The GRAS 43AC-S7 Ear Simulator Kit with TEDS is a complete test-jig for hi-res measurements up to 50 kHz on earphones coupled to the ear by inserts such as tubes and earmolds.
Technology
The GRAS 43AC-S7 Ear Simulator Kit is a complete test jig for acoustically testing earphones coupled to the ear via inserts such as tubes and ear molds and is compatible with the following international requirements:
43AC-S7 uses the RA0404 Hi-Res Ear Simulator which extends the useful frequency range to 50 kHz. Read more abot the RA0404 here.
The 43AC-S7 comprises:
-
GRAS RA0404 Prepolarized Hi-Res Ear Simulator
-
GRAS 40BD 1/2" Pressure Microphone (included in RA0404)
-
GRAS 26CB 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.
An externally polarized version is available, GRAS 43AC-S6.
TEDS Compatibility
43AC.-S7 is IEEE 1451.4 TEDS v. 1.0 compliant. If your measurement platform supports Transducer Electronic Data Sheets (TEDS), you will be able to read and write data like properties and calibration data.
Specifications
| Parameter |
Unit |
Value |
| Theoretical lower dynamic range |
dB(A) |
44 |
| Theoretical upper dynamic range at +28 V / ±14 V |
dB |
166 |
| Sensitivity @ 250 Hz (±3 dB) |
mV/Pa |
1.6 |
| Coupler volume |
mm³ |
1260 @ 500 Hz |
| Resonance frequency |
kHz |
13.5 |
| Operating temperature range |
°C / °F |
-30 – 60 / -22 – 140 |
| Temperature coefficient @250 Hz |
dB/°C / dB/°F |
-0.01 / -0.006 |
| Non-condensing humidity range |
% RH |
0 – 75 |
| ANSI standard |
|
S3.7 |
| IEC standard |
|
60318-4 (formerly 60711) |
| CE / RoHS / WEEE compliance |
|
Yes / Yes / Yes |
| Connector type |
|
Microdot 10/32 |
| Weight |
g / oz |
1550 / 54.675 |
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Fig 1. The transfer impedance of a typical RA0404 Hi-Res Ear Simulator with tolerances. Up to 10 kHz, the response is within the limits defined by IEC 60318-4. Above 10 kHz, the response is within a fairly tight tolerance band up to 50 kHz
