I also find that a lower pitch has become easier on the older ears, although it never really was a concern, tending to change it to suit condx and such. For example, I used to intentionally change the pitch when doing CW contesting, relieves the monotony a bit sometimes, can be useful when ear fatigue rears its ugly head.
About a year ago I began re-learning CW.
Starting with 700 Hz gradually went down to 300 Hz.
I would experiment with lower frequencies but pitch below 300 Hz is simply not available on the most transceivers.
Two reasons for using the lowest available pitch:
- It is easier for our brain to distinguish nearby signals at lower frequencies;
- By switching between CW and CR-R modes it is possible to move most of the QRM to the sub-audible range.
Very low CW pitch sounds unnatural and difficult to copy at first, but with practice it became as comfortable to copy 300 Hz pitch CW for me as higher pitches.
I was reading this thread the other day....and thought I would see how it goes...I am still learning...I reduced the Pitch down from 750 to 650. And for some reason....last evening was the best practice and seemed to have good progress compared to previous days...
Not sure why, I am thinking maybe its the pitch were I went from just hearing to actually listening.