Audio-Technica AT831b Cardioid Condenser Lavalier Microphone

BH #AUAT831B • MFR #AT831B
Audio-Technica
Audio-Technica AT831b Cardioid Condenser Lavalier Microphone
Key Features
  • Clip-On Lavalier Microphone
  • Great on Guitars
  • Full Rich Sound for Vocals & Instruments
  • Frequency Response: 40 Hz to 16 kHz
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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.
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$199.00
$34/mo. suggested payments
with 6 Mos. Promo Financing* 
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Audio-Technica AT831B Overview

  • 1Description
  • 2Miniature Capsule
  • 3Cardioid Polar Pattern
  • 4High Sensitivity

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

Audio-Technica AT831B Specs

TransducerPermanently Polarized Condenser
Polar PatternCardioid
Frequency Response40 Hz to 16 kHz
Low Frequency Roll-Off80 Hz, 18 dB/Octave
SensitivityPhantom: -44 dB (6.3 mV) re 1 V at 1 Pa
Battery: -46 dB (5.0 mV) re 1 V at 1 Pa
ImpedancePhantom: 200 Ohms
Battery: 270 Ohms
Maximum Input Sound LevelPhantom: 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 Ratio65 dB, 1 kHz at 1 Pa
Power RequirementsPhantom Power Requirements: 11 to 52 VDC, 2 mA Typical
BatteryBattery Type: 1.5 V AA/UM3
Battery Current / Life: 0.4 mA / 1200 Hours Typical (Alkaline)
SwitchOff, On-Flat, On-Roll-Off
Output ConnectorsOutput 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
WeightMicrophone: 0.1 oz / 2.8 g
Power Module: 4.9 oz / 138.9 g
Packaging Info
Package Weight1.145 lb
Box Dimensions (LxWxH)10.35 x 4.45 x 1.75"
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I have a Tascam DR-701R that provide phantom ...

I have a Tascam DR-701R that provide phantom power, so still I need piut the Battery in the AT831B?
Asked by: Ezequiel
No
Answered by: Amy
Date published: 2019-07-23

question

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

question

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

question

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

question

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
I haven't directly compared the AT831b with a shotgun mic of that caliber, but I definitely think this is one of the best clip-on mics you can get at this price point. The diaphragm is nice and large, which gives you a fuller sound than more expensive subminiature models. Let me also mention the AT803b. It's slightly cheaper, and the sound feel is slightly different, but at least as good as this mic. I think you get a slightly richer low end with that mic than with this one (in exchange for omnidirectionality), but they're so close, it's hard to tell for sure.
Answered by: Matthew T.
Date published: 2018-08-28

question

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

question

What records the sound? The camera or the mic's memory card?
Asked by: Anonymous
This mic plugs into the video camera and the sound is recorded along with the video on the camera's memory card. Or you can plug it into a mixer along with other Mics and of course the camera and all the video and sound get recorded on the memory card in the camera.
Answered by: Elisa U.
Date published: 2018-08-28

question

Where can I get a wind cover for this microphone?
Asked by: Anonymous
I don't know if you're searching for a replacement wind cover or not, but this mic does come with one. It's listed in the 'In the Box' section of the item page. There is also a standalone option buy the same one that comes in the box.
Answered by: Elliot H.
Date published: 2018-08-28
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