GRAS 43AD Ear Simulator Kit According to ITU-T Rec. P57 Type 1
Connection: 200 V/LEMO
Volume: Complex
Dyn range: 25 dB(A) to 164 dB
ANSI S3.7
IEC: 60318-1
Technology
The GRAS 43AD is a complete assembly for acoustical measurements on acoustical transmitters and loudspeakers in accordance with:
- IEC 60318-1 & -2 Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator for the calibration of supra-aural earphones, 1998-07
- ITU-T Recommendation P.57 (08/96) Series P: Telephone transmission quality, Objective measuring apparatus: Artificial ears.
It can be integrated with a telephone test head or permanently installed on a production test line.
The 43AD comprises:
- IEC 318 GRAS RA0039 Ear Simulator
- GRAS 40AG ½" Pressure Microphone
- GRAS 26AK ¼" Preamplifier
- Snap coupling GR0332 and RA0523
- Mounting plates for circum-aural and supra-aural headphones
A prepolarized version is available, GRAS 43AD-S1.
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
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
IEC standard
60318-1 (former 60318)
ITU-T recommondations
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
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Ordering info
Included
| GRAS RA0039 | IEC 318 Ear Simulator |
| GRAS 40AG | ½" Pressure Microphone, Wide Frequency |
| GRAS 26AK | ½" Preamplifier |
| GRAS AA0008 | 3 m Extension Cable |
| GR0332 | Snap Coupling (female) |
| GR0336 | Snap Coupling (male) |
| GR0339 | for testing earphones fitted with fluid cushions |
Optional
| GRAS 12AK | Power Module |
| GRAS 42AA | Pistonphone |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
