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:

 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
Coupler volume
mm³
0.4 ccm
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.

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