1. Introduction

           AE2000 Artificial Ear is a complete test simulator for acoustical measurement on earphones coupled to the ear by inserts such as tubes and ear moulds, including audiphones measuring. AE2000 consists of an acoustic coupler, RST pressure field microphone and preamplifier and a base plate, whose all parts are made of stainless steel without magnetic material.

            Artificial Ear Type AE2000 fulfills the requirements of IEC 60711. The acoustic impedance of the acoustic coupler simulates the acoustic impedance of the human ear under no leakage conditions. The coupler fits 1/2 inch microphone and 1/2 inch microphone preamplifier mounted in the base. The coupler is also mounted directly on the preamplifiers by the adaptor ring supplied.

2. Characteristics

    ◆   Conformed to IEC 60711 and ANSI S3.25standards

    ◆   Complete reproducibility and steady results

    ◆   Well-defined measuring conditions

    ◆   Frequency response, THD and sensitivity for headset and audiphone

3. Components

    The AE2000 comprises the following main components:

    ◆   SC0002                IEC 60711 Ear Simulator

    ◆   RST 4000-S            1/2 inch Pressure Microphone Preamplifier, Wide Frequency

    ◆   Type SC0006           Base Plate

Fig.1 AE2000 Artifical Ear

4. AE2000 Artifical Ear

      Artificial Ear Type AE2000 fulfils the requirements of IEC 60711 and is defined for simulating the acoustical load of the human ear under no leakage conditions. The coupler fits 1/2 inch Microphone and 1/2 inch Microphone Preamplifier mounted in the hous¬ing. The coupler also mounts directly on the preamplifiers by the adaptor ring supplied.

Fig.2 Block diagram for telephone audio test

5. Remarks

    The following additional equipment is required for making the necessary measurements:

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

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

    ◆   Audio analysis system, which can generate testing signal and analyze the recording signal from the DUT (e.g. RSTech TrustSystem)

6. Technical Parameters

    ◆   General acoustic parameters:

          Frequency range:        100Hz-4 kHz

          Standards:              According to ITU-T P.57 Type 1 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:     97mm×100mm×1.5Kg

  7. Uses

            AE2000 can be widely used in the tests on headphones, telephones and telephone receivers. In the actual working process, AE2000 can also constitute HD300 headphone test jig with AM3000 artificial mouth, soft pinna and corresponding jig, which can meet the need of the standardized headsets tests.