[Elecraft] CW Pitch Resolution

[Stephen Prior]

Oliver,

My K3 goes down to 300Hz!

73 Stephen G4SJP


On 20 October 2013 18:43, Oliver Johns <ojohns at metacosmos.org> wrote:

> Hi Jim,
>
> My only gripe is that the K3 choice range doesn't go down to 400 Hz.  I'd
> like to use 440, a pure standard A.
>
> 73,
>
> Oliver
> W6ODJ
>
>
> On 19 Jan. 2013, at 22:30 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
>
> > On 10/19/2013 2:36 PM, Al Lorona wrote:
> >> When I was a kid 750 Hz was the most popular sidetone frequency. I have
> noticed a steady decrease in the consensus spot frequency over these 40
> years. I don't know why.
> >
> > I'll inject some science into the discussion based on my profession of
> electroacoustics.  Human perception of sound is logarithmic, both with
> respect to amplitude and frequency (pitch). Another way of saying it is
> that our ability to separate two notes is a function of their percentage
> difference.  For the same bandwidth in Hz, we have better discrimination
> between two note a lower frequency, because the difference is a higher
> percentage of the frequency.  So it's easier to discriminate a 100 Hz
> difference at 450 Hz than at 750 Hz. That's one good reason to use a lower
> pitch.
> >
> > Another is that for most (but not all) of us, hearing loss is greatest
> at higher frequencies, so we old farts tend to have somewhat better hearing
> at 450 Hz than at 1 kHz.  That's not universal though -- those of us who
> were exposed to noise (usually at work) that's much louder at some
> frequency(ies) tend to develop notches in our hearing at those frequencies.
> >
> > 73, Jim K9YC
> >
> >
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