[AG-TECH] Echo canceller

Robert Olson olson at mcs.anl.gov
Tue Jul 22 10:30:45 CDT 2003

And if you're clever, you can make the button cause the gentner to mute the 
mic, and make the gentner drive the LED based on mute status. This way, the 
gentner is always listening on the mic and doing it's EC/ambient noise 
level adaptation measurements.

There's an appnote on the gentner/clearone website on doing this.


At 08:00 AM 7/22/2003 -0700, John Shalf wrote:

>On Monday, July 21, 2003, at 09:37 PM, Markus Buchhorn wrote:
>>At 14:43 21/07/2003 -0700, Ed Ritenour wrote:
>>I'd agree with this sentiment, on the impact of background noise - we 
>>decided to use ceiling mounted boundary mikes to cover the rooms in all 3 
>>of our nodes (so far), with no ceiling mikes and no lapel mikes wanted or 
>>needed. I've seen a few sites where desktop mikes and poor autogating 
>>just killed the experience. But, muting mikes on-demand is a pain for 
>>somebody to manage. People are still the most expensive asset in a node.
>Desktop mics like the Shure 412D or the 312 series have a touch/toggle 
>switch on the front of the mic.  A green LED indicates whether the mic is 
>on or not.  No need to have the operator do the muting.

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