GRAS 43AC-S4 High-Frequency Ear Simulator Kit LEMO

Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
Use: For general acoustic diagnostics

The GRAS 43AC-S4 Ear Simulator Kit is a complete test-jig for high-frequency acoustical measurements up to 20 kHz on earphones coupled to the ear by inserts such as tubes and ear moulds.

Technology

The GRAS 43AC-S4 Ear Simulator Kit 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.

43AC-S4 uses the RA0401 High-Frequency Ear Simulator which extends the useful frequency range to 20 kHz. Read more abot the RA0401 here.

The 43AC comprises:

The Test Jig has an adjustable spring-loaded arm to exert a variable force on the test object.

A prepolarized version is available, GRAS 43AC-S5.

Specifications

Theoretical dynamic range lower limit with GRAS preamplifier
dB(A)
25
Theoretical dynamic range upper limit with GRAS preamplifier @ +28 V / ±14 V power supply
dB
153
Theoretical dynamic range upper limit with GRAS preamplifier @ +120 V / ±60 V power supply
dB
164
Set sensitivity @ 250 Hz (±2 dB)
mV/Pa
12
Set sensitivity @ 250 Hz (±2 dB)
dB re 1V/Pa
-38.5
Coupler volume
mm³
1260 @ 500 Hz
Resonance frequency
kHz
13.5
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
S3.7
IEC standard
60318-4 (former 60711)
CE/RoHS compliant/WEEE registered
Yes/Yes/Yes
Connector type
3 m 7-pin LEMO
Weight
g / oz
1550 / 54.675

Typical frequency response for RA0401

Ordering info

Included

GRAS RA0401 High-Frequency Ear Simulator, including 40AG microphone (ext. polarized)

GRAS 26AC

 ¼" Preamplifier
GRAS RA0001 Right Angled Adapter
GRAS RA0052 Test Jig
GRAS GR0435 In-ear Adapter
GRAS GR0436 Tube stud
GRAS GR0437 Ear-mould Simulator
GRAS GR0438 Union nut
GRAS GR0440 Tube stud
GRAS GR0433 Calibration Adapter
GRAS GR0434 Stop Washer
GRAS MI0070 Cord 0.2 m

Optional

GRAS 12AK Power Module
GRAS 42AA Pistonphone

Miscellaneous

GRAS RA0196 High-tension springs (set of two)

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