GRAS 43AE 耳模拟器套件符合 ITU-T Rec. P57 类型 3.2
GRAS 43AE 耳模拟器套件符合 ITU-T Rec. P57 类型 3.2
Connection: 200 V/LEMO
Volume: Complex
Dyn range: 26 dB(A) to 164 dB
ANSI: S3.7
GRAS 43AE 耳模拟器套件符合 ITU-T Rec. P57 类型 3.2 是用于测试超耳耳机、电话听筒和扬声器的声学设备，符合国际要求：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"。
Technology
The 43AE is an IEC 60318-4 (60711) Ear Simulator for acoustical testing of supra-aural earphones, telephone handsets and loudspeakers in accordance with
- IEC60318-4 Occluded-ear simulator for the mesurem,ent of earphones coupled to the ear by ear inserts
- ITU-T Recommendations P57 (08/96) Series P: Telephone transmission quality, Objective measuring apparatus: Artificial ears
The 43AE comprises:
- IEC 60318-4 GRAS RA0045 Ear Simulator
- GRAS 26AC-1 ¼" Preamplifier
- GRAS GR0010 ¼" - ½" Adapter
- GRAS RA0056 Low-leak Pinna Simulator
- GRAS RA0057 High-leak Pinna Simulator
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
1260 @ 500 Hz
Resonance frequency
kHz
Low 713.8, High 1570
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 75
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
1.05 / 37.038
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Ordering info
Included
| GRAS RA0045 | IEC 60711 coupler with microphone included |
| GRAS 26AC-1 | ¼" Preamplifier |
¼" - ½" Adapter | |
| GRAS RA0056 | Low-leak Pinna Simulator |
High-leak Pinna Simulator |
Optional
Power Module | |
| GRAS 42AA | Pistonphone |
Miscellaneous
| GRAS RA0119 | Pistonphone adapter |
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
