The GRAS 43AC Ear Simulator Kit is a complete test-jig for acoustical measurements on earphones coupled to the ear by inserts such as tubes and ear moulds.
Technology
The GRAS 43AC 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.
The 43AC comprises:
- GRAS RA0045 Ear Simulator
- GRAS 40AG 1/2" Pressure Microphone
- GRAS 26AC 1/4" Preamplifier
- GRAS RA0001 Right-angled Adapter
- GRAS RA0052 Test Jig
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-S1.
Specifications
| Parameter |
Unit |
Value |
| 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 90 |
| 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 |
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Typical frequency response for RA0045
