Audio-Technica AT831b Cardioid Condenser Lavalier Microphone

Audio-Technica AT831b Cardioid Condenser Lavalier Microphone

Audio-Technica AT831b Cardioid Condenser Lavalier Microphone

B&H # AUAT831B MFR # AT831B
Audio-Technica AT831b Cardioid Condenser Lavalier Microphone

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Product Highlights

  • Clip-On Lavalier Microphone
  • Great on Guitars
  • Full Rich Sound for Vocals & Instruments
  • Frequency Response: 40 Hz to 16 kHz
  • Switchable Low-Frequency Roll-Off
  • Maximum SPL: 135 dB
  • Operates on Battery or Phantom Power
  • Attached Cable: 6'
  • TA3F Connector at Power Module
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Audio-Technica AT831B Overview

  • 1Description

The Audio-Technica AT831b is a miniature cardioid lavalier microphone with a sensitivity and frequency response suitable for professional video, broadcast and sound reinforcement applications. The cardioid polar pattern is effective minimizing off-axis signal, providing high gain-before-feedback while using nearby monitors and speakers.

The wide frequency response of 40 Hz to 16 kHz enables audio signal to be reproduced with accurate detail and minimal noise at low frequencies. The miniature capsule enables the microphone to be hidden underneath clothing, and the included windscreen protects against noise caused by plosive signals and wind.

Miniature Capsule
The miniature, unobtrusive capsule allows for easy concealment underneath clothing.
Cardioid Polar Pattern
The cardioid polar pattern is effective in minimizing audio signal at the off-axis sections of the capsule. This provides high gain-before-feedback response while using nearby monitors and speakers.
High Sensitivity
The frequency and sensitivity response of the AT831 result in transparent, pristine audio signal reproduction with low noise floor.
UPC: 042005309078
In the Box
Audio-Technica AT831b Cardioid Lavalier Condenser Microphone
  • AT8417 - Lavalier Tie / Clothing Clip
  • Acoustic Guitar Microphone Mount
  • AT8531 In-Line Powering Module
  • AT8116 Mini Lavalier Windscreen
  • (AA) Battery
  • Protective Carrying Case
  • Limited 5-Year Warranty
  • Table of Contents
    • 1Description

    Audio-Technica AT831B Specs

    Transducer Permanently Polarized Condenser
    Polar Pattern Cardioid
    Frequency Response 40 Hz to 16 kHz
    Low Frequency Roll-Off 80 Hz, 18 dB/Octave
    Sensitivity Phantom: -44 dB (6.3 mV) re 1 V at 1 Pa
    Battery: -46 dB (5.0 mV) re 1 V at 1 Pa
    Impedance Phantom: 200 Ohms
    Battery: 270 Ohms
    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.
    Dynamic Range (Typical) Phantom: 106 dB, 1 kHz at Max SPL
    Battery: 92 dB, 1 kHz at Max SPL
    Signal-to-Noise Ratio 65 dB, 1 kHz at 1 Pa
    Power Requirements Phantom Power Requirements: 11 to 52 VDC, 2 mA Typical
    Battery Battery Type: 1.5 V AA/UM3
    Battery Current / Life: 0.4 mA / 1200 Hours Typical (Alkaline)
    Switch Off, On-Flat, On-Roll-Off
    Output Connectors Output Connector (Power Module): Integral 3-Pin XLRM-type
    Dimensions (H x W x D) Microphone (L x Diam): 1.0 x 0.4" / 25.0 x 10.2 mm
    Power Module: 3.3 x 2.5 x 0.9" / 84.0 x 63.0 x 22.0 mm
    Cable: 6.0' / 1.8 m Long
    Weight Microphone: 0.1 oz / 2.8 g
    Power Module: 4.9 oz / 138.9 g
    Packaging Infocaxqwraxeuxqssyfsyzyduxfztwbqevvyrxxw
    Package Weight 1.145 lb
    Box Dimensions (LxWxH) 10.35 x 4.45 x 1.75"

