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Miniature Cardioid Condenser Microphone

AT831b
  • Clip-on lavalier mic provides crisp, full-sounding voice pickup
  • Also excels as an instrument mic, especially for pickup of acousticguitar with included AT8444 instrument adapter
  • Excellent gain before feedback and suppression of background noise
  • Switchable low-frequency roll-off
  • Operates on battery or phantom power

    For use as a lavalier, attach AT831b microphone about 150mm below the chin. Anticipate movements that may cause the microphone to rub against or be covered by clothing, and position the microphone to avoid it.

    • audio technica AT831b
  • AT831b Specifications

    Element

    Fixed-charge back plate, permanently polarized condenser

    Polar Pattern

    Cardioid

    Frequency Response

    40 ~ 16,000 Hz

    Open Circuit Sensitivity

    Phantom: -44 dB (6.3 mV) re 1V at 1 Pa;
    Battery: -45 dB (5.6 mV) re 1V at 1 Pa

    Impedance

    Phantom: 200 Ω;
    Battery: 270 Ω

    Maximum Input Sound Level

    Phantom: 135 dB SPL, 1 kHz at 1% T.H.D.;
    Battery: 121 dB SPL, 1 kHz at 1% T.H.D.

    Low Frequency Roll-Off

    80 Hz, 18 dB/octave

    Dynamic Range (Typical)

    Phantom: 106 dB 1 kHz at Max SPL;
    Battery: 92 dB 1 kHz at Max SPL

    Signal-To-Noise Ratio

    66 dB, 1 kHz at 1 Pa

    Phantom Power

    11~52V DC, 2 mA typical

    Battery Type

    1.5V AA/UM3

    Battery Current / Life

    0.4 mA / 1200 hrs typical (alkaline)

    Switch

    Off, on-flat, roll-off

    Weight

    Microphone: 2.8 g;
    Power Module: 139 g

    Dimensions

    Microphone: 25.0mm long x 10.2mm diameter;
    Power Module: 84.0mm x 63.0mm x 22.0mm (High x Wide x Thick)

    Output Connector

    Integral 3-pin XLRM-type

    Cable

    1.8 m long (permanently attached to microphone), 2.6 mm diameter

    Accessories Furnished

    AT8531 power module;
    AT8417 clothing clip;
    AT8444 instrument adapter;
    AT8116 windscreens;
    protective carrying case

    Download

    audio technica support AT831b.pdf - Operation Manual