[Elecraft] K4 -- Spectral subtraction noise reduction

[Tom Doligalski]

Spectral subtraction was used in the JPS noise reduction units long ago. I still have my NIR-12. 

Tom W4KX

Sent from my iPad 

> On Sep 11, 2020, at 12:21 PM, Wes <wes_n7ws at triconet.org> wrote:
> 
> https://www.rtl-sdr.com/forum-talk-videos-from-hamvention-2017/ 51 minutes in.
> 
> Wes N7WS
> 
> 
> 
>> On 9/11/2020 6:32 AM, Kurt Pawlikowski wrote:
>> Grant,
>> 
>>     You peaked my interest. I attempted to find examples of spectral subtraction and only found talks about it (no audio examples). Would you happen to know where I might find some examples? Maybe comparing results between several noise reduction methods?
>> 
>>     Thanks!
>> 
>>     kurtt WB9FMC
>> 
>>> On 9/10/2020 11:19 PM, Grant Youngman wrote:
>>> I’ve recently been exploring quite a few of the many SDR receivers on KiwiSDR.  One of the (many) features of this system is an option to select spectral subtraction NR.
>>> 
>>> I’m now really hyped about the fact that this will be available at some point on the K4.  It works exceptionally well.  So well, that I leave it turned on most of the time.  Often, stations you can barely copy down in the junk literally pop up out of the noise.  Don’t know if this will be available at initial shipment, but it’s certainly something to look forward to if not.  I’ve only tried it on AM and SSB at this point, so not sure about CW.
>>> 
>>> Just something else to whet the appetite for that eventual “you’re up” email from Elecraft sales …  :)
>>> 
>>> Grant NQ5T
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