GRAS 43AG Series User manual

LI0189 – 23 Augu8st 2019
Instruction Manual
GRAS 43AG Ear and Cheek Simulator

Instruction Manual 2 | GRAS 43AG Ear and Cheek Simulator
Revision History
Any feedback or questions about this document are welcome at [email protected].
Revision Date Description
14 April 2016 
2 20 July 2016 
  Additions to section about Assembly
4 9 September 2016 
16 November 2016 
6 14 March 2017 
7 19 December 2017 
8 









not liable or responsible for any errors or inaccuracies that may appear in this document.
Trademarks



Instruction Manual 43AG Ear and Cheek Simulator | 3
Contents
Introduction ...................................................................................................................................................4
The Scope of this Manual..................................................................................................................................... 
Delivered Items..............................................................................................................................................5
 .......................................................................................................... 
...................................................................................................................................... 
........................................................... 
 ............................................................. 
 ................................................................................................ 
..........................................
 ............................................
 ...........................................................
..............................................................
Assembly...................................................................................................................................................... 14
 ........................................................................................................................
.................................................................................................
...................................................................................................................................................................
Adjusting Clamp Height and Force......................................................................................................... 17
..............................................................................................................................
..............................................................................
Mounting the KEMAR Pinnae ................................................................................................................... 19
Test Setups.................................................................................................................................................. 20
Calibration ................................................................................................................................................... 21
...........................................................................................................................................
..............................................................................................................................................
..............................................................................................................................................
Correction Factors ..............................................................................................................................................
Technical Specifi cations........................................................................................................................... 25
 ........................................................................................................................
 ..............................................................................................
 ....................................................................................
 ...............................................
 .................................................................
Accessories ................................................................................................................................................. 30
Warranty, Service and Repair................................................................................................................... 32
Calibration .............................................................................................................................................................
Warranty.................................................................................................................................................................
Service and Repairs ............................................................................................................................................

Instruction Manual 4 | GRAS 43AG Ear and Cheek Simulator
Introduction










• 
• 
• 
• 
• 
• 
• 
• 
• 

• 
• 
• 
The Scope of this Manual




Instruction Manual 43AG Ear and Cheek Simulator | 5
Delivered Items
43AG-1 Ear and Cheek Simulator LEMO
43AG-1

force clamp

Cheek Plate 
KB0065 KB0066
 
 
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



Angled 1/2” to 1/4” Adapter 
 
 
 
Union Nut 

Instruction Manual 6 | GRAS 43AG Ear and Cheek Simulator
43AG-2 Ear and Cheek Simulator CCP
43AG-2

force clamp

Cheek Plate 
KB0065 KB0066
 
 
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



Angled 1/2” to 1/4” Adapter 
 
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
 
 
 
Union Nut 

Instruction Manual 43AG Ear and Cheek Simulator | 7
43AG-3 Ear and Cheek Simulator w. Anthropometric Pinna LEMO
43AG-3

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
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



Angled 1/2” to 1/4” Adapter 
 
 
 
Union Nut 

Instruction Manual 8 | GRAS 43AG Ear and Cheek Simulator
43AG-4 Ear and Cheek Simulator w. Anthropometric Pinna CCP
43AG-4

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
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



Angled 1/2” to 1/4” Adapter 
 
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
 
 
 
Union Nut 

Instruction Manual 43AG Ear and Cheek Simulator | 9
43AG-5 Ear and Cheek Simulator, Low-noise
43AG-5

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
 
 
Union Nut 
 
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

Angled 1/2” to 1/4” Adapter 


MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
 
 

Instruction Manual 1 0 | GRAS 43AG Ear and Cheek Simulator
43AG-6 Ear and Cheek Simulator w. High-Frequency Ear Simulator LEMO
43AG-6

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
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

lator

Angled 1/2” to 1/4” Adapter 
 
 
 
Union Nut 

Instruction Manual 43AG Ear and Cheek Simulator | 1 1
43AG-7 Ear and Cheek Simulator w. High-Frequency Ear Simulator CCP
43AG-7

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
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
 
Angled 1/2” to 1/4” Adapter 
 
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
 
 
 
Union Nut 

Instruction Manual 1 2 | GRAS 43AG Ear and Cheek Simulator
43AG-8 Ear and Cheek Simulator w. Hi-Res Ear Simulator LEMO
43AG-8

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
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
 
Angled 1/2” to 1/4” Adapter 
 
 
 
Union Nut 

Instruction Manual 43AG Ear and Cheek Simulator | 1 3
43AG-9 Ear and Cheek Simulator w. Hi-Res Ear Simulator CCP
43AG-9

force clamp

Cheek Plate 
KB5000 KB5001
G.R.A.S.
Do not pull
Do not pull
G.R.A.S.



