[Elecraft] Copying CW and Pitch

[Dave Cole]

Jim,
Here is an interesting story:

I had a hearing test many years ago, and asked to see the results. 
Turns out I had a null at some frequency I don't remember right now, but 
it was exactly where I had selected my sidetone to be...  My guess is 
because I heard less noise there...  Anyway--

I re-selected a new sidetone, lower in frequency, and on a small peak... 
  My CW speed for copy increased probably 10-15%.

Now whenever I get a hearing test, I ask for a copy, and put the 
sidetone where my highest peak is, within the range Elecraft allows for 
sidetone.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 3/13/21 3:44 PM, Jim Brown wrote:
> On 3/13/2021 10:48 AM, Sverre Holm (LA3ZA) wrote:
>> A CW sidetone pitch of 400 Hz is consistent with what little research 
>> there
>> is on this. A paper from 1992 says that "/All subjects improved their
>> recognition as the frequency was lowered to 500 Hz, some even at 250 Hz.
> 
> As a retired designer of large sound systems, I had to learn a lot about 
> acoustics and psychoacoustics (the science of how humans' ear/brain 
> interprets what we hear). That science tells us that, like most of our 
> senses, hearing is logarithmic both with respect to frequency and 
> loudness. This means that our discrimination of one frequency as 
> compared to another increases with decreasing frequency. That is, we are 
> better able to separate signals from each other with RX pitch set to 
> lower frequencies.
> 
> 73, Jim K9YC
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