[AG-TECH] Tabletop-Room mic with integrated echo canceling

Michael Braitmaier braitmaier at hlrs.de
Wed Jun 20 10:29:45 CDT 2007

Hi everyone!

I just wanted to let you all know, what I finally came up with.
As availability of the ClearOne AccuMic PC is very rare and is not 
produced anymore (according to my national reseller)
I decided for a solution which is in the beginning a bit more work. I 
ended up buying the following DSP-EchoCanceler-Board


Basically it does the same as their PCI-Card which however only fits in 
Desktop-PCs. (see link for information: http://www.accessgrid.org/node/116)
In addition to the board I bought some stuff to put everything in a 
small case and have 3.5mm (like they are common among PCs) connectors in 
that case.
The result is a small echo canceler device that is portable can be used 
with PCs and Laptops and in conjunction with small audio mixers
like from Behringer it can echo cancel a tabletop and a wireless mic. 
The whole cost only was about 180Euro for the complete box.

Fields of application for us will be, to quickly equip rooms with 
AccessGrid in conjunction with a table top microphone for conferences up 
to a max. of ~10 people.
Furthermore usage on exhibitions in conjunctions with wireless mics, 
AccessGrid and our collaborative software is intended.

I consider that cheap and more flexible even compared to the ClearOne 
AccuMic PC which in Germany was around 650 Euro.

So that's my 2 cent.

I might post an entry in AccessGrid.org's hardware section, however I am 
not sure whether that would be of use as you can't buy that box
but only the parts to assemble it.


Michael Braitmaier schrieb:
> Hello everyone!
> I am a bit in trouble as I need to order a tabletop mic with 
> integrated echo cancelation quite fast, however don't have experience 
> with them. So I would like to rely on your experiences.
> So can anyone recommend one or two of such mics, which work fine and 
> produce good results, for direct connection into a 3.5mm PC-Audio-in?
> I have just had a look at the follwoing Clearone Mic ( 
> http://www.clearone.com/products/product.php?cat=4&prod=17 ),
> which seems to be able to work on PCs directly. Does anyone of you 
> already have experience with this one?
> Thanks in advance
> Michael

Dipl.-Inf. Michael Braitmaier
HLRS - Visualization / Video Conferencing
University of Stuttgart
Phone: ++49 711 685 65996
Fax  : ++49 711 682 357
Website: http://www.hlrs.de/people/braitmaier/

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