> My only gripe is that the K3 choice range doesn't go down to 400 Hz.
It certainly does - it goes down to 300 Hz. However, I find A4 a bit
low for my taste - I'm satisfied with a 3.88 Hz error on B4 or 3.25 Hz
error on C5.
73,
... Joe, W4TV
On 10/20/2013 1:43 PM, Oliver Johns 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 <[email protected]> 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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