manual
GRAS 45BB KEMAR Head and Torso
GRAS 45BC KEMAR Head and Torso with Mouth Simulator
Revision History
Revision Date Description
First edition
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Virtual KEMAR)
www.grasacoustics.com
Trademarks
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Instruction Manual
Contents
Introduction ...................................................................................................................................................
General Description......................................................................................................................................
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Instruction Manual
Test Setups..................................................................................................................................................
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Instruction Manual
Introduction
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Standards
• Specification for a Manikin for Simulated in situ Airborne Acoustic
Measurements
• American National Standard for an Occluded Ear Simulator
• Head and Torso Simulator for the Measurement of Hearing Aids
• Ear SimulatorOccluded-ear simulator for the measurement of earphones
coupled to the ear by means of ear inserts
• Artificial Ears
and based on
• Head and Torso Simulator for Telemetry
*See also the KEMAR Book (KB0000). Can also be downloaded from www.gras.dk.
Instruction Manual
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1
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0+10
-10 55
A
B-1
0+10
-10
0 10 20
J
G.R.A.S.
Handset Positioner
for KEMAR
Type 45E A
Serial No. 123456
02010
0
30 30
G
-+
F
+20 -20
0
3
2
1
K
Fig. 1. 45BB KEMAR shown with one neck ring.
Fig. 2. The 45BC KEMAR with Mouth Simulator –
here shown with 45EA Handset Position-
ing System
General Description
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Instruction Manual
CCP 200VAux200V CCP
Power
Supply
SerialNo. XXXXXX
LeftEar
G.R.A.S.
Headand Torso Type 45BB
RightEar
4
5
3
0
1
5
1
5
3
0
4
5
00
15
3045
CCP 200VAux200V CCP
Power
Supply
SerialNo. XXXXXX
LeftEar
G.R.A.S.
Headand Torso Type 45BB
RightEar
4
5
3
0
1
5
1
5
3
0
4
5
00
15
3045
Fig. 3. Side view of KEMAR shown with pinnae.
Fig. 4. KEMAR provides full instrumentation
connectivity at the bottom of the back.
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Instruction Manual
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Note
KB0060 KB0061
KB0065 KB0066
Fig. 5. Large pinnae. The anthropometric
pinnae have the same outer shape.
Fig. 6. Small pinnae.
Instruction Manual
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Fig. 7. KEMAR tted with an ear canal extension.
It is push-mounted from the inside.
Instruction Manual
RA0249
RA0250
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Or
Fig. 8. The ear canal extension/ear simulator holder is screwed onto the ear simulator.
Instruction Manual
-10
0
100 10000
100000
1000
Freq [Hz]
Magnitude [dB]
10
20
30
40
Typical Frequency Response
Fig. 9. Typical coupler frequency response re. 500 Hz.
Note:
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Instruction Manual
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-20
-10
0
10
20
30
40
50
60
70
80
90
10 100 1000 10000
dB SPL re 20 μPa
Frequency [Hz]
Linear
Hearing Threshold
SPL [dB re 20 µPa]
9
Frequency [Hz]
Fig. 10. The noise oor (solid curve) is typically below the threshold of human hearing (dashed curve)
Frequency [Hz]
dB re 500 Hz
Fig. 11. Typical frequency response (solid blue) versus the IEC tolerances (dashed black) and the ideal
IEC 60318-4 frequency response (red curve)
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Instruction Manual
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0
5
10
15
20
25
30
35
40
100 1000 10000
Transfer impedance [dB re 500 Hz]
Frequency [Hz]
Typical response
Upper tolerance
Lower tolerance
Fig. 12. Typical coupler frequency response re. 500 Hz.
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0
5
10
15
20
25
30
35
40
45
50
55
100 1000 10000 100000
Transfer impedance [dB re 500 Hz]
Frequency [Hz]
Typical response RA0403 IEC Tolerance GRAS RA0403 Tolerance
Fig. 13. Typical coupler frequency response re. 500 Hz.
Instruction Manual
Instruction Manual
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1
5
4
5
4
5
3
0
1
5
0
0
3
0
0+10
-10 55
A
B-1
0+10
-10
0 10 20
J
G.R.A.S.
Handset Positioner
for KEMAR
Type 45EA
Serial No. 123456
02010
0
30 30
G
-+
F
+20 -20
0
3
2
1
K
Fig. 14. 45BC KEMAR with Mouth Simulator and Ear simulator and with 45EA Handset Positioning System.
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Instruction Manual
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0,0
10,0
20,0
30,0
40,0
50,0
60,0
70,0
80,0
90,0
100,0
110,0
120,0
100,0 1000,0 10000,0
SPL [dB re 20uPa]
Frequency [Hz]
Typical Mouth Response Typical Equalized Mouth Response
Fig. 15. Typical frequency response measurements using the ITU-T Rec. P.58 setup shown in Fig. 52 on
page 65. The upper curve is the frequency response for an input signal of 1 V RMS with the internal ampli-
er switched on. The lower curve shows the same response equalized at 90 dB.
Instruction Manual
Instruction Manual
4
5
3
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1
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1
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3
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4
5
00
4
5
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1
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1
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3
0
4
5
00
12mm
Back
Front
Guide
pin
0+10
-10 5 5
A
0+15
-15
0+15
-15
Fig. 16. 45BB KEMAR Head & Torso, non-congured. Pinnae are not included.
Instruction Manual
Order number
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Instruction Manual
Common Accessories
GS0158
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
KB0065 KB0066
KB0065 KB0066
45BB-1 LEMO 45BB-2 CCP
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
GR0917
GR0924
GR1440B
RA0045
26AS
45EA
46BP
RA0241
40AG
GS0158
GR0010
46BD 1
2
43
5
L
B-2 B-1
02010
01020
J
GR1153
46BP-1
40AD
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
Instruction Manual
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