[Elecraft] [K3] K3 DSP LPF daughterboard - What is an artifact and where can you find them?

[Don Wilhelm]

Brendan,

Not to be argumentative, but some with HF hearing loss may be bothered 
by this distortion even though it is low level and is not in the range 
of conscious hearing.  When I first became aware of my HF hearing loss, 
I found that I was increasingly irritated by low grade audio devices 
because of the THD.  It seems I can 'sense' the distortion even though I 
cannot actually hear in that range.  Strange as it may seem, I went on a 
quest for better fidelity in sound as my hearing loss became worse.  I 
have mentioned this phenomenon to several knowledgeable dealers in audio 
equipment as well as my audiologist and they have confirmed what I have 
observed.  If the hearing loss is across the full spectrum, the 
increased perception of distortion is not present.  My lower range 
hearing remains normal, and my audiologist tells me that is an unusual 
condition, so that may have something to do with my perceptions.  I will 
put the LPF on my K3, 'just in case'.

73,
Don W3FPR.

Brendan Minish wrote:
> As I have pointed out before, It's subtle, you are not going to hear
> this at all if you have HF hearing loss,  the D to A chip is performing
> per spec and the K3 prior to this change is already better than a lot of
> the competition.  
>   
>