We have a system using the Beam Former mic array from Clearone, through a Converge Pro as the DSP and using a DMPS for amp and switching.

We have everything balanced out and I've done multiple test calls both through the clearone dialer and through the cisco vtc and the other didn't report any echo issues. I of course watched the levels to monitor the echo cancelation as well.

The client is reporting that multiple sites are having echo issues when calling this site. I will be going up there today to test, but this has been an ongoing issue that I thought was solved as the system has been in place for a few months.

Does anyone have any experience with this unit or any other ideas of how I might be able to tackle this issue. 

Maybe the equipment at the other sites is not as good as what you've got, and the problems are not yours? I mean, not on your end. Of course they're yours, because you touched it last.

How are you setting your AEC Ref and also how are you controlling volume level? If youre referencing your line out being fed to the DMPS amp but then using the DMPS to adjust volume levels, it will throw it way out of whack.

All levels are balanced (and as close to 0 as possible) in the DSP and vol control is being handled through the DSL. Using the DMPS as an amp basically, and An audio breakaway for the switch inputs.

Part rts of me things they are just hearing some slight reverb from the room acoustics. Not sure if there is a way to help that with EQ

Yeah it's a bit of a tricky one. What clients say is happebibf and what is really happening are generally miles apart from each other!

So after giving them some examples and description of what different issues sounds like, they picked #2 which was basically room acoustics and reverberation.

ive asked a few guys and none of them have said that they do any room acoustix absorption panels in any of their vtC rooms. They address whatever there is with EQ and call it good. Even when using ceiling mics.

we have the beam former mic mounted to the ceiling so the speakers are anywhere from 4-7' away.

What EQ adjustments would I be looking at. We EQ the playback audio for vocal clarity but nothing with the mic, if even possible.

Many other suggestions for attacking the "speaker phone in a bathroom" sound?
 

Just call clearone and they will be able to help you out.

I was in a training for converge pro units and, they just said to give them a call anytime you had issues programming. They are there for that.

Ron Lynch, CTS [[email protected]] was the trainer. Try to give him a call. We had basic training on the beamformer so I can't help you much.

I hope this helps...

+1...

Their tech support is awesome.

I went through about 4 different sessions of Tech support in the initial install of this thing since it was my first one. They all were nice and seemed helpful, but never really go the issue fixed. Finally the last person had some setup tips and helped me get a couple things zero'd out that i was adjusting in the wrong place, limiting how well the EC worked.

it sounds now like echo isn't the issue, but just reverb type sound in the room. i'll still check with support for any help. 

Well, you need to learn to describe "Echo" more accurately.

When you say "Echo" in the same conversation as a telephone hybrid or VTC, it implies something very specific, technically.

When you say "Echo" in more colloquial usage, in the sense of "wow this canyon has a long echo", it generally implies something else very specific, technically.

Go get smart: [Link: en.wikipedia.org]
[Link: en.wikipedia.org]


If your customer is complaining that the FAR END can hear THEMSELVES, then you have an Echo Cancellation problem. If your customer is complaining that the FAR END hears the NEAR END voices 'smeared' you have a reverb problem.

Right....

| On 1418855188, sofa_king_CI said...
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So after giving them some examples and description of what different issues sounds like, they picked #2 which was basically room acoustics and reverberation.

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Tough to know exactly without more info. Is the echo what near end or far end participants experience. Or are you referring to feedback, that horrible noise that makes you cover your ears? Does this happen only when you are in a VTC call and then add an ATC call? Is the echo only when in an ATC call?

BNC