RST1000 is a 1/4 "capacitive high precision free field microphone especially for audio test. Because the microphone diaphragm diameter is small, the reflection and diffraction to the sound field is weak, it can get very good broadband response, especially the high frequency response is smooth.

          RST1000 microphone adopts special composite metal vibrating film and special material back plate. It can ensure the accuracy and stability of microphone and can adapt to a variety of complex and harsh environment.

           RST1000 free field microphone includes a 1/4 inch constant current preamplifier (can be changed into a 1/2 inch preamplifier with a special converter) and a SMB-BNC connector line. In the using process, a stable power supply providing constant voltage and constant current is needed.

Technical parameter

    ◆   Cartridge Type：                   Prepolarized condenser element and metal diaphragm 
    ◆   Directional characteristic：       Omni-directional
    ◆   Frequency Response:
                                                                20Hz-40kHz±1dB
                                                                10Hz-60kHz±2dB
    ◆   Nominal Sensitivity：                    4mv/Pa, -48dB±3dB re 1V/Pa
    ◆   Polarization Voltage：                   0V
    ◆   Dynamic Range：                          40-156dB
    ◆   Outside Diameter：                       6.9mm with protection grid
    ◆   Length：                            65mm with preamplifier but without cable connector
    ◆   Accessories：                                  SMB-BNC extension cable
    ◆   Relative Humidity：                       0 to 90%
    ◆   Temperature：                               -20℃ to +100℃

 Fig.1 Typical frequency response of RST1000