[Elecraft] Is NR effective on ssb?

[O. Johns]

Hi John,

Yes, seems impressive.  Uses a the envelope shape of the speech waveform to distinguish it from noise.  The examples, however, do not meet the test I asked about:  Is something UNINTELLIGIBLE without the device and then INTELLIGIBLE with it?  Also, it is a bit pricey at some $300 to $400.  Otherwise, I might be tempted to try it.

Many thanks for the tip.  I'll keep my eye on that product.

Oliver
W6ODJ


On 15 Feb 2010, at 3:32 PM, juergen wrote:

> 
> Hi Oliver
> 
> If you like experimenting  try this product. I have been using it on the low bands for a while now, and I am very impressed. I have not found a radio with an inbuilt DSP that will beat it.
> 
> 
> http://www.ing-michels.de/hamradio.html
> 
> John
> 
> --- On Mon, 2/15/10, O. Johns <ojohns at metacosmos.org> wrote:
> 
>> From: O. Johns <ojohns at metacosmos.org>
>> Subject: [Elecraft] Is NR effective on ssb?
>> To: "Elecraft_List" <Elecraft at mailman.qth.net>
>> Date: Monday, February 15, 2010, 2:49 PM
>> Folks,
>> 
>> I wonder if anyone has an A-B comparison audio recording
>> that shows a SSB signal that is UNINTELLIGIBLE with NR off
>> become INTELLIGIBLE with NR on?   (Note NR,
>> not NB which is a different animal altogether.)
>> 
>> Maybe it is my ultra-high-noise urban environment, but I
>> have not found any combination of settings of NR, RF gain,
>> AGC, etc., etc. that lets me copy a SSB signal that I can't
>> already copy without NR.  And I use the good Yamaha
>> headphones that have been discussed on the reflector. 
>> My theory is that S8 noise flummoxes the NR algorithm so
>> much that it actually becomes a hindrance.  Maybe it
>> can't really distinguish high noise from voice.
>> 
>> This is not to criticize Lyle or the K3.  I imagine
>> that these algorithms have their limits no matter what radio
>> they are run on.
>> 
>> 73,
>> 
>> Oliver Johns
>> W6ODJ
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> 
> 
> 
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