符合 IEC 60318-1 和 -2 标准的 GRAS 43AA 耳模拟器套件

Connection: 200 V/LEMO
Volume: Complex
Dyn range: 25 dB(A) to 164 dB
ANSI: S3.7
IEC: 60318-1 & -2

GRAS 43AA 耳模拟器套件是用于电话听筒和耳机声学测量的全套测试夹具。它包括一个 IEC 60318 耳模拟器 RA0039，该模拟器根据 ITU-T 建议 P.57 (08/96) “P 系列：电话传输质量，客观测量仪器：人工耳 ”进行了单独校准。

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:

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

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 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 26AC ¼" Preamplifier
GRAS RA0052 Test Jig

GRAS GR0339

 Circum-aural plate

Optional

GRAS 12AK Power Module
GRAS 42AA Pistonphone - calibration source

Miscellaneous

GRAS RA0196 High-tension springs (set of two)

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.