GRAS 43AC-S1 CCP Ear Simulator Kit According to IEC 60318-4

Connection: 0 V/CCP
Volume: 1260 @ 500 Hz
Dyn range: 25 dB(A)to 150 dB
ANSI: S3.7
IEC: 60318-4


 The GRAS 43AC-S1 is a complete test jig for acoustically testing earphones coupled to the ear via inserts such as tubes and ear moulds and complies with the following international requirements:

  • IEC 60318-4: Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts.
  • ITU-T Recommendations P.57 (08/96) Series P: Telephone transmission quality, Objective measuringapparatus: Artificial ears.

The 43AC-S1 comprises:

The Test Jig has an adjustable spring-loaded arm to exert a variable force on the test object.
Click GRAS RA0045-S1 for more information about the RA0045-S1 Ear Simulator.

An externally polarized version is available, GRAS 43AC.


Theoretical dynamic range lower limit with GRAS preamplifier
Theoretical dynamic range upper limit with GRAS CCP preamplifier
Set sensitivity @ 250 Hz (±2 dB)
Set sensitivity @ 250 Hz (±2 dB)
dB re 1V/Pa
Coupler volume
1260 @ 500 Hz
Resonance frequency
Temperature range, operation
°C / °F
- 30 to 60 / -22 to 140
Temperature coefficient @250 Hz
dB/°C / dB/°F
- 0.01 / -0.006
Humidity range non condensing
% RH
0 to 75
ANSI standard
IEC standard
60318-4 (former 60711)
ITU-T recommondations
P.57 Type 2
CE/RoHS compliant/WEEE registered
Connector type
Microdot 10/32
g / oz
1.55 / 54.675

Ordering info

Optional Items

GRAS RA0196 High-tension springs (set of two)

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

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