1. Introductions

          AE4000 consists of an acoustic coupler, RST condenser pressure field microphone and preamplifier and a base plate, of which all parts are made of stainless steel without magnetic material.

          AE4000 is a type of Artificial Ear that fulfills the requirements of IEC71. It is used for measurements on the ear cover type headphones and telephone sets, both sealed and unsealed, intended for wideband telephony application (100Hz to 8kHz).

          A well-defined leak from the cavity to exterior simulates the average real ear loss telephone handsets which are held either firmly (low leak grade) or loosely (high leak grade) against the human ear.

          This design complies with the following ITU-T Rec.P.57, Type 3.2 low-leak and high-leak simplified pinna simulators.

2. Characteristics

    ◆   Conformed to IEC60318 and ANSI standards

    ◆   Complete reproducibility and steady results

    ◆   Well-defined measuring conditions

3. Components

   Artificial Ear Type AE4000 comprises the following main components:

    ◆   SC0002               IEC 60711 simulator with microphone included

    ◆   RST4000-S         1/2 inch Wide Frequency Pressure Field Microphone and Preamplifier

    ◆   SC0005                High-leak Pinna Simulator

    ◆   SC0004                Low-leak Pinna Simulator

4. Remarks

    The following additional equipment is required for necessary measurements

    ◆   Power supply for the 1/2 inch Preamplifier.(e.g. RStech power supply module PM2000-S)

    ◆   Calibration source for microphone (e.g. B&K 4231)

    ◆   Audio analysis system, which can generate test signal and analysis the recording signal from the DUT.(e.g. RStech TrustSystem acoustic analysis system)

              Pic. 3  PM2000-S power module     

5. Technical parameter

    ◆   General acoustic parameters:

         Frequency range:     100Hz-84 kHz

         Standards:     According to ITU-T P.57 Type 3.2 artificial ear

          Typical Sensitivity:     -40dB re 1V/Pa at 1000Hz

    ◆   Atmospheric reference conditions

         Static pressure:    101.3±3Pa

         Temperature:    23±3℃

         Humidity:    60±20%

    ◆   Dimensions

         Height×Diameter×Weight:    115mm×60mm×1.6Kg

6.Applications

           AE4000 can be widely used in the tests on headphones, telephones and telephone receivers. In the actual working process, AE4000 can also constitute HD300 headphone test support with AM3000 artificial mouth, soft pinna and corresponding jig, which can meet the need of the standardized headsets tests.