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Polsen Omnidirectional USB Boundary Microphone with Mute

BH #POUSOB33 • MFR #US-OB-33
Polsen
Polsen Omnidirectional USB Boundary Microphone with Mute
Key Features
  • For Video Conferencing & Home Recording
  • Omni Polar Pattern for 360° Pickup
  • Easy Plug-and-Play Operation
  • Onboard Mute Switch
With its CD-quality sound and simple plug-and-play hookup to your computer, the Polsen US-OB-33 omnidirectional USB boundary microphone offers improved audio performance and intelligibility over your computer's internal mic, making it beneficial for video meetings, conferences, and even interviews. The omnidirectional polar pattern of the US-OB-33 delivers 360 degrees of responsive sound pickup, allowing participants to converse naturally while seated comfortably around the microphone.
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Polsen US-OB-33 Overview

  • 1Description
  • 2Boundary Microphone
  • 3Omnidirectional Polar Pattern
  • 4CD-Quality Sound
  • 5Plug-and-Play Operation
  • 6USB Output
  • 7Mute Switch
  • 8Rugged Metal Construction

With its CD-quality sound and simple plug-and-play hookup to your computer, the Polsen US-OB-33 omnidirectional USB boundary microphone offers improved audio performance and intelligibility over your computer's internal mic, making it beneficial for video meetings, conferences, and even interviews. The omnidirectional polar pattern of the US-OB-33 delivers 360 degrees of responsive sound pickup, allowing participants to converse naturally while seated comfortably around the microphone.

Thanks to its bus-powered, driver-free design, the US-OB-33 is ready for use out of the box, no batteries or software installation required. The mic's built-in A/D converter operates at 16-bit / 48 kHz digital resolution to ensure accurate voice capture into your computer. The durable metal housing features a convenient mute switch with LED indication to enable private discussions during meetings.

Boundary Microphone

You've probably experienced dropouts, feedback, and poor audio quality with your computer's internal microphone, and at the worst possible moments. The US-OB-33 adds reliable CD-quality sound to your video meetings for you and any participants sitting around the microphone.

Omnidirectional Polar Pattern

The microphone features an omnidirectional polar pattern that uniformly picks up sound 360 degrees around the microphone. You can sit comfortably at your desk, look around if you like, and not focus on speaking directly into the microphone. Set it in the center of a table, and all participants seated around it will be clearly heard.

CD-Quality Sound

US-OB-33 has an internal A/D converter so no additional audio gear, like an A/D interface, is necessary to use the mic. It boasts 16-bit / 48 kHz digital resolution for accurate, CD-quality sound.

Plug-and-Play Operation

Plug the US-OB-33 into an available USB port on your desktop or laptop computer, and you're ready to go. You won't need to wait for software to download in order to use the microphone.

USB Output

The US-OB-33 is bus powered, so just use the included cable to plug the microphone into a powered USB port on your computer, select the mic in your audio settings, and it's connected and ready to go. No extra power cables or batteries are needed.

Mute Switch

Nothing matches the confusion of not knowing if the microphone is muted. A red LED indicator lets you know that the microphone is muted so you can have a side conversation or clear your throat without interrupting a conference or meeting.

Rugged Metal Construction

This boundary mic's durable metal construction is made for repeated use in demanding conference room and office environments. It's also solid enough to take with you when you're on the go, and it will withstand bumps when you pack it into your computer case.
UPC: 847628036956

Polsen US-OB-33 Specs

Microphone
Form FactorBoundary/Surface Mount
Sound FieldMono
Operating PrinciplePressure Operated
Capsule1 x Condenser
Polar PatternOmnidirectional
OrientationSide Address
CircuitrySolid-State
PadNone
High-Pass FilterNone
Tone AdjustmentNone
Indicators1 x Green/Red Single LED (Power, Status)
On-Board ControlsMic Mute
WindscreenNone
Performance
Frequency Range100 Hz to 16 kHz
Maximum SPL110 dB SPL
Sensitivity-42 dB
Dynamic Range80 dB
Signal-to-Noise Ratio60 dB
Connectivity
Output Connectors (Digital)1 x USB Type-C Female
Cable Length6.6' / 2.0 m
Digital Audio
A/D Conversion16-Bit
Sample Rate48 kHz
Operating System SupportWindows, macOS/OS X
OS CompatibilityWindows
macOS
*As of January, 2021: Check with manufacturer for the most up-to-date compatibility
Available PortUSB 2.0
Power
Bus PowerUSB
Operating Voltage5 V (USB Bus Power)
Operating Current Consumption200 mA
Physical
MountingTabletop (via Integrated Hardware)
Mounting Thread SizeIncluded Mount Has No Threading
Construction MaterialABS, Metal
CertificationsCE, RoHS, as per Manufacturer
Dimensionsø: 2.8H: 0.6" / ø: 7.1H: 1.5 cm
Weight4.9 oz / 139 g
Packaging Info
Package Weight0.515 lb
Box Dimensions (LxWxH)4.7 x 4 x 1.2"

Polsen US-OB-33 Reviews

Well built for audio conference

By Sam
Rated 5 out of 5
Date: 2022-04-13

One of my colleagues was using this little microphone during the conference call and the sound quality was pretty good. So, I asked the microphone info and he shared the Polsen info and it was on sale from B&H where I buy all my tech gears. It gave reliable sound quality any participants sitting around the microphone. And it worked well when plug the microphone into an available USB port on your desktop or laptop computer using an USB Type-C cable. The mute button on microphone is also useful.