    Audio-Technica AT831B Reviews

    AT831b Cardioid Condenser Lavalier Microphone is rated 4.6 out of 5 by 32.
    Rated 5 out of 5 by from A CLASSIC MIC FOR ALL TIME i am a legal video specialist and need a rugged wired mic that rejects background noise and delivers clear crisp speech. I have used the AT831b for nearly 20 years, and they get dropped, abused, yanked and spit on and give many years of good service. Once in a while I have to replace one, but I would never consider anything else for my work. I capture testimony that can never be re-done if anything goes wrong, and no excuses will be accepted. I can't say anything negative about this AT mic, it never disappoints. I haven't used it with a guitar, but I have used it as a musical soloist, and it is great for that too.
    Date published: 2014-10-20
    Rated 4 out of 5 by from Just bought another one I am recording voice between actors in a room with too much air conditioning rumble. The AT831 pick-up pattern has been a good tool for improving the voice-to-rumble ratio on my videos. That means I have to do less post-processing on my audio tracks. The power box seems larger than it needs to be - I run wired using phantom power over the XLR connector, so I don't need the battery. AT could also improve the lapel clip a bit - perhaps make the alligator a bit wider? - so that it is more likely to stay where I put it. I tend to be kinda rough on gear - I've already dropped the microphone capsule a couple of times - but it's surviving so far.
    Date published: 2011-03-16
    Rated 5 out of 5 by from superb quality sound I'm using this microphone as an input on my Zoom H4N handheld audio recorder and am very happy with the quality of the sound I'm getting. I'm also very happy with the level of isolation from background noises that this microphone give me. The microphone and power module come in a smart hard-case which is very welcome when the unit is in my gear bag though the power module is metal and does not come with any slip case so I'm slightly worried about it falling off my interviewee's belts and smashing if it hits a hard-floor.
    Date published: 2010-08-22
    Rated 5 out of 5 by from I love 'em I've owned a pair of these great mics for over ten years and have not had a moment's trouble. They have traveled with me on numerous trips to locations in Africa, Europe, the Caribbean and throughout the United States. The AT831B's are very reliable mainstays of my audio kit
    Date published: 2009-11-15
    Rated 5 out of 5 by from A great and warm sound the sound of this microphone is warm and it has a good presence in the low medium, It's a complementary solution to other more aggressive products of the market. It can be used in noisy conditions. Its construction is robust and the manufacture of very beautiful quality The battery power supply solution is useful
    Date published: 2012-04-02
    Rated 5 out of 5 by from Lav Mic An Excellent Addition The Cardioid Condenser Lavalier Microphone from Audio-Technica has allowed the Patriot League to produce high-quality video features with crisp, clear interviews. The microphone does a great job at singling in on the interviewee so that any background noise will not interfere, even in loud arenas or outdoor venues. It is easy to use and effortless to set up. We will use it with all of our web streaming programming, including feature interviews and periodical online shows.
    Date published: 2010-10-04
    Rated 5 out of 5 by from The Perfect Lav If you're looking for a good lavaliere microphone for interviews or other up-close audio work, look no further. I have used this microphone extensively, from applications ranging from television broadcast to music production, and it always does the trick. I honestly have no reservations about this mic.
    Date published: 2011-03-02
    Rated 5 out of 5 by from Audio-Technica 831B great microphone I purchased this microphone to use on a guitar for live sound. Works great for live and recording. It's quick and easy. It has a warm and natural sound. I would purchase another if needed. As with all AT mics I've owned, great quality and value for the price.
    Date published: 2017-04-06
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    Is this wireless to the receiver/amp?
    Asked by: Anonymous
    Hi! No, it is completely wired. Must be connected to the receiver. I consider this microphone (AT831B) is more for passive situations, interviews where the speaker does not need to move from one place to another while shooting. Of course you can, but you need someone to watch cables and connections.Enter an answer to this question.
    Answered by: Luis P.
    Date published: 2018-08-28


    Where can I get a wind cover for this microphone?
    Asked by: Anonymous
    Auray - Fuzzy Windbuster for Lavalier Microphones (Black) B&H# AUWLW
    Answered by: Mark S.
    Date published: 2018-08-28


    Using for interviews.I'm getting a lot of noise from this microphone that I wouldn't expect. Very sensitive to any movement near the microphone like a jacket moving, heavy breaths causes overmodulation. I use the windscreen at all times and that helps some. It's pretty annoying. I've used dozens of mics over the years and have never had this much problems. Am I doing something wrong?Any suggestions? Would a unidirectional mic be better.
    Asked by: Gene D.
    The Audio-Technica AT831B is a unidirectional microphone, suitable for professional video, broadcast and sound reinforcement applications. The fact that it is a condenser makes it more sensitive than your traditional dynamic hand-held interview mic. In video production, condensers are preferred because of their sensitivity- especially when pristine audio is demanded. In your case, I would try a couple of things before considering a mic change. 1. Engage the low-cut filter. The power switch has three positions: off , flat , and low-cut . The low-cut filter makes the microphone less sensitive to low frequencies found in wind, breath noise, and general ambiance. 2. Consider adding the Rycote Undercover (B&H#RYUC) lavalier wind cover and adhesive mount to your sound bag. The covers help reduce rustling noise caused by cable movement and friction between the mic element and clothing.
    Answered by: Andrea O.
    Date published: 2018-08-28


    Does this microphone have GSM or cell phone interference? I have the AT803b, and I get interference from GSM cell phones near the microphone.
    Asked by: Luke A.
    I haven't noticed cell interference, but it does have a ton of handling noise. Even the faintest fabric rustle is pretty noticeable.
    Answered by: Flora L.
    Date published: 2018-08-28


    What records the sound? The camera or the mic's memory card?
    Asked by: Anonymous
    This mic has an XLR cable so if your camera has an XLR input then you can record to your camera. The mic doesn't have a memory card. I film with a DSLR so I use a Zoom H4N to pass the mic input to my camera.
    Answered by: Hans M.
    Date published: 2018-08-28


    Can I connect the AT 831B ( with the power supply module ) in an acoustic guitar amp with a XLR input and already providing a phantom power of 16 V?
    Asked by: Anonymous
    The AT831B can operate on phantom power ranging from 9-52 volts and also using battery. There would be no issue connecting to a device that provides 16V phantom via XLR.
    Answered by: Jeff P.
    Date published: 2018-08-28


    Can I plug this into my Sony HandyCam (Camcorder)?
    Asked by: Anonymous
    I haven't looked closely at the Sony HandyCam, but most compact consumer camcorders have a 1/8 inch (3.5 mm) port to plug in a microphone. To plug this mic into that port, you'll need to get a cable that has female XLR connector at one end and male 1/8 inch (3.5 mm) plug on other end.
    Answered by: Julia S.
    Date published: 2018-08-28


    I'm looking for the best possible lavalier microphone for professional videography. I currently have an NTG3 Rode Shotgun Mic, so I'd want to match that quality with a lavalier that can be used on a ursa mini 4k with XLR inputs, wireless to the lavalier location. I'd appreciate any suggestions for budget and best for price, what do the experts think?
    Asked by: Adrian D.
    I have a rode NTG2 and this mic. I just used it on a documentary I filmed with a Sony NX5U and it sounded great and I got several comments on the audio quality. I have had mu eye on the URSA Mini, what are your thoughts on the URSA, would you recommend it?
    Answered by: Keith H.
    Date published: 2018-08-28
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