The GRAS 43AA Ear Simulator Kit is a complete test jig for acoustical measurements on telephone handsets and earphones. It includes an IEC 60318 Ear Simulator RA0039 which is individually calibrated according to the ITU-T Recommendation P.57 (08/96) ”Series P: Telephone transmission quality, objective measuring apparatus: artificial ears.
Technology
The GRAS 43AA is a complete test jig for acoustical measurements on telephone handsets and earphones in accordance with:
- IEC60318-1 & -2 Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator for the calibration of supraaural earphones, 1998-07
- ITU-T Recommendation P.57 (08/96) Series P: Telephone transmission Quality, Objective measuring apparatus: Artificial Ears
It consists of the following components:
- IEC 60318-1 & -2 GRAS RA0039 Ear Simulator
- GRAS 40AG ½" Pressure Microphone
- GRAS 26AC ¼" Preamplifier
- GRAS RA0052 Test Jig
- Mounting plates for circum-aural and supra-aural headphones
The Test Jig has an adjustable spring-loaded arm to exert a variable force on the test object.
A prepolarized version is available, GRAS 43AA-S2.
A version with a GRAS 26AB. Preamplifier is available, GRAS 43AA-S3.
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 |
| 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 80 |
| ANSI standard |
– |
S3.7 |
| ITU-T recommendations |
– |
P.57 Type 1 |
| CE/RoHS compliant / WEEE registered |
– |
Yes / Yes, Yes |
| Connector type |
– |
3 m 7-pin LEMO |
| Weight |
g / oz |
1.65 / 58.202 |