Good for conference calls and remote work

By Duncan
Rated 5 out of 5
Date: 2021-09-21

I received this product in exchange for my honest review. I just completed a video review of this mic on my YouTube channel "techmundane" if you want to hear how it sounds. The mic is plug and play and even worked seamlessly with my Linux laptop. provides a consistent omnidirectional reception pattern that was tested at distances up to 10 ft in my review. This is a great option if you want a mic on the table that multiple people could use for calls.

Decent microphone overall, but major flaw with the button

By Callum
Rated 2 out of 5
Date: 2021-06-23

The build quality on this mic is really good, and the sound quality is decent (although I was hoping it would be clearer and more crisp, but it's still better than my laptop mic), however there is one kind of major flaw. The mute/unmute button (which is the reason I needed the microphone) makes a LOUD clicking sound when you press it. This peaks the audio like crazy and everyone on your call/meeting will hear when you mute and unmute (which sounds incredibly annoying if you're doing it a lot). Given this is a primary feature of the mic (and again the reason I bought it) I gotta knock off a few stars. I would have given it 5 otherwise, so if you don't need the mute button (or don't mind annoying everyone on your call) then I would recommend it.

Well built, handy little mic.

By Jim
Rated 5 out of 5
Date: 2021-05-12

Really good little mic and a great addition for my zoom/teams calls. Been making a ton of these video calls from my computer (for obvious reasons) and this has been very helpful. My computer set-up has the built-in cpu mic too far for good audio. I've had to talk very loud for people to hear me well. This mic has improved my voice a lot. Now I can talk normally with zero problems and the sound quality is much better. Although I have not been in this situation, I think it would come in handy when there is multiple people also. Just place it between the people talking and you should be good to go. Also, the build quality seems fantastic and super sturdy. Made of metal construction with some nice weight to it. It feels like it will last a long, long time. I love that it has a mute button on top of it, with a bright light, letting you know clearly if it is on or off (green on, red off). This is super convenient. No need to search around with your mouse to locate the little button on the zoom/teams app. And no more talking with the mic off accidentally because the lights make it obvious. This is so helpful, especially when making a presentation. I also love that it comes with a long usb cable that disconnects from the mic itself. Like I previously mentioned, my cpu is a good distance from me, so having a nice long cable makes it very easy to connect. That's fantastic and appreciated. Also, having the cable removable is great, because that connection is usually the weak point that could possibly break. This eliminates that which is nice. Overall I'm super happy with this mic and it's made my zoom/teams calls better. [I have received this product in exchange for my honest review]

Small, sturdy, well-built mic

By Nick
Rated 5 out of 5
Date: 2021-05-05

The Polsen UB-OB-33 is a great addition to my laptop. I use it primarily for Zoom/Teams/Google calls. I did some before and after testing and everyone on the other end said that my voice sounded much more clear when using this mic. I think the place where this mic really shines is when you have more than one person on the call. Because of the pickup pattern, you can be on any side of the mic and it's going to pick you up clearly. It's really nice to not have to be constantly pointed towards the center of the mic. This mic feels super sturdy and well made. It's also plug and play and bus-powered so no need for batteries. Lastly, the mute button in the center is a great addition. Overall this mic is a great upgrade from the mic inside my laptop. (I received this item in exchange for my honest opinion)

Great Build Quality; Low Output

By Mark
Rated 3 out of 5
Date: 2021-03-14

The build quality is awesome & is a plug and play device. In my testing on both Mac and PC's, the audio output is a bit low, even when max'd out in Preferences or Control Panel. Very clean audio, just low, which of course can be corrected for in a DAW or NLE. Like the built in mute button. Great solution for smaller podcasts.

Works well

By Robert
Rated 5 out of 5
Date: 2022-04-13

This is perfect for a small group sitting around the dining room table. Not sure if it works for large groups theater seating

I LOVE having a true mute button!

By Shawn
Rated 5 out of 5
Date: 2022-02-06

I've been using the Polsen US-OB-33 for a few weeks and, as most of my work is now done remotely, the meetings never seem to end. Having a tactile mute button, and not relying on Microsoft Teams or Zoom's graphical interface, gives me peace-of-mind when I have to chase our toddler around or answer the door for a package delivery during a business call. I'll never go back to conference calls without it. I received this product in exchange for my honest review.

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Would this mic work well for dictation with ...

Would this mic work well for dictation with programs such as Dragon Naturally Speaking?
Asked by: Peter
Although this can work for dictation software, it will pick up surrounding conversation in the room. This Polsen Omnidirectional USB Boundary mic would work great for recording meetings, or for remote video conferencing - but I would not recommend it for use with dragon primarily. This Polsen dynamic USB mic would be a better option, for isolated capture of a single voice for transcription: https://bhpho.to/371Sf8P USB headset mics like the Logitech H570e can also be a good choice for transcription: https://bhpho.to/3Lw7F4r
Answered by: Jordan
Date published: 2022-03-30

Can this mic be use for dictation when using ...

Can this mic be use for dictation when using programs like Dragon Naturally Speaking?
Asked by: Peter
Yes you can use the Polsen US-OB-33 for dictation applications.
Answered by: David
Date published: 2022-03-30

It appears that the cable is USB Type-C to USB ...

It appears that the cable is USB Type-C to USB Type-A. Is it possible to use a regular USB Type-C to USB Type-C for the microphone connection?
Asked by: Sam
Yes, it is possible to connect this Polsen Omnidirectional Boundary microphone to the USB-C port on a computer, using a cable like I am linking below: https://bhpho.to/3DsGogu
Answered by: Jordan
Date published: 2022-03-30
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