No description

Mono Boundary Microphone


  • High quality small mono microphone for digital recorder
  • Plug-in power*1 method or operation of LR44 battery with power module
  • It is possible to use for the personal computer by three pole plug adoption*2
  • Newly developed pivot floating structure to decrease external vibration noise of equipment
  • Switchable polar patterns: omni / cardio
  • It excels in the acoustical property, and the metal mesh that decreases the extrinsic noise is used for all aspects
    *1The plug-in power method is supplied the power supply from the microphone input of the connected equipment to the microphone and operates
    *2It is not possible to use it for a part of personal computer such as Mac

    • audio technica AT9921
  • AT9921 Specifications

    Mono Electret Condenser
    Polar Pattern
    Omnidirectional / Unidirectional switchable
    Frequency Response
    100 ~ 15,000 Hz
    -38 dB (12.6 mV) re 1V at 1 Pa
    2,000 Ω
    Power Supply
    Battery / Plug in Power
    Battery Current / Life
    About 300 hrs.
    Mic.: 24.5mm(H) x 55mm(W) x 61mm(D)
    Power module: 13.6mm(H) x 22.4mm(W) x 44.8mm(D)
    Microphone: 46 g;
    Power module: 15 g
    Mic.: 1.6 m
    Power module: 0.2 m
    Accessories Furnished
    Power module, LR44 battery


    audio technica support AT99s.pdf - AT99 Series Brochure (Chinese)