Ear Simulator Holder 
  
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
 
Angled 1/2” to 1/4” Adapter 
 
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
MicroDot Stik
LEMO to LEMO BNC to BNC Power Supply
 
 
 
Union Nut 

Instruction Manual 1 4 | GRAS 43AG Ear and Cheek Simulator
Assembly
Before Assembly – All Versions





Cheek plate

plate is held in place by the


Fig. 1. The snap fi t mechanism explained. Here shown with the GR1874 Ear Simulator Holder.






Canal
Unscrew the

Nut to remove the

Fig. 2. The GR0408 External Ear Canal must be removed from the ear simulator prior to mounting.
43AG-1 to 43AG-4 and 43AG-6 to 43AG-9

proceed as follows:
 

 



Instruction Manual 43AG Ear and Cheek Simulator | 1 5
1 2
 



Simulator Holder

(with holder
or ear canal

Fig. 3. Mounting the ear simulator in the test jig.
 


 


4

Cheek plate
Flat arm

mechanism
Clamp

screw
Pin*
Screw

Fig. 4. Mounting the cheek plate and the spring-loaded clamp.

43AG-5


Important. 
noise performance.






Instruction Manual 1 6 | GRAS 43AG Ear and Cheek Simulator
Reassembling the Ear Simulator and Preamplifi er


Caution! 



Ear Simulator with Angled Adapter CAUTION
Fig. 5. Mounting the angled adapter – use only gentle fi nger force.

Instruction Manual 43AG Ear and Cheek Simulator | 1 7
Adjusting Clamp Height and Force
Adjusting the Clamp Height








90°
90°

90 mm
90°
AC
Fig. 6. Adjusting the spring-loaded clamp’s distance to the cheek plate.

attached to the cheek plate.



Instruction Manual 1 8 | GRAS 43AG Ear and Cheek Simulator
Adjusting the Spring Tension and Measuring its Force




the knurled knob clockwise will allow the holder to move upwards and decrease the tension.

2 mm apart

knob

holder
Fig. 7. Adjusting the preload of the springs.







Philips screw
90°
Fig. 8. Measuring the force applied to the DUT. Fig. 9. Mounting the RA0199 Finger Simulator.

Instruction Manual 43AG Ear and Cheek Simulator | 1 9
Mounting the KEMAR Pinnae







Important. 

with the cheek plate.
Do not pull
.A.S.
Fig. 10. Securing an anthropometric pinna with two fi nger screws.
 

 Push the ear down over the studs.
 
 


Instruction Manual 2 0 | GRAS 43AG Ear and Cheek Simulator
Test Setups



G.R.A.S.
Power Module
Type 12AK
Gain
+20
+10 +30 +40
+50
0
HP Dir
Lin AW
Filter
Overload
Inst.Latch
SysCh.
Adjust
Power
On
Ovl.
Reset
Low
Batt.
Signature Series
Output
Input
12AK Power Module
From Preamplifier
Power Amplifier
Out
In
43AG Ear and Cheek Simulator Electroacoustic Analyzer
To DUT
Fig. 11. Typical test setup for 43AG, here for the externally polarized 43AG-1, 43AG-3 and 43AG-6.




are part of the delivery and cannot be replaced by other equipment.
12HF Power Module
From 26AC Preamplifier
Power Amplifier
Out
In
43AG-5
Ear and Cheek Simulator
Electroacoustic Analyzer
G.R.A.S.
PowerModule
Type 12HF
On
Pressure
Overload
Output
Input
Free Field
Power
Low
Batt.
SignatureSeries
From low-noise
Ear Simulators
26HT Gain and
Filter Unit
To DUT
Fig. 12. Test setup for 43AG-5 with 26HT Gain Unit and the 12HF Power Module